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Amian, Atsé Franck, Eboua Narcisse Wandan, Melecony Célestin Blé, Adja Ferdinand Vanga i Pierre Joseph Assi Kaudhjis. "Etude Des Determinants Socioeconomiques Et Techniques De La Psciculture Extensive En Cote D’ivoire". European Scientific Journal, ESJ 13, nr 6 (28.02.2017): 389. http://dx.doi.org/10.19044/esj.2017.v13n6p389.
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The contribution of fish farming is relatively low in the national consumption of fish products. Yet the country has a significant socio-natural potential, which well valued can reduce fish imports and enhance food security. This study, based on a survey conducted in the two main areas of extensive fish farming (Central West and Southwest), was to analyze the technical and socioeconomic determinants of family fish farming to support the dynamic development of this activity. The results showed that 98% of fish farmers are men of 51 to 60 years old. Most of them are illiterate practicing agriculture as their main activity. Farming infrastructure are usually composed of dams ponds (90%) of 0.25-1.5 ha, and ponds of 0.1 ha. Water was provided either by river (95%) or groundwater (5%). On average most farms are of mall size (3 ha) and were acquired by purchasing lands. Fish farmers mainly practiced mixed farming of Tilapia (Oreochromis niloticus) and Heterotis (Heterotis niloticus). In 60% of the cases, fish farming is associated with rice cultivation practiced in the shallows. Fish were mainly fed with rice bran. An important number of farmers (72%) practiced sexing of in order to improve their yields. Furthermore, 60% of them have a lower production to 6 tons per year, and fish were old between 1500 and 2000 CFA (1 FCFA=0,0014 euros) per kg leading to an average annual income of less than 5 million CFA francs.
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SHINDE, ADITYA. "Design and Manufacturing of Solar Operated Automatic Fish Feeder System". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, nr 05 (9.05.2024): 1–5. http://dx.doi.org/10.55041/ijsrem33180.
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One of the most significant aqua cultural endeavors to date is fish farming. Traditionally, the majority of fish feeding is done by hand, requiring the transportation of people to the feeding location. Fish feeding by hand requires more work, money, and time. Following an extensive survey of farmers across various regions regarding their approaches to fish farming, the Auto Switch Food Feeder, which utilizes new technologies to replace traditional farming methods, will automate farming practices. The design of the solar-powered fish feeder will be based on certain parameters, such as the capacity of the culture tank, stocking density, fish biomass, and feed diameter. Additionally, a user-friendly interface that is compact and convenient for farming will be designed. In the current project, user interface design and timing controls are applied to automate feeding methods, which will significantly save labor costs and efforts while improving the quality of fish feeding. Key Words: Fish Farming, Automatic feeding, automation etc.
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Малыгина, Валентина, Ксения Антошина i Татьяна Гончарова. "О развитии рыбного хозяйства Донецкой Народной Республики путем организации рыбоводства речных рыб". ИЗВЕСТИЯ ДАЛЬНЕВОСТОЧНОГО ФЕДЕРАЛЬНОГО УНИВЕРСИТЕТА. ЭКОНОМИКА И УПРАВЛЕНИЕ, nr 3 (2020): 87–97. http://dx.doi.org/10.24866/2311-2271/2020-3/87-97.
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В статье раскрыта необходимость развития рыбного хозяйства Донецкой Народной Республики (далее – ДНР) путем организации рыбоводства речных рыб, пояснены причины трансформации потребительского рынка пищевых продуктов в сегменте рыбы и рыбных товаров, приведена характеристика технологий и способов разведения рыбы, проведены расчеты стоимости одного килограмма рыбы, выращенной экстенсивным и полуэкстенсивным способами. The paper discloses the necessity to develop the fisheries in the Donetsk People's Republic by organizing river fish farming, explains the reasons for the consumer food market transformation in the segment of fish and fish products, describes the technologies and methods of the fish farming, calculates the cost of one kilogram of fish raised by extensive and semiextensive methods. Fisheries, as a type of entrepreneurial activity, will not bring instant profit, and even under the best conditions it can be in two to five seasons (it all depends on the growth rate and value of the breed). To have the income every season, with extensive fish farming, fry will have to be launched into the pond every year until the first year’s youngsters become sexually mature and begin to reproduce themselves. To develop the fisheries, a proposal was made to create a laboratory for analyzing and confirming the quality of fish products in the Novoazovsky district, quotas for fishing, issues of amending the existing regulations and developing the new ones in the fisheries, as well as certain aspects of the fishermen interaction with the regulatory authorities and state enterprises.
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Tulli, Francesca, José M. Moreno-Rojas, Concetta Maria Messina, Angela Trocino, Gerolamo Xiccato, José M. Muñoz-Redondo, Andrea Santulli i Emilio Tibaldi. "The Use of Stable Isotope Ratio Analysis to Trace European Sea Bass (D. labrax) Originating from Different Farming Systems". Animals 10, nr 11 (5.11.2020): 2042. http://dx.doi.org/10.3390/ani10112042.
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This study aimed to determine whether isotopic ratio mass spectrometry (IRMS) can discriminate farmed European sea bass according to different farming systems and geographic origins. Dicentrarchus labrax of commercial size from three different rearing systems (concrete tank inland, sea cages, and extensive methods in valleys or salt works) were collected at the trading period (autumn–winter). For each farming type, different locations spread over Italy were monitored. Once the fish were harvested, the muscle and feed were sampled. For both muscle and feed, δ13C and δ15N were measured by continuous flow elemental analyzer isotope ratio mass spectrometry (CF-EA-IRMS) with the goal of discriminating samples based on the rearing system. Additional δ2H and δ18O measurements of fish samples were performed by continuous flow total combustion elemental analyzer isotope ratio mass spectrometry (CF-TC/EA-IRMS) to track the geographical origin. The measurements of δ13C and δ15N made it possible to discriminate cultured sea bass from different farming systems (extensive vs. intensive) reared at different geographical sites in Italy. Additional information was obtained from δ18O and δ2H, which enabled the geographical areas of origin of the sea bass farmed extensively and intensively (in cages) to be distinguished.
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Hungria, Anderson Paixão, Monique Damasceno Pinto, Antônia Rafaela Gonçalves Macedo, Osnan Lennon Lameira Silva, Regiara Croelhas Modesto, Lenilton Alex de Araujo Oliveira, Lian Valente Brandão i Fabricio Nilo Lima da Silva. "Understanding the Abandonment of Aquaculturists: A Case in the Amazon (North of Brazil)". Aquaculture Journal 4, nr 3 (14.08.2024): 148–62. http://dx.doi.org/10.3390/aquacj4030011.
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Despite the huge potential of aquaculture in the Amazon, several producers have abandoned the activity due to a lack of assistance, technology, and innovation. Thus, the objective of this study was to identify factors that have contributed to the withdrawal of aquaculturists from the municipality of ‘Vigia de Nazaré’, state of Pará (Northern Region of Brazil). This case study took place in 2022 through a quanti-qualitative survey, applying structured questionnaires to former aquaculturists. A total of 30 fish farms were investigated, with 11 of them being abandoned. They are distributed across 10 rural communities that have developed fish farming, with ‘Vila de Itapuá’ (18.2%) being the most representative. When active, fish farming was practiced by men (100%) aged between 51 to 60 years (54.5%) with an incomplete primary education (100%), who carried out the activity for an average of 5 years (81.8%), quitting fish farming between the years 2019 and 2020 (72.7%). All former aquaculturists owned small properties, with excavated ponds in an extensive system and used family labor. The absence of technical assistance and the high cost of feed were pointed out as the main problems in the production chain. It is worth noting that the monoculture of Tambaqui (Colossoma macropomum) accounted for 63.6% of the species produced in rural communities. In conclusion, former aquaculturists express the desire to return to fish farming due to its socio-economic importance. For this, government actions supporting technical assistance and advanced studies in fish nutrition by educational, research, and extension institutions are necessary.
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Martins, Williane Maria de Oliveira, Márcia Cristina Nascimento Justo, Melissa Querido Cárdenas i Simone Chinicz Cohen. "Seasonality of parasitic helminths of Leporinus macrocephalus and their parasitism rates in farming systems in the Amazon". Revista Brasileira de Parasitologia Veterinária 26, nr 4 (9.11.2017): 419–26. http://dx.doi.org/10.1590/s1984-29612017062.
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Abstract The objective of the present study was to analyze the seasonality of parasitic helminths of Leporinus macrocephalus from fish farms in the municipality of Cruzeiro do Sul, Acre, Brazil, and their parasitism rates. Between June 2014 and March 2015, 200 specimens were sampled from two fish farms: one with a semi-intensive system and the other with an extensive system (100 fish from each farm: 50 during the dry season and 50 during the rainy season). Fifteen species of parasites were found, with seasonal variations of some according to the farming system. In the semi-intensive fish farm, there was greater prevalence of infection during the dry season. Also, Urocleidoides paradoxus, Procamallanus (Spirocamallanus) inopinatus, Goezia leporini and Rhabdochona (Rhabdochona) acuminata presented differences in their parasitism rates between the seasons. In the extensive fish farm, no variation in the prevalence of infection was observed between the seasons and two species Tereancistrum parvus and G. leporini demonstrated differences only regarding the mean intensity of infection. The data presented here may help fish farmers to understand the parasite dynamics of L. macrocephalus in farming systems during the dry and rainy seasons in the state of Acre.
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Kumara, H. K. R. S., K. S. S. Atapaththu, S. S. Herath, N. P. Vidanapathirana i M. M. K. I. Marasinghe. "Exploring Ecological Functions of Rice-Fish Integration in the Agricultural Landscape: A Review to Investigate Feasibility of Implementing Rice-Fish Integration in Sri Lanka". Journal of Agro-Technology and Rural Sciences 3, nr 2 (7.06.2024): 24–35. http://dx.doi.org/10.4038/atrsj.v3i2.53.
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Rice-fish integration is, a symbiotic farming system where fish are reared in rice fields. Although this farming method widespread in many Asian countries, it is relatively new to Sri Lanka, and consequently information on its ecological functions under Sri Lankan context is scarce. Therefore, detailed investigation on the ecological function of rice fish integration would provide necessary information to establish rice-fish integration in Sri Lanka. This study followed a qualitative case study approach, including literature review and extensive document analysis. The results highlighted the rice-fish integration approach presents an array of ecological functions, underscoring its potential as a sustainable agricultural practice. Ecologically, the presence of fish in the system contributes to increase nutrient availability for rice plants, and biologically control weed and pest. Further, rice-fish integration promotes soil fertility of rice fields which improves growth and nutrient uptake of rice plants. The rice plants, in turn, play a pivotal role to maintain biodiversity in rice fields through water purification, establishing optimal water temperature conditions, and providing an array of micro habitats for a diverse aquatic fauna and flora. On the other hand, rice fish integration promotes water use efficiency, higher economic return and animal protein requirement of local farming communities. Considering ecological, economical and health benefits, integration of tilapia fish with suitable rice varieties available in Sri Lanka is proposed. In conclusion, the rice-fish integration is an ecologically balanced farming system which has a potential to enhance the sustainability of rice field farming systems in Sri Lanka.
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GIRARD, Léo, Alexander WEZEL i Joël ROBIN. "Drying out fish ponds, for an entire growth season, as an agroecological practice: maintaining primary producers for fish production and biodiversity conservation". Open Research Europe 3 (18.08.2023): 125. http://dx.doi.org/10.12688/openreseurope.16363.1.
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Agroecology largely focusses on terrestrial agroecosystems, but it can also be applied to fish farming. Indeed, ponds are typically used for fish production in Europe, but are also important reservoirs of biodiversity. Numerous studies demonstrate that both fish production and biodiversity are strongly determined by human management. One key practice in extensive fish farming, although more rare in Europe, is to dry out ponds. They are left dry for a complete year after several years of fish production. However, the extent to which this practice affects the functioning of the ecosystem, its biodiversity and fish production remain unclear. We investigated data from 85 fish ponds in the Dombes region, France, sampled between 2007 and 2014. We related variation in key abiotic characteristics to the time since last dry out. The dataset included organic matter content in pond sediments and concentrations of inorganic nitrogen and phosphorus in the water column, and biotic components such as macrophytes cover and richness, phytoplankton concentration and richness, macroinvertebrates density, and fish yield. Our results show that drying out facilitates the mineralization of organic matter in sediments and results in higher concentrations of inorganic nitrogen in the water column. Macrophytes cover is highest during the first year after drying out, and gradually declines after at the expense of increasing phytoplankton concentration. The diversity of both is highest in the first year after drying out and declines rapidly, especially for macrophytes. Fish yield is at its maximum in the second year. Drying out fish ponds appears to be an important agroecological practice in extensive fish farming with an application every three to four years. By nutrient recycling, this practice has a positive impact on the balance between primary producers and indirectly on the whole food web during two years. It optimizes fish production and allows biodiversity conservation.
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GIRARD, Léo, Alexander WEZEL i Joël ROBIN. "Drying out fish ponds, for an entire growth season, as an agroecological practice: maintaining primary producers for fish production and biodiversity conservation". Open Research Europe 3 (15.10.2024): 125. http://dx.doi.org/10.12688/openreseurope.16363.2.
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Agroecology largely focusses on terrestrial agroecosystems, but it can also be applied to fish farming. Indeed, ponds are typically used for fish production in Europe, but are also important reservoirs of biodiversity. Numerous studies demonstrate that both fish production and biodiversity are strongly determined by human management. One key practice in extensive fish farming, although more rare in Europe, is to dry out ponds. They are left dry for a complete year after several years of fish production. However, the extent to which this practice affects the functioning of the ecosystem, its biodiversity and fish production remain unclear. We investigated data from 85 fish ponds in the Dombes region, France, sampled between 2007 and 2014. We related variation in key abiotic characteristics to the time since last dry out. The dataset included organic matter content in pond sediments and concentrations of inorganic nitrogen and phosphorus in the water column, and biotic components such as macrophytes cover and richness, phytoplankton concentration and richness, macroinvertebrates density, and fish yield. Our results show that drying out facilitates the mineralization of organic matter in sediments and results in higher concentrations of inorganic nitrogen in the water column. Macrophytes cover is highest during the first year after drying out, and gradually declines after at the expense of increasing phytoplankton concentration. The diversity of both is highest in the first year after drying out and declines rapidly, especially for macrophytes. Fish yield is at its maximum in the second year. Drying out fish ponds appears to be an important agroecological practice in extensive fish farming with an application every three to four years. By nutrient recycling, this practice has a positive impact on the balance between primary producers and indirectly on the whole food web during two years. It optimizes fish production and allows biodiversity conservation.
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Pilin D.V., Tumenov A.N., Tuleuov A.M., Oskina A.A., Bulekov N.U. i Dnekeshev A.K. "Use of data on zoobenthos reserves of fishless reservoirs to assess potential production of bentophage fish similar small reservoirs of north-west Kazakhstan". Novosti nauki Kazahstana, nr 3 (30.09.2022): 39–45. http://dx.doi.org/10.53939/15605655/2022_3_39.
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The potential fish productivity of four fishless reservoirs of Western Kazakhstan is estimated for subsequent use in fish farming calculations on similar fishery reservoirs of the region. Potential fish production was determined by the biomass of feed zoobenthos. In parallel the productivity of carp as main object of extensive aquaculture was evaluated in the lake-commercial fish farms. The obtained values of potential fish production in the reservoirs deprived of ichthyofauna equaled to 72 kg per ha for the reservoirs of West Kazakhstan and 37 kg per ha for the Aktobe region. The productivity of carp grown in extensive aquaculture in the West Kazakhstan region in the first year of cultivation amounted to 75 kg per ha.
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Farhaduzzaman, A. M., Md Suzan Khan, Mahadi Hasan Osman, Md Neamul Hasan Shovon, Mehedi Azam i Niaz Makhdum. "Progress of seabass, Lates calcarifer (Bloch, 1970) culture in Bangladesh: Field-level updates from the Bhola and Satkhira Districts". International Journal of Agricultural Research, Innovation and Technology 12, nr 2 (24.01.2023): 117–25. http://dx.doi.org/10.3329/ijarit.v12i2.64097.
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Since the high market value of seabass, Lates calcarifer (Bloch, 1970), mainly found in Bangladesh's coastal waters and tidal rivers of Bangladesh, farmers in those areas cultivate it alongside carp fish in ponds and shrimp farms. Even though farming began many years ago, progress in overcoming obstacles of only natural sources for hatchlings, supplemental feeding, and knowledge on advanced farming management in seabass farming at the field level has been prolonged. This study discusses the current farming and trading of seabass in Bangladesh's coastal districts. Seabass fry is collected from rivers and estuarine areas, grown in hatcheries or ponds, and sold to farmers in large sizes. Some farmers cultivate this fry in mixed fish culture ponds in the extensive method; some farmers cultivate them with carp fish in a semi-intensive method. Seabass feeds only live feed (Tilapia and carp fishes fry); continuous supply is difficult and expensive. In these ponds, seabass is cultivated in the traditional method in 18–20 months, weighing 7-8 kg, and in the advanced traditional method in 1 year, weighing 2-3 kg. The profit percentage of seabass farming with the semi-intensive method is 77.42%. To expand this profitable fish farming, it is crucial to acclimate the fish to induced breeding and supplemental food. The institutions involved should not work in isolation but rather collaborate on developing induced breeding techniques and expanding seabass farming. In this case, prosperous seabass farming countries' experience can be applied. Int. J. Agril. Res. Innov. Tech. 12(2): 117-125, December 2022
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VATSOS (Ι.Ν. ΒΑΤΣΟΣ), I. N., i P. ANGELIDIS (Π. ΑΓΓΕΛΙΔΗΣ). "Water quality and fish diseases". Journal of the Hellenic Veterinary Medical Society 61, nr 1 (13.11.2017): 40. http://dx.doi.org/10.12681/jhvms.14875.
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Certain water quality parameters are known to cause serious problems to fish, especially when they are living under intensive farming conditions. These problems range from discomfort of fish to heavy mortalities and factors, such as the fish species, the time and level of exposure and the synergic effect of other coexisting stressful conditions, play an important role. In addition, when these parameters are outside the preferable for each fish species range, they can induce stress to fish, compromising their immune system and making them vulnerable to many opportunistic pathogens. Oxygen is, probably, the main limiting factor under farming conditions and when its levels are below the preferable range for any fish species, many morphological, as well as physiological alterations develop. Increased levels of carbon dioxide in the water usually coexist with decreased levels of oxygen and can cause respiratory acidosis and nephrocalcinosis. The latter is characterized by the development of granulomas in many internal organs and urolithiasis. Ammonia usually causes problems under intensive farming conditions, especially when the wateris recirculated and the pH is high. Increased levels of ammonia in the water can cause extensive alterations in the gills and degenerative changes in the liver and kidney. Gas supersaturation of the water, depending on the level of saturation and the time of exposure, can result in the gas bubble disease. Formation of bubbles in the eyes, skin and gills and extensive necrotic areas inmany organs due to gas emboli are the main findings caused by this disease. Many contaminants in the water can, also, create serious problems to fish. Fin erosion, epidermal hyperplasia or papilloma and degenerative and necrotic alterations in many internalorgans are common findings observed in fish on many cases of water pollution. Many of the factors mentioned above, as well as others, such as nutrition and bad management, can result in abnormal development of the body offish, when exposed at their early life stages. Due to farming conditions, cultured fish tend to exhibit increased rate of body malformation compared to wild ones. Careful design of the facilities, use of specialized equipment and, probably, application of genetic selection program can minimize or even eliminate the effects these water parameters have on the cultured fish.
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Kolek, Ludmiła, Maciej Pilarczyk, Michał Inglot, Bartłomiej Stonawski i Joanna Szczygieł. "Observations of carbon-nitrogen manipulation and periphyton growth stimulation on fish farming in an integrated intensive-extensive aquaculture system". Fisheries & Aquatic Life 27, nr 4 (1.12.2019): 169–77. http://dx.doi.org/10.2478/aopf-2019-0019.
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Abstract The results of observations of intensive sturgeon production integrated with an extensive earthen fish pond are described. The main objective of the study was to show how technological modifications applied to enhance nitrogen assimilation in ponds and nutrient retention in aquaculture products influenced fish production. Each of two integrated systems, A and B, consisted of four intensive fish tanks stocked with sturgeon and one extensive carp pond stocked with carp (Cyprinus carpio L.), silver carp (Hypophthalmichthys molitrix (Val.)) and common nase (Chondrostoma nasus L.). The fish tanks were supplied with water from the extensive pond and the effluent from the tanks was discharged into the same pond, which acted as a biological filter for fish production. System B pond was supplemented with carbohydrates (methanol) and plastic substrates for periphyton development that were installed to increase nutrient utilization. The results of the observations showed better water quality and higher fish production in pond B, but no differences were noted in sturgeon growth performance in system A. The combination of these modifications appeared to be an efficient way of increasing nutrient retention and improving water quality.
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Perez, Liliana, Yenny Cuellar, Jorge Gibbons, Elias Pinilla Matamala, Simon Demers i Juan Capella. "Mapping the Future: Revealing Habitat Preferences and Patterns of the Endangered Chilean Dolphin in Seno Skyring, Patagonia". Biology 13, nr 7 (10.07.2024): 514. http://dx.doi.org/10.3390/biology13070514.
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Species distribution modeling helps understand how environmental factors influence species distribution, creating profiles to predict presence in unexplored areas and assess ecological impacts. This study examined the habitat use and population ecology of the Chilean dolphin in Seno Skyring, Chilean Patagonia. We used three models—random forest (RF), generalized linear model (GLM), and artificial neural network (ANN)—to predict dolphin distribution based on environmental and biotic data like water temperature, salinity, and fish farm density. Our research has determined that the RF model is the most precise tool for predicting the habitat preferences of Chilean dolphins. The results indicate that these dolphins are primarily located within six kilometers of the coast, strongly correlating with areas featuring numerous fish farms, sheltered waters close to the shore with river inputs, and shallow productive zones. This suggests a potential association between dolphin presence and fish-farming activities. These findings can guide targeted conservation measures, such as regulating fish-farming practices and protecting vital coastal areas to improve the survival prospects of the Chilean dolphin. Given the extensive fish-farming industry in Chile, this research highlights the need for greater knowledge and comprehensive conservation efforts to ensure the species’ long-term survival. By understanding and mitigating the impacts of fish farming and other human activities, we can better protect the habitat and well-being of Chilean dolphins.
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Frejus, Ehui Edi Jean, Kouassi Kouassi Clément, Kouassi Kra Athanase i Ehouman Ano Guy Serge. "Specific Diversity of Fish Ponds in the Haut-sassandra and Risks of Contamination by Potential Pathogens among Oreochromis niloticus (Tilapia)". Asian Journal of Fisheries and Aquatic Research 26, nr 3 (23.03.2024): 76–86. http://dx.doi.org/10.9734/ajfar/2024/v26i3748.
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Fishery and aquaculture products are an important source of protein in the human diet and a real source of income for producers. However, fish farming is still less well known among the Ivorian population, and does not yet benefit from technical assistance. This could have an impact on the quality of aquaculture resources. This study was therefore carried out firstly to assess the current state of fish farming in the Haut-Sassandra region, and then to evaluate contamination by potential bacterial pathogens of tilapia fish from fish ponds in this region. To this end, a survey was carried out from June to December 2022 using questionnaires. The survey consisted of direct interviews and farm visits to collect data. Tilapia fish were then sampled and analyzed. It emerged that fish farming is a fast-growing activity in the Haut-Sassandra region, but is practiced in a related way. It is mostly practiced by people aged between 35 and 50, most of whom have a primary education. Females account for 2.66%. The dominant system is extensive, practiced in dam and diversion ponds where several activities coexist. In this region, 100% Tilapia (Oreochromis niloticus), 21% Cameroon (Heterotis niloticus) and 48% Catfish (Clarias gariepinus) are found on all farms. Of the two pond types, the barrage ponds had the best characteristics. Microbiological analyses revealed the presence of potentially pathogenic species, notably Escherichia coli, Staphylococcus aureus Salmonella spp and Enterococcus in tilapia from these fish ponds. Fish farming is a fast-growing activity, but it needs special attention to meet the needs of the Ivorian population.
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Hinneh, Mandela Klon-Yan, Mbeva D. Liti i Geraldine Matolla. "Characterization of Nile Tilapia (Oreochromis niloticus) Farming Intensities in Liberia". Aquaculture Journal 2, nr 3 (18.07.2022): 203–15. http://dx.doi.org/10.3390/aquacj2030011.
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Fish farming is a rapidly growing food sector in developing nations. Liberia is an example of a least developed country with a large population facing high poverty levels. This has led to the adoption of aquaculture as one of the most important strategies for solving malnutrition and food security problems. However, since the introduction of fish farming, fish yields have been persistently low. To address the shortcomings in fish yields in Liberia, a study was conducted to provide information on fish farming intensities, types, and quality of feeds used by farmers in the culture of O. niloticus in Bong, Lofa, Nimba, and Grande Gedeh counties. Using stratified purposive sampling, 120 farmers were interviewed, and their fish feeds were sampled for proximate nutrient analyses. The results demonstrated that fish farming of O. niloticus in Liberia is mostly semi-extensive (81.6%), mainly practiced in paddy, barrage, and earthen ponds. On average, farmers produce 165.7 kg ha−1 of O. niloticus annually, translating to USD 414.25. Farmers use mixed feeding regimes, comprising farmer-made, kitchen waste, and blended commercial feeds. Farmers, on average, spend 43% of their operation cost on feeds, which makes it unsustainable to maintain semi-intensive systems. The main feed ingredients used by Liberian fish farmers are rice bran, wheat bran, corn, palm kernel, and fishmeal. Crude protein levels in feed ingredients are as follows: rice bran (3.7 ± 1.3%), wheat bran (16.4 ± 1.5%), corn (6.3 ± 1.1%), palm kernel cake (14.8 ± 1.4%), and fishmeal (63.8 ± 1.3%). Crude proteins were low in formulated feeds, ranging from 8–15% CP. From this study, poor yields and the slow growth of O. niloticus can be attributed to low-protein diets, rendering farming ventures unprofitable and unsustainable for resource-poor farmers in Liberia.
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Bambi Langa, Lydie, Soleil Wamuini Lunkayilakio, Patrick Mafwila Kinkela, Vincent Gennotte i Carole Rougeot. "Fish Farming Activities in Mbanza-Ngungu: Farmer Socio-Professional Profiles, Production Practices, and Improvement Opportunities for Sustainable Aquaculture". Sustainability 16, nr 17 (29.08.2024): 7481. http://dx.doi.org/10.3390/su16177481.
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The study describes the distribution of fish farming activities, identifies and characterizes the stakeholders involved, and assesses their level of knowledge and the techniques used for fish farming in the Territory of Mbanza-Ngungu. Furthermore, it proposes avenues to improve the sustainability and profitability of the sector. The methodology relied on a snowball approach to recruit a representative sample of 350 fish farmers. Field visits allowed for detailed data collection through a specially designed questionnaire. The data were analyzed using statistical methods (chi-square test of independence) to identify trends and challenges across the sectors of the territory of Mbanza-Ngungu. The findings revealed that fish farming activities are distributed across the territory of Mbanza-Ngungu, with a male predominance (96%) among fish farmers and a growing trend of this activity among older individuals over 40 years old (48%). Additionally, the results demonstrate that aquaculture is mainly a secondary activity for 97% of respondents, yet it could play a pivotal role in household economic diversification. The study identifies predominant practices, such as extensive farming (89%) and monoculture (92%), while highlighting gaps in pond management and fish farmers’ general knowledge. Challenges are mainly related to feed access (28%), financing (27%), training (23%), and water quality monitoring (100%). The commercial orientation of production towards sales (94%) rather than self-consumption offers an opportunity to improve this sector in this territory. Finally, recommendations are made to enhance the sustainability and profitability of aquaculture in the region, including promoting integrated practices, more efficient pond management practices, and aquaculture product processing.
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Jansen, Peder A., Anja B. Kristoffersen, Hildegunn Viljugrein, Daniel Jimenez, Magne Aldrin i Audun Stien. "Sea lice as a density-dependent constraint to salmonid farming". Proceedings of the Royal Society B: Biological Sciences 279, nr 1737 (8.02.2012): 2330–38. http://dx.doi.org/10.1098/rspb.2012.0084.
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Fisheries catches worldwide have shown no increase over the last two decades, while aquaculture has been booming. To cover the demand for fish in the growing human population, continued high growth rates in aquaculture are needed. A potential constraint to such growth is infectious diseases, as disease transmission rates are expected to increase with increasing densities of farmed fish. Using an extensive dataset from all farms growing salmonids along the Norwegian coast, we document that densities of farmed salmonids surrounding individual farms have a strong effect on farm levels of parasitic sea lice and efforts to control sea lice infections. Furthermore, increased intervention efforts have been unsuccessful in controlling elevated infection levels in high salmonid density areas in 2009–2010. Our results emphasize host density effects of farmed salmonids on the population dynamics of sea lice and suggest that parasitic sea lice represent a potent negative feedback mechanism that may limit sustainable spatial densities of farmed salmonids.
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Kurbonov, R., A. Urinov, I. Nosirov, A. Mamazhonov, I. Abdullaev, M. Mamatkulov, S. Mirzaboboeva i A. Khalimov. "CREATION OF WATER CIRCULATION SYSTEMS AS A FACTOR OF ECONOMIC EFFICIENCY OF INDUSTRIAL FISHERIES". Journal of Science and Innovative Development 4, nr 3 (30.06.2021): 41–53. http://dx.doi.org/10.36522/2181-9637-2021-3-4.
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The analysis of the fishery companies of the republic shows that the main drawback in the fishing industry is the small volume of mass rearing of fish fry and the ineffective use of artificial groundwater reservoirs both – built in the 60-80s of the last century and those currently under construction. Due to the inappropriate size of the surface of these lakes, about 50-100 hectares, and insufficient depth in the ponds, small quantities of carp (2000-3000 units) are bred, large-scale repairs are being carried out, and the fish catch per pond with an area of 1.0 hectares is 1,0-3.0 tons, which, in turn, requires a large amount of water, mineral fertilizers and animal feed. The Innovative Fishery Center under the Fergana State University explores favorable hydro biological conditions for intensive fish farming, with an account of the climate of the republic, without the use of aerators, by organizing the circulation of water in the pond water, in order to provide fish bred in the reservoir with a sufficient amount of oxygen, considering the insufficient surface of the area (0.5-1 hectares – ponds with artificial soil, up to 1.5 hectares – natural reservoirs). As a result of carp care in poly culture, fish productivity is increased by 3-4 times as compared to the method of extensive fish farming.
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ORFANIDIS, S., N. STAMATIS, V. RAGIAS i W. SCHRAMM. "Eutrophication patterns in an eastern Mediterranean coastal lagoon: Vassova, Delta Nestos, Macedonia, Greece". Mediterranean Marine Science 6, nr 2 (1.12.2005): 17. http://dx.doi.org/10.12681/mms.183.
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The results of an intensive monitoring study of main eutrophication parameters in relation to fish farming management, climate and hydrography in the Vassova coastal lagoon (Nestos Delta) are presented. The overall aim is to produce basic knowledge in order to contribute to the management of eutrophication of coastal lagoons at local and national levels. Due to extensive spatiotemporal variability of the measured parameters correlation and regression polynomial analysis was used to identify patterns (p<0.05). Freshwater was the main source of nitrate and phosphate in the lagoon. This finding has justified the reduction of freshwater inflow in the past, which, however, has increased mean salinity to 30 PSU and reduced spatial salinity gradients. Maximum nitrate values in winter coincided with adverse climatic and hydrographic conditions (high precipitation, strong NE to E winds and low tide) and fish farming management that hinder water circulation. Dissolved phosphorus variability indicated the combination of the external (freshwaters) and internal (sediment) P-sources. N/P water values indicated nitrogen being the most important nutrient for primary producers throughout the year, except in winter, when phosphorus was the most important nutrient. Practical measures for improving fish farming practices to decrease “eutrophication risk” during winter are suggested. Existing nutrient data from the Vassova and from other Greek lagoons in comparison were also presented and discussed.
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Pena, Ramon Wagner Torres, Pedro Andrés Chira Oliva i Fernando Araújo Abrunhosa. "Application of the Ground Penetrating Radar (GPR) and Electromagnetic (EM34-3) Geophysical Tools and Sedimentology for the Evaluation of the Subsurface of Sites Earmarked for Aquaculture Ponds in the Amazon Region of Northern Brazil". Applied Sciences 13, nr 19 (9.10.2023): 11107. http://dx.doi.org/10.3390/app131911107.
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The present study evaluated the application of Ground Penetrating Radar and Electromagnetic Induction geophysical tools combined with sedimentology for the description of the subsurface of sites destined for the installation of ponds for an extensive freshwater fish farming system. Two areas with similar topographic characteristics (flat land near bodies of water) were investigated in the Amazon region of northern Brazil: Area 1—the future site of an aquaculture research center, and Area 2—an established fish farming operation. These tools performed well in the evaluation of the suitability of the terrain for the installation of aquaculture ponds. The application of these tools can, thus, be recommended for aquaculture projects, given that it provides advanced knowledge on the characteristics of the local soils, which is extremely important to guarantee the sustainability of any aquaculture operation. These data can help minimize the environmental impacts of the process, while maximizing the economic returns to the installation of an aquaculture operation.
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Utami, Latifa Alda, Ahmad Taufiq Maulana Ramdan, Fanji Wijaya i Dadan Abdul Aziz Mubarok. "Optimalisasi Pengembangan Bisnis pada Petani Ikan Ciparay". Jurnal Ilmu Sosial, Manajemen, Akuntansi dan Bisnis 5, nr 3 (1.08.2024): 405–26. http://dx.doi.org/10.47747/jismab.v5i3.1890.
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An essential strategic effort to improve community welfare and the productivity of the fishing industry is to optimize the development of fish farmer businesses in Ciparay, Bandung Regency, West Java, which has a lot of potential for cultivating freshwater fish. Fish farmers in this area, however, still face several problems. These include lack of access to advanced technology, knowledge about managing a business, and market limitations. This research aims to find and create the most effective strategy for building a fish farming business in Ciparay. This research uses SWOT analysis (Strengths, Weaknesses, Opportunities, and Threats) and Business Model Canvas to find internal and external elements influencing the fish farming business. Apart from field observations and in-depth interviews with fish farmers, data was collected through relevant literature studies. The results of the analysis show that traditional knowledge and extensive experience in fish cultivation are the main strengths of Ciparay fish farmers. In contrast, the main weakness is the difficulty of obtaining technology and capital. The ever-increasing market demand for fresh fish and government support through various aid programs are opportunities that can be exploited. However, there are threats such as climate change and competition with fish products from other countries. The results show that there are several methods that Ciparay fish farmers can use to maximize their business growth. First, increasing product diversification and innovation in fish processing can open up new market opportunities and increase product-added value. Second, increasing access to modern technology through training and technical assistance can help improve product quality and productivity. Third, forming farmer groups or cooperatives can strengthen farmers' bargaining positions and facilitate their access to capital and wider markets. Farmers can gain greater access to markets and capital by implementing stratification strategies
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Burgaz, M. I., T. I. Matviienko, O. M. Soborova, K. I. Bezyk i O. Y. Kudelina. "The current state of fishing and extracting the living aquatic resources in the Black Sea region of Ukraine". Ukrainian Journal of Veterinary and Agricultural Sciences 2, nr 3 (26.12.2019): 23–27. http://dx.doi.org/10.32718/ujvas2-3.06.
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The development of open spaces and resources of the Black Sea is one of the main directions of the Black Sea region (the Odessa, Mykolaiv and Kherson regions). The essence of the region policy allows to cooperate with the most countries of the world community and brings an income both to the budget of the regions and to the state budget. Industrial fisheries is an extractive branch of the fishing industry that uses the natural resources of the oceans, seas, lakes, rivers, reservoirs: various species of fish, marine mammals, shellfish, crustaceans and aquatic vegetation. Fisheries can be considered as one type of nature using which consists in the extraction of fish and other sea products (fish, invertebrates, algae, etc.). The purpose of the work was to find out a current state of fishing and extracting the living aquatic resources in the Black Sea region, namely in the Odessa, Mykolaiv and Kherson regions. An assessment of a current state of extracting the aquatic bioresources in general and in the inland water bodies in the Black Sea region, namely in the Odessa, Mykolaiv and Kherson regions for the period from 2010 to 2018, was carried out on the basis of specialized literature. The state of extracting the aquatic bioresources in general and in the inland water bodies from 2010 to 2018; the amount of caught fish in this region; the state of fisheries of the studied region were investigated. Fish farming is a branch of the national economy that is engaged in farming, increasing and improving a quality of the fish stocks in the water bodies and filling the fish resources. In order to maintain and increase the stocks of valuable industrial fish in our country the extensive measures for artificial fish farming, improving the conditions of natural reproduction of fish, as well as the development of lake and pond fisheries for the commercial fish production are being taken. Much work is being done to acclimatize valuable industrial fish species and other fishing objects, aimed at expanding a fish species composition and increasing the fish stocks. It was found that according to the statistics of the State Statistics Committee of Ukraine, the analysis of the exraction of fish and aquatic biological resources in the Black Sea region (Odesa, Mykolaiv and Kherson regions) showed that an increase in the volume of fish catching and extracting the living aquatic resources occurred only due to inland waters.
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Hamed, Farhan Yasin, Adelia Zakirovna Anokhina, Natalia Viktorovna Sudakova i Damelya Kazhigalievna Magzanova. "Modern features of aquaculture of cyprinids in the republic of Iraq". Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), nr 12 (1.12.2020): 6–14. http://dx.doi.org/10.33920/sel-12-2010-01.
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It is shown that the leading role in the aquaculture of Iraq belongs to Cyprinids, which account for over 80 % of all fish farming production. The most widespread in the country are four main world species of carp aquaculture: common carp (Cyprinus carpio), grass carp (Ctenopharyngodon idella), silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis). Basically, the traditional technology of growing Cyprinids in ponds is used, which includes the main fish farming processes: care of broodstock to prepare them for spawning, collecting eggs and milt, eggs fertilization and incubation of embryos, raising juveniles and marketable fish. Currently, there are about 2 thousand private fish farms, which have ponds of various sizes from 4 to 100 hectares. Cultivation of Cyprinids in Iraq is carried out mainly by extensive methods: the use of the natural food base of reservoirs with low fish stocking density in polyculture. The fish productivity of ponds varies greatly in different fish farms from 1,5 to 6 t/ha, which is due to economic reasons. The data on changes in the temperature of pond water during the year and hydrochemical indicators are given, which shows favorable conditions for Cyprinids rearing. Information on the use of compound feeds for growing carp in ponds is provided, and data on the composition and nutritional value of the feed used. The fish culture indicators for the main biotechnical processes of the rearing of four Cyprinid species in Iraq are described in detail. In the conclusion, it is indicated that for the effective development of aquaculture in Iraq, government support is needed in the form of a developed long-term program and legislative acts.
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Oh, Seoyeon, i Seunghyung Lee. "Fish Welfare-Related Issues and Their Relevance in Land-Based Olive Flounder (Paralichthys olivaceus) Farms in Korea". Animals 14, nr 11 (5.06.2024): 1693. http://dx.doi.org/10.3390/ani14111693.
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Korean aquaculture has expanded considerably in recent decades; however, this growth has often prioritized quantity over fish welfare. Therefore, we analyzed the aquaculture practices of olive flounder, the predominant species in Korean consumption and production, within the framework of fish welfare. We conducted extensive interviews and surveys across olive flounder farms in Jeju-do and Wando to examine prevalent issues impacting fish welfare in aquaculture. These issues include stressors, mass mortality events, and disease outbreaks, all of which strain the welfare of farmed fish. Moreover, our survey revealed farmers’ varying perceptions of fish welfare, highlighting the necessity for a cohesive approach. Accordingly, we propose recommendations to enhance fish welfare and establish a more sustainable aquaculture model in Korea. Ensuring fish welfare in aquaculture operations requires a comprehensive approach that considers the physiological and behavioral needs of fish throughout the farming lifecycle. By prioritizing fish welfare, Korean aquaculture can strengthen its growth while maintaining ethical standards and ensuring the well-being of farmed fish. This welfare-centric approach is crucial for the long-term sustainability and resilience of the Korean aquaculture industry. By addressing welfare concerns and promoting responsible practices, Korean aquaculture can foster an ethically sound and sustainable future.
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Thorne-Lyman, Andrew L., Natalie Valpiani, Rumana Akter, Md Abdul Baten, Sven Genschick, Manjurul Karim i Shakuntala H. Thilsted. "Fish and Meat Are Often Withheld From the Diets of Infants 6 to 12 Months in Fish-Farming Households in Rural Bangladesh". Food and Nutrition Bulletin 38, nr 3 (15.06.2017): 354–68. http://dx.doi.org/10.1177/0379572117709417.
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Background: Fish is a widely available animal-source food in Bangladesh and a rich source of nutrients, yet little is known about practices related to incorporating fish into the diets of infants and young children. Objective: Use dietary diversity data to explore consumption patterns of fish and high-quality food items within the household and examine factors associated with delayed introduction of fish to infants and young children. Methods: Cross-sectional survey of 496 households with children <36 months participating in the Aquaculture for Income and Nutrition project in Bangladesh. Data collected included household characteristics, women’s dietary diversity score, and minimum dietary diversity score along with data on Infant and Young Child Feeding practices. Results: Most children (63.4%) met the threshold for minimum dietary diversity. Despite having received extensive nutrition education related to including fish in complementary foods, only half of the caretakers introduced fish at 6 months and the mean age of introduction of small fish was 8.7 months. Meat and fish were not common in infant diets but increased with child age. Concerns about bones were a major barrier to incorporating fish into infant diets. Conclusion: Given its nutrient profile and widespread availability in certain contexts, fish could be an underutilized opportunity to improve nutrition and health outcomes of infants and young children. Further research, including utilizing food processing technologies, is needed to develop appropriate responses to overcome these barriers.
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Nguyen Thi, Kim Quyen, Van Hien Huynh i Thi Phuong Dang. "AN ANALYSIS OF TECHNICAL FACTORS AND FINANCIAL EFFICIENCY OF INTEGRATED IMPROVED EXTENSIVE SHRIMP FARMING SYSTEMS IN CA MAU PROVINCE, VIETNAM". TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 11, nr 48 (24.09.2022): 91–99. http://dx.doi.org/10.35382/tvujs.11.48.2022.1116.
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The study was conducted from May to September 2020 to evaluate technical factors and the financial efficiency of integrated shrimp farming models. Forty-five inte grated rice-shrimp rotation farming and fortyfive integrated mangrove-shrimp farming households in Ca Mau were subjects of the survey. The results show that farm sizes were relatively large (2.47-5.30 ha). Stocking density was 4.70 ind./m2 (shrimp-rice) and 17.8ind./m2 (mangrove-shrimp), reaching the productivity of 229.3 and 267.8 kg/ha/crop, respectively. Besides, the rice-shrimp model harvested 1.36 tons/ha/crop of rice and 11.8kg/ha/crop of crab. The mangrove-shrimp model could harvest 69.3kg/ha/crop of crab, 79.3 kg of wild shrimp and 73.5 kg of wild fish. The total production cost for the rice-shrimp model was 6.80 million VND/ha/crop, producing a profit of 33.4 million VND/ha/crop. The mangrove-shrimp model required a production cost at 19.9 million VND/ha/crop and brought a profit of 60.1 million VND/ha/crop. The productivity of shrimp was influenced negatively by stocking density, positivelyby cultured area (rice-shrimp model), and the ratio of forest area (for mangrove-shrimp model).
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NAIK, P. K., B. K. SWAIN i C. K. BEURA. "Duck production in India-A review". Indian Journal of Animal Sciences 92, nr 8 (22.08.2022): 917–26. http://dx.doi.org/10.56093/ijans.v92i8.118712.
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In India, the contribution of ducks for egg and meat production is next to chicken. There are many advantagesof duck production over chicken. The important available ducks in the country are few exotic breeds and locallyavailable indigenous ducks. Ducks can be reared under intensive, semi-intensive and extensive rearing system.However, in India, ducks are mostly reared in small flock size as subsidiary source of income. The major duck basedintegrated farming system are duck-fish, duck-rice and duck-rice-fish integrated farming system. Feed is the majorfactor in livestock and poultry production system as it accounts about 70-75% of the total cost of production. Tominimize the cost of production, many locally available alternate or unconventional feed ingredients, viz. azolla,cassava, broken rice are used for feeding of ducks. The constraints of duck farming are mainly the unavailability ofsuitable germplasm, scarcity in natural feed resources, drying of natural water bodies, difficulty in the availabilityof vaccines, poor marketing facilities, etc. In India, there is ample scope for duck production to meet egg and meatdemand of the country. Suitable duck breeds or varieties need to be developed for rural backyard duck farming.Comprehensive feeding packages along with scientific management practices for different types of ducks should beformulated for economic production of duck eggs and meat. There is a need for establishment of hatcheries and other infrastructures in rural areas to promote duck farming for sustainable livelihood of the people.
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Sugiarto, Muhammad Aqsha Rizki, Moh Muhtarom i Anindhiasti Ayu Kusuma Asri. "Implementasi Sistem Pemberian Pakan Ikan Hias Otomatis Menggunakan Esp32 Berbasis IoT (Internet of Things)". Jurnal Indonesia : Manajemen Informatika dan Komunikasi 5, nr 3 (20.09.2024): 2781–91. http://dx.doi.org/10.35870/jimik.v5i3.1008.
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This study aims to design and implement an automatic feeding system for ornamental fish using Internet of Things (IoT) technology, with the ESP32 microcontroller and servo motor. Given Indonesia's extensive water resources and the importance of its fisheries sector, ornamental fish farming has gained significant popularity. Fish owners often struggle with providing timely and consistent feeding. IoT technology offers an effective solution through remote connectivity. The developed system utilizes the Blynk application to schedule and monitor aquarium conditions in real-time. Test results indicate that the integration of ESP32 and the servo motor functions effectively, enabling scheduled automatic feeding. The system was tested and found to operate punctually, supporting a consistent daily feeding cycle. This study contributes to the advancement of innovative solutions in aquaculture, particularly in the application of IoT technology for more efficient and effective aquarium management.
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Ayoola, Simeon. "Sustainable Fish Production in Africa". African Journal of Food, Agriculture, Nutrition and Development 10, nr 5 (14.06.2010): 1–9. http://dx.doi.org/10.18697/ajfand.35.cy017.
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Fish farming is today considered an important source of production for meeting world’s increasing demand for protein. Fish is an important source of good quality protein required in human diet. It has the highest level of easily metabolisable high quality protein, fats, vitamins, calcium, iron and essential amino acids when compared with other sources of animal protein such as poultry and beef. Fish consumption is highly relished among people of all classes and ages in that the fish is less tough and more digestible when compared to beef, mutton chicken and bush meat. This is due to the greater ratio of muscle protein to connective tissue protein in relation to other animals. Fish possesses excellent amino acid balance with high digestibility percentage of about 87 – 98% compared to 87 – 90% recorded for beef and poultry. In addition, fish is very important to the developing world population as it is the major source of cheap high quality animal proteins which are very vital for healthy development. Fish production is relatively inexpensive when compared with other sources of animal protein such as cattle, pig and poultry. In view of the facts that most of the health related problems in developing world such as abnormal development, reduction in human productivity, high incidence of infant mortality, malnutrition and diseases have been attributed to low intake of good quality animal protein, this has made production of fish very imperative to the good health of the nations in the developing world. Fish farming has a lot of potentials to sustainable development. Fish as a source of rich food for the poor can play a crucial role in improving the food security and nutritional status of the millions of the people in Africa and other developing part of the world. The present low level of fish production in Africa can be increased sustainatially by adapting a technological shift from extensive to intensive system of production as is the trend in developed countries.
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Shtynda, L. Y., Yu V. Loboiko i B. S. Barylo. "Technological parameters of carp growing (Cyprinus carpio) at different stocking densities". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 25, nr 99 (5.09.2023): 3–8. http://dx.doi.org/10.32718/nvlvet-a9901.
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This article presents a study of the technology of growing carp (Cyprinus carpio) using different stocking densities in feeding ponds. Carp is one of the most common and essential freshwater fish species for commercial farming and consumption. The study was conducted over several months, with an assessment of carp's growth, survival, and productivity when using different stocking densities in feeding ponds. Different stocking densities included low (sparse), medium, and high (dense) carp individuals per unit area. To experiment, four groups of carp individuals were kept in feeding ponds at different stocking densities from 2,000 to 3,500 specimens per hectare of water area. Using extensive planting material of carp with an average weight of 55 g makes it possible to obtain commercial carp with an average weight of 485 g to 650 g during a two-year cycle of cultivation in the conditions of the second fish farming zone without reducing fish production. At the same time, the largest concentration of carp was obtained in a pond with sparse planting of annuals – 2.0 thousand specimens/ha. An increase in the planting density of yearlings of carp to 3.5 thousand units/ha led to a decrease in the average daily weight of two-year-old carp to 510 g while maintaining a high fish production of 1122 kg/ha. At the same time, a hydrochemical analysis was carried out in the ponds, and the amount and biomass of the natural feed base (phyto-, zooplankton, and zoobenthos) were determined. The analysis of the research results indicates that the stocking density of carp has a significant impact on its productivity. The sparse stocking conditions promoted more significant growth and better development of the fish, which may be due to less competition for food and space. On the other hand, high stocking density led to a slight decrease in growth and did not affect survival and fish productivity. The results of this study have practical applications for fish farms engaged in the cultivation of carp. They emphasize the importance of an optimal balance between the number of fish, the availability of natural feed, and the area of the feeding ponds in order to achieve maximum growth and productivity with minimum costs of keeping and feeding the fish. Such research will help improve fish farming technologies and optimize production processes to ensure sustainable and efficient development of the industry.
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ASHRAFULLAH, MD, MITHUN KARMAKAR, SHAYLA SULTANA MELY, MD TARIQUL ISLAM i MD SHARIFUL ISLAM. "Integrated farming of stinging catfish (Heteropneustes fossilis) and rabbit (Oryctolagus cuniculus) in farmer’s pond". Bangladesh Journal of Fisheries 35, nr 1 (30.06.2023): 25–33. http://dx.doi.org/10.52168/bjf.2023.35.03.
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A study was carried out to evaluate the growth and production performances of stinging catfish (Heteropneustes fossilis) and rabbit (Oryctolagus cuniculus) under two treatments such as T1 (shing-rabbit integrated system) and T2 (shing monoculture) in farmers’ pond. Twelve ponds from two villages such as Sutiakhali and Salakandi under Mymensingh sadar upazila were selected for the study. The average pond size was 5.5±0.23decimal with a stocking density of 600 shing dec-1. The ponds were only fertilized with rabbit dung except at the time of pond preparationat a rate of 1 kg dec-1. Various environmental parameters such as temperature (oC), transparency (cm), PH, dissolve oxygen (mg L-1), PO4-P (mg L-1), NO3-N (mg L-1), NO2-N (mg L-1), NH3-N (mg L-1), chlorophyll and alkalinity (mg L-1) were monitored once in a week. The parameters were found to vary little from pond to pond and most of the parameters were within the suitable range for freshwater aquaculture in Bangladesh. The highest survival rate of fish was 95.36 ± 0.15 % in treatment T1 and the lowest was 90.39 ± 0.10 % in treatment T2. The survival rates of fish were not significantly different among the treatments (P > 0.05). The production of fish in T1 and T2 treatment was 25.36 and 20.43 kg dec-1, respectively. Daily growth of shing in two treatments were 1.95 ± 0.01 and 1.88 ± 0.01 % respectively. The study revealed that integrated shing-rabbit would be highly profitable using improve extensive culture system in the rural household ponds through effectively reducing the use of pond fertilizer and fish feeding cost.
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Loboiko, Yu V., Ye O. Barylo, Yu R. Vachko, B. S. Barylo i I. R. Rachkivska. "Technologies of carp growing and their features". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 23, nr 95 (11.12.2021): 54–59. http://dx.doi.org/10.32718/nvlvet-a9507.
Pełny tekst źródłaStreszczenie:
Carp is one of the few fish farms for which a wide range of technologies has been developed: from extensive, with minimal human intervention in the formation of fish productivity of the reservoir, to intensive, with the most controlled production conditions. Carp has many biological features, enhanced by centuries of breeding work, making this fish extremely “technological”, able to more or less fully realize the genetically determined bioproductive properties of different breeding technologies. Technologies for growing commercial carp according to the level of intensification of the production process can be divided into extensive (grazing), semi-intensive, intensive, and continuous, as a distinct type of intensive technology for growing carp in ponds and pools. Extensive technology assumes that the fish will feed exclusively on natural food, zooplankton, and bottom fauna. In this case, the cost of growing carp will be the lowest; the fish will be called “ecological”, but the growth of individuals will be insignificant. Semi-intensive technology assumes that carp feed on natural feeds, and their energy needs are met by providing carbohydrate additives to feed. Intensive technology believes that carp feeding with compound feeds with high protein content is used, which allows achieving productivity of 3–20 tons/ha. This system requires the highest costs, although it gives the highest performance. The pond must provide additional aeration and water flow to prevent contamination of the reservoir and the development of fish diseases. The main disadvantage of popular carp growing technologies is their staging. All operations are carried out strictly one after another in specialized ponds. Moreover, each stage ends with the descent of the tanks, and the fish are transplanted several times from one to another (from spawning to juvenile, from them to nursery). During this, the carp is injured, which negatively affects its productivity and inevitably leads to waste. To remedy this, fish farming is now using continuous rearing technology. The choice of technology for growing carp is a responsible task on which the profitability of fisheries depends.
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SHISHANOVA, Elena Ivanovna, Aleksandr Sergeevich BAGDASARIAN, Anna Eduardovna SEMAK, Alexander Lvovich FROLOV i Pavel Nikolaevich SHARONIN. "Integrated Use of Multitrophic Aquaculture Resources in the Recreational Business". Journal of Environmental Management and Tourism 11, nr 3 (16.06.2020): 714. http://dx.doi.org/10.14505//jemt.v11.3(43).25.
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The article deals with the development of approaches to the integrated use of multitrophic aquaculture resources in the recreational business. It is revealed that multitrophic aquaculture allows successfully combining several areas in nature management. This includes obtaining high-quality food products (both of animal and plant origin), protecting and growing valuable medicinal plants, expanding the area of melliferous plants, and cultivating various industrial crops. It is proved that fish farming, often being extensive, can be considered as a kind of organic farming in the framework of recreational projects using multipurpose reservoirs. It is revealed that reservoirs used in recreational business, as well as the territories directly adjacent to them, are often characterized by an increased level of biodiversity that allows considering such territorial complexes as important stabilizing ecological zones.
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El-S. Easa, M., M. M. Shereif, A. I. Shaaban i K. H. Mancy. "Public health implications of waste water reuse for fish production". Water Science and Technology 32, nr 11 (1.12.1995): 145–52. http://dx.doi.org/10.2166/wst.1995.0425.
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Public health and safety concerns have traditionally been the main reasons for resisting waste water reuse for fish farming. Potential adverse health effects in such applications could be avoided if the waste is sufficiently treated before reuse. In a full scale demonstration study in Suez, Egypt, about 400 m3/d of raw sewage were treated using a multi-compartment stabilization pond system, for a total residence time from 21-26 days. The treated effluent conformed to WHO guidelines and was used for rearing two types of local fish (tilapia and gray mullet). The produced fish were subjected to an extensive monitoring program. Bacteriological examination revealed that in all samples the fish muscles were free of bacterial contaminants. Nevertheless, low levels of Escherichia coli andAeromonas hydrophila, were isolated from the surface of the fish. Salmonellae, shigellae and staphylococcus aureus were absent from the surface of all the fish sampled. In addition, toxic metals (Pb, Cu, Zn, and Cd) were found to be at much lower levels than the international advisory limits for human consumption. It is concluded that fish reared in the treated effluent at Suez Experimental Station is (a) suitable for marketing for human consumption, and (b) it's quality is equal or better than fresh water fish in Egypt.
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Zhou, Yueming, Junchao Yang, Amr Tolba, Fayez Alqahtani, Xin Qi i Yu Shen. "A Data-Driven Intelligent Management Scheme for Digital Industrial Aquaculture based on Multi-object Deep Neural Network". Mathematical Biosciences and Engineering 20, nr 6 (2023): 10428–43. http://dx.doi.org/10.3934/mbe.2023458.
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<abstract><p>With the development of intelligent aquaculture, the aquaculture industry is gradually switching from traditional crude farming to an intelligent industrial model. Current aquaculture management mainly relies on manual observation, which cannot comprehensively perceive fish living conditions and water quality monitoring. Based on the current situation, this paper proposes a data-driven intelligent management scheme for digital industrial aquaculture based on multi-object deep neural network (Mo-DIA). Mo-IDA mainly includes two aspects of fish state management and environmental state management. In fish state management, the double hidden layer BP neural network is used to build a multi-objective prediction model, which can effectively predict the fish weight, oxygen consumption and feeding amount. In environmental state management, a multi-objective prediction model based on LSTM neural network was constructed using the temporal correlation of water quality data series collection to predict eight water quality attributes. Finally, extensive experiments were conducted on real datasets and the evaluation results well demonstrated the effectiveness and accuracy of the Mo-IDA proposed in this paper.</p></abstract>
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Tajerin, Tajerin. "ANALISIS EFISIENSI TEKNIS USAHA BUDIDAYA PEMBESARAN IKAN KERAPU DALAM KERAMBA JARING APUNG DI TELUK LAMPUNG". Jurnal Perikanan Universitas Gadjah Mada 6, nr 2 (1.08.2004): 45. http://dx.doi.org/10.22146/jfs.9044.
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Level of technical efficiency in fish culture reflecting the fish farmers achievement correlated to their managerial competency to manage the principle factors affecting its productivity. Objectives of this research were to evaluate technical efficiency in grouper growth out as well as its policy implication. This research was conducted in Lampung Province during September to December 2002. The area was selected by purposive sampling in Padang Cermin Sub district, South Lampung, and the respondent of farmers were selected by census method. The results showed that the average of technical efficiency level achieved by grouper farmers in floating net cages should be classified in middle to high categories with relatively homogen distribution. Principle factors affecting the technical efficiency was level of income from farming fish culture. As the technical efficiency level closed to the frontier, policy of culture development should be conducted using area-based extensive culture approach and should applicate imperative and innovative technologies.
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Hancz, Csaba. "The role of edible insects in sustainable and environmentally friendly aquatic animal feeding". Acta Agraria Kaposváriensis 27, nr 1-2 (2023): 29–50. http://dx.doi.org/10.31914/aak.5005.
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To ensure sustainable growth, feed-fed aquaculture needs to reduce its reliance on fishmeal and oil. Introducing of novel aquaculture feeds such as macroalgae, bacteria, yeasts, and insects can greatly reduce the need for fish in aquaculture while maintaining efficiency and omega-3 fatty acid profiles. Insects, particularly, can efficiently convert organic waste into valuable products, thus reducing waste management costs and replacing fish and soybean meal. The flexibility and efficiency of insect metabolism contribute to their potential in mass food and feed production. However, for insect farming to have a global impact, it needs to be economically viable and capable of supplying insect products in industrial quantities. Extensive research has been conducted to explore the potential of insect meal for various physiological effects in important crustacean and fish species in aquaculture. This paper aims to summarize the relevant literature on these topics and highlight the results of experiments conducted with key species.
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Nazir, Sadia, Noor Khan, Mahroze Fatima, Hamda Azmat, Saima Naveed, Malik Muhammad Ramzan, Muhammad Asghar i in. "The influence of dietary protein concentration on digestive enzyme activities, growth, and body composition in juvenile bullseye snakehead (Channa marulius)". PLOS ONE 18, nr 2 (14.02.2023): e0281274. http://dx.doi.org/10.1371/journal.pone.0281274.
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The bullseye snakehead (Channa marulius) is considered as an affordable and robust freshwater fish for farming in Asia. However, there is limited knowledge on the species’ full nutritional requirements to date with extensive gaps in our knowledge and particularly in precision aspects of protein requirements. Therefore, a three-month feeding trial was conducted under semi-intensive farming conditions to determine the protein requirement of bullseye snakehead using test diets containing 40 (P40), 45 (P45), 50 (P50), and 55% (P55) crude protein levels. The growth performance results revealed that the 55% dietary protein group (P55) had the highest final mean weight (14.09 g fish-1), and net weight gain (12.82 g fish-1). When compared to other dietary treatments, the final weight (R2 = 0.921), and weight gain (R2 = 0.913), displayed a linear increasing trend as dietary protein is raised. The lowest FCR was observed in 50% (1.94±0.01) and 55% (1.97±0.01) CP diet groups compared to dietary treatments. Further analysis has shown that the body protein content also significantly increased as dietary protein was raised to 55%. Although, a reverse trend was found in body lipid levels with increasing protein in the diet. The incremental dietary protein also elevated proximal intestinal protease activity but decreased amylase and lipase activity. The overall essential and non-essential amino acids levels of snakehead fillet muscle reflected an increase in dietary protein. Overall, this study has shown that the fish fed a diet with 55% crude protein attained the highest growth performance and nutrient profile of the whole fish when compared to other dietary treatments tested. It would appear we did not obtain the maximum potential for growth under the present experimental conditions due to the upper protein constraint of 55% in the diet. Further quantitative studies are suggested.
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Swasono, M. Aniar Hari, i Wenny Mamilianti. "IbM Mix Farming Dengan “Nutrisi Alami” Solusi Pemenuhan Kebutuhan Pangan yang Sehat dan Segar". JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) 1, nr 2 (14.10.2017): 47. http://dx.doi.org/10.36339/je.v1i2.49.
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The livelihoods the people of Sekarmojo village are mostly farmers and farm laborers. The average level ofeducation is primary school. This becomes an obstacle in technology adoption. The village location is linked to a stonypath and not yet all paved. This condition causes the community of Sekarmojo Village not yet maximally in adoptinginformation especially information technology. Issues that exist within the partner community group, among others : (1)the lack of knowledge and technology in improving local resource-based welfare, (2) extensive yard has not been usedsustainably, (3) livestock and fishery activities have not been managed with sustainable technology, (4) housewife'sactivities yet leads to productive activities, (5) the supply of food (fish, meat and vegetables) that fresh can not be obtainedat any time. The purpose of this activity are: (1) Providing science and technology to the community in managing yardthat produces vegetables, meat and organic fish, (2) realizing sustainable food home area in Sekarmojo PurwosariPasuruan village, (3) increasing of human resource quality in production activity agriculture, (4) creating new businessopportunities within the community, (5) opening and expanding networks of cooperation with private and governmentagencies. The benefits of this activity are (1) the fulfillment of family food needs (2) the community has productiveactivities, (3) the formation of new business. Methods of implementation include community counseling, training, directdemonstration / practice, mentoring and evaluation to see the effectiveness of the program so that the program will besocialized efficiently. The results have been achieved, among others: (1) Partners have been able to create naturalnutrients that are useful for planting vegetables, fish farming and chicken farming. (2) Partners have an understandingand an increasing insight in the management of the yard. (3) Partners have new businesses that can supplementhousehold income, namely vegetable seeding business and organic vegetable sales. (4) Partners have started to make thedesign / business plan of breeding business
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Karpenko, L. Yu, A. A. Bakhta, K. P. Ivanova, P. A. Polistovskaya, D. A. Orlova i T. V. Kalyuzhnaya. "Veterinary and sanitary examination of rainbow trout samples (<I>Onchorinchus mykiss</I>) with the application of the drug "SMARTBIOTIC". Legal regulation in veterinary medicine, nr 4 (8.01.2023): 117–19. http://dx.doi.org/10.52419/issn2782-6252.2022.4.117.
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Veterinary and sanitary examination is an extensive set of measures aimed at assessing the quality and safety of raw materials of various origins. As you know, fish is a perishable product, so it is also subject to a thorough veterinary and sanitary examination. To improve the quality and safety of raw materials, currently, biologically active substances are used in almost all branches of agriculture. Some feed additives, in turn, have a beneficial effect on the immune system. When using the drug "SmartBiotic" in concentrations of 0.15% and 0.25%, the organoleptic parameters were within normal limits, there were no traces of muscle tissue decay, samples for hydrogen sulfide and ammonia were negative. It is shown that the drug "SmartBiotic", developed on the basis of humic acids, has a beneficial effect on the quality and safety of products and can be recommended for use in fish farming.
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Skokov, Roman, Dmitry Randelin, Alexander Soloviev i Tlek Sejdaliev. "Southern reed in feed for pond herbivorous fish: ecological, social, economic effects". Fisheries 2023, nr 5 (2.10.2023): 60–66. http://dx.doi.org/10.37663/0131-6184-2023-5-60-66.
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The article presents the directions of environmentally sound management of the biomass of the southern reed based on its use as the main component of feed for herbivorous fish. The formulation and technology of three types of feed for herbivorous fish grown in ponds based on southern cane has been developed; it is proposed to remove the rapidly renewable biomass of southern cane from water bodies and use it in feed production, rather than dispose of it as Class V waste; the production of feed based on southern cane at a feed mill at a price of 25 rubles/kg has been tested; the effectiveness of feed based on southern cane in feeding herbivorous fish in pond farming conditions has been proven; practical recommendations on feeding for fish farms have been developed and the popularization of an intensive method of growing and culture of feeding herbivorous fish with feed based on southern cane. The involvement of the southern cane in feed production will allow to obtain a comprehensive socio-economic effect, consisting in the formation of a new market of raw materials for the production of feed, cleaning of agricultural lands and reservoirs from uncontrolled thickets, reducing fire danger, increasing the production of marketable fish available to the population due to the transition from extensive to intensive method of cultivation, the development of feed production.
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Benjamin, Emmanuel O., Oreoluwa Ola i Gertrud R. Buchenrieder. "Feasibility Study of a Small-Scale Recirculating Aquaculture System for Sustainable (Peri-)Urban Farming in Sub-Saharan Africa: A Nigerian Perspective". Land 11, nr 11 (17.11.2022): 2063. http://dx.doi.org/10.3390/land11112063.
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The (peri-)urban population in developing countries, especially sub-Saharan Africa, is rapidly increasing. As towns and cities grow, so does the demand for fish protein. While flow-through aquaculture can provide fresh, healthy and nutritious fish protein, it is plagued by extensive land requirements as well as effluent discharge and is thus unsuitable for city regions. Alternatively, small-scale Recirculating Aquaculture Systems (RAS) could improve food and nutritional security and livelihoods as well as reduce environmental degradation in (peri-)urban areas despite land and water constraints. The question, however, remains—what are the key technical, business and managerial issues surrounding small-scale RAS in (peri-)urban farming? To answer this question, first, a systematic literature review on RAS in sub-Saharan Africa is conducted. Second, the RAS prototype of the Sustainable Aquaponics for Nutritional and Food Security in Urban Sub-Saharan Africa (SANFU) II project is assessed. This assessment is based on the mass balance and stock density, relevant for fish survival and/or availability as well as net cash flow analyses. The results suggest that small-scale RAS are technically and financially viable with efficient filtration and family labor having proper aquaculture monitoring and management skills. Furthermore, access to adequate equipment and inputs as well as electricity for the recirculating system are crucial. (Peri-)urban innovation actors will adopt RAS if operations are profitable.
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Aravanis, Theofanis, Ioannis Hatzilygeroudis i Georgios Spiliopoulos. "Ensemble Modelling for Predicting Fish Mortality". Applied Sciences 14, nr 15 (26.07.2024): 6540. http://dx.doi.org/10.3390/app14156540.
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This paper proposes a novel ensemble approach, integrating Artificial Neural Networks (ANNs), Symbolic Regression (SR), and Decision Trees (DTs), to predict fish mortality caused by infectious diseases. The intensifying global burden of fish diseases threatens the sustainability of aquatic ecosystems and the aquaculture industry, necessitating sophisticated modelling strategies for effective disease management and control. The proposed approach capitalizes on the non-linear data modelling strength of ANNs, the explanatory power of SR, and the decision-making efficiency of DTs, offering both predictive accuracy and interpretable insights. The architecture of the proposed ensemble method is developed in two stages. In the intermediate stage, an ANN is employed to learn the complex, non-linear interactions between various biological and environmental factors impacting fish health. Additionally, SR is applied to produce a symbolic equation that effectively maps the input variables to fish mortality rates. In the final stage, a DT model is included to enhance prediction performance by capturing decision rules from the data. This hybrid approach offers superior prediction performance while also revealing meaningful biological/environmental relationships that can guide preventive and reactive interventions in the management of fish health. We evaluate the developed models using extensive real-world datasets acquired from two large Greek fish-farming units, which encompass representative disease types. The results demonstrate that our ensemble approach significantly outperforms traditional standalone models developed in our recent previous work, achieving enhanced predictive accuracy, robustness, and interpretability. Overall, this research has far-reaching implications for improving disease predictions, facilitating optimal decision-making in aquaculture management, and contributing to the sustainability of global fish stocks.
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N. Kimambo, Offoro, Jabulani R. Gumbo, Titus A.M Msagati i Hector Chikoore. "The Unusual Reddish-Bloom Appearance in a Freshwater Fishpond at Kingolwira National Fish Farming Center, Morogoro, Tanzania". International Journal of Environment 9, nr 2 (6.11.2020): 204–16. http://dx.doi.org/10.3126/ije.v9i2.32734.
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The study aimed to examines a case of what constituted the uncommonly reddish-bloom appearance in the fishponds during the dry season (September 2018) at Kingolwira National Fish Farming Center located in Morogoro, Tanzania. The study used a benchtop FlowCAM® to investigate species' morphology. One-time assessment of physico-chemical characteristics during the event was performed from the reddish and non-reddish fishponds. Images were compared with the available literature, but also t-test statistics were performed to examine the difference between the fishponds. The results show that the fishponds were significantly (p<0.05) different from each other in terms of physico-chemical parameters except for water temperatures. Furthermore, Microcystis species dominated the non-reddish fishpond whereas Euglenophytes species were pervasive in the reddish fishpond. The two species have the potential to produce secondary metabolites (toxins) or to produce a hypoxia condition that is harmful to the fishery, aquatic ecology, and human. To confirm toxicity nature and dynamics further, future studies should consider extensive and regular diurnal and long-term monitoring.
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Laffargue, P., M.-L. Bégout i F. Lagardère. "Testing the potential effects of shellfish farming on swimming activity and spatial distribution of sole (Solea solea) in a mesocosm". ICES Journal of Marine Science 63, nr 6 (1.01.2006): 1014–28. http://dx.doi.org/10.1016/j.icesjms.2006.03.018.
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Abstract Restructuring coastal fish nursery habitats by extensive shellfish farming in the French part of the Bay of Biscay could influence fish physiology and behaviour and affect the ecological performance of the species. The influence of oyster-trestle cultivation installations on sole (Solea solea) swimming behaviour was investigated using an experimental pond mesocosm. A pen was constructed with three interconnected zones (two with bags of live oysters or oyster shells on trestles, and one free zone). Water renewal depended on the tide. Environmental variables were recorded continuously (temperature, oxygen, pH, meteorological data), every 3–5 days (salinity, samples taken for water analysis and estimation of sedimentation rate) or intermittently (illumination). Sediment cores were taken in each zone before and after the experiment, for sediment redox and water content, plus an evaluation of potential prey. Fish movements (nine sole collected in the wild and tagged with electronic transmitters) were registered during three fortnight-long sessions in spring 2002. In addition to shading from the oyster trestles, water and sediment properties changed significantly in the live oyster zone. Environmental changes and sole swimming behaviour were linked by direct or indirect effects: swimming activity for eight of nine sole followed a diel cycle, with greater travelling distance by night. All the environmental variables modulated swimming activity, but temperature increase, water renewal, and climatic events were associated with key changes between sessions or individual sole. A multilinear regression analysis suggested strongest links with oxygen, atmospheric pressure, light level, water column height, and pH. All sole moved around the enclosure at night, probably to forage. By day, except during gale-force wind, sole returned to the same resting zones. Under the oyster-rearing structures appeared to be the most attractive resting sites. Sole seemingly can occupy an entire nursery in a shellfish farming basin that has moderate habitat changes.
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Paptsov, Andrei Gennadievich, Nabi Dalgatovich Avarskii, Kirill Viktorovich Kolonchin, Aleksandr Ivanovich Bogachev, Sergey Nikolaevich Seregin i Khatimat Nabievna Gasanova. "Insurance as a Component of The Marketing Mechanism to Develop Aquaculture". Revista Amazonia Investiga 9, nr 26 (21.02.2020): 498–510. http://dx.doi.org/10.34069/ai/2020.26.02.57.
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The study aims at assessing the current aquaculture insurance in the Russian market. Due to this, it is necessary to understand the role of the aquaculture industry in the economy and determine its development in Russia, as well as to assess the modern concepts and processes of the aquaculture insurance. According to the general conclusions of the study, the fish farmers’ need in insurance varies depending on the type and size of aquaculture enterprises, the financial structure of their business, and the types of the grown aquatic organisms. In the study it is indicated that the aqua-insurance has not yet become a marketing instrument to minimize economic risks for most fish farmers. This is mainly due to the fact that the aquaculture industry in Russia is still relatively small, and therefore there is a lack of knowledge and experience in the aquaculture insurance. However, the Russia’s strategic position, an extensive fund of inland waters and marine areas, and a diverse species composition of farmed and cultivated aquatic biological resources make the aquaculture development rather attractive for business development. Thus, in the study it is concluded that in case of the further development of fish farming, the demand for knowledge and experience in the area of aquaculture insurance will increase.
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Bektursunova, Maya Zh, Asan Bekeshovich Ospanov, Valentina Ivanovna Sidorova, Nadezhda Ivanovna Yеnvareva, Saule Zhangirovna Asylbekova i Alyona Aleksandrovna Mukhramova. "Using non-traditional raw materials in production of compound feeds for valuable fish species". Vestnik of Astrakhan State Technical University. Series: Fishing industry 2022, nr 2 (22.06.2022): 34–49. http://dx.doi.org/10.24143/2073-5529-2022-2-34-49.
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With the development of commercial fish farming in Kazakhstan the need for high-quality feed for fish has greatly increased. There has been carried out extensive monitoring of using unconventional raw materials in the production of feed for valuable fish species. Most promising sources of raw materials for valuable fish species are soy, pea isolates and concentrates, wheat and corn gluten, meal and cake (soy, flax, rapeseed). The physicochemical composition and nutritional value of the non-traditional, secondary raw materials and waste of processing industries were defined, the norms of their introduction into feed were determined, the methods of their processing were analyzed, the probiotic preparations used in the feed industry and their effect on the digestibility of nutrients were considered and proposed. Taking into account the physiological needs of fish, the formulations for domestic feeds for valuable fish species were developed using non-traditional raw materials and a probiotic preparation Biocons containing lactic acid bacteria. Experimental starter and production compound feeds for valuable fish species were produced at the plants
of the Republic of Kazakhstan using feed components of domestic production and non-traditional raw materials by extrusion. The probiotic preparation Biocons was added into the ready-made feed by spraying. The developed compound feeds for valuable fish species have passed a production test on the effectiveness of their use by fish in the fish farms of the Republic of Kazakhstan. AllerAgua compound feed was used as a control. The growth rate of larvae was estimated using the method of volumetric counting (weighing control and final samples), and the method of expert errors was used to assess the fish-breeding and biological parameters of fish. The experiments were carried out in duplicate, then all the data were processed according to the statistical processing according to G.F. Lakin. It has been stated that the feeds developed at the enterprises of the Republic of Kazakhstan are not inferior in quality to foreign ones, while their cost is much lower, which makes it possible to recommend them for use in aquaculture enterprises.
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Kumar, Katta Sravan Naga Parimala, i Mohammad Aslam Ansari. "Documenting and Analyzing Targeted Interventions of State Fishery Department of Andhra Pradesh, India". Asian Journal of Agricultural Extension, Economics & Sociology 41, nr 10 (7.10.2023): 666–75. http://dx.doi.org/10.9734/ajaees/2023/v41i102211.
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Aims: Though Andhra Pradesh acts as an aquaculture hub, several targeted interventions were implemented by the State Fishery Department of Andhra Pradesh for the benefit of farmers. But lack of awareness among the fish farmers about these interventions leads to severe economic loss. Hence, this study aims to document and describe the interventions implemented by the Andhra Pradesh Fisheries Department which helps the fish farmers to make well-informed decisions.
Study Design: Descriptive study design was used to describe the purpose of documented interventions
Place and Duration of Study: Interventions provided by State Fishery Department of Andhra Pradesh for fish farmers were documented from Fish Development Officers during March 2023.
Methodology: The study collects data from various sources, including fish development officers, government reports, and other publications to document the interventions provided by Fisheries department of Andhra Pradesh. Focus Group Discussion was conducted with the fish development officers to critically analyze these interventions.
Results: The interventions can be categorized into five broad categories; which were, fisheries inputs, infrastructure, capacity-building programs, financial assistance, and others/ miscellaneous. Under fisheries inputs; fish seed, fish feed and aerators were given. Infrastructural interventions such as feed analysis, water analysis, soil analysis, microbial analysis, PCR, fish hatchery units, fish processing units, mobile aqua labs, fish kiosks, Fish Andhra Fit Andhra, Traditional fish farming implements were provided. Simultaneously, capacity building programmes like training, demonstration, workshops, FFPO, extensive awareness programmes, training for other interns and other professionals were also conducted. Financial assistance was provided through KCC, YSR pension kanuka scheme, Electricity subsidy, Matya Kara Barosa and other facilities like licensing, assistance to new fish farmers were also carried out.
Conclusion: Interventions of State Fisheries department was classified into five categories for better understanding and to make effective use of the interventions by the farmers. Lack of awareness about the interventions lead to severe economic loss among fish farmers. Hence, this study aims to address the information gap and empower the stakeholder through proper documentation of fisheries interventions by State Government which enables the fish farmers to make well-informed decisions.
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Karło, Agata, Aleksandra Ziembińska-Buczyńska, Maciej Pilarczyk i Joanna Surmacz-Górska. "Molecular Monitoring Of Bacterial And Microalgal Biocenoses’ Biodiversity In High Loaded Farming Ponds". Ecological Chemistry and Engineering S 22, nr 3 (1.09.2015): 425–37. http://dx.doi.org/10.1515/eces-2015-0024.
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Abstract Eutrophication process is a serious problem in water ecosystems. There is a great need to study the relation between the physico-chemical condition of water and the influence of these parameters on the diversity of biological life, especially on changes in the structure of microbiocenoses. The most interesting are bacteria and microalgae, due to the important roles they play in maintaining the balance of the aquatic environment. In this study, biodiversity analysis of eukaryotic microalgae and bacteria in two artificial water ecosystems - fish farming ponds - was performed. Aquaculture was based on IMTA technology, in which every part of the trophic chain plays a significant role in maintaining the balance in the ecosystems. Experimental intensive - extensive systems differed in terms of nutrient loads, ponds were characterized by high loads of organic and inorganic nitrogen and phosphorus. During the experimental period, the physicochemical conditions, quantitative genotypic structure of the two biocenoses being studied and the relation between these factors were monitored and investigated. For the biodiversity analysis, the PCR - DGGE technique was used. The results of preliminary research showed that there is a correlation between nutrient loads, diversity expressed in the Shannon-Wiener Index and the overall condition of experimental systems. Higher loadings of nutrient promote the development of bacteria and microalgae without any influence on the balance in the artificial ecosystem being tested.