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Soetrisno, Coco Kokarkin. "NON-CLOTTING HAEMOLYMPH OF WSSV-INFECTED SHRIMP: IS IT A FACTOR IN INFECTION PROCESSES?" Indonesian Aquaculture Journal 4, n. 2 (31 dicembre 2009): 109. http://dx.doi.org/10.15578/iaj.4.2.2009.109-119.
Testo completoAbstract (sommario):
White spot syndrome virus is recognized as the most prominent pathogen of penaeid shrimp and has been affecting this shrimp farming industry around the world. The virus may reduce the shrimp’s immune response and alter enzymatic and biochemical composition of tissues. Similar to other environmental stressed or other pathogeninfected shrimp, in late stages of WSSV infection, shrimp will fail to clot the haemolymph, so any minor injury will lead to increased haemolyph loss. A series of experiments to determine the effect of non-clotting haemolymph on WSSV infection were carried out in controlled facilities in Indonesia. The preliminary test showed that normal clotting time was 13.3 seconds while WSSV-injected shrimp mostly failed to clot their haemolymph 16 hours post infection (hpi). Some other clinical signs such as abnormal swimming, red discoloration, white spots and mortality were consistent with those observed by previous studies. Three shrimp species: banana shrimp (P. merguiensis) 9 g , white leg shrimp (P. vannamei) 7 g and the tiger shrimp (P. monodon) 16.5 g were water-borne-challenged with non-clotting, WSSV-infected haemolymph (NCH) from tiger shrimp donor in duplicate tanks each with 12 shrimp. The control were tiger shrimps fed with WSSV-infected tissue at the rate of 40% of bodyweight (BW) and other tiger shrimps were used as negative controls fed with commercial feed only.The study revealed that NCH dosages of 1.46%; 2.03%; and 2.06% (v/v) for eachspecies were sufficient to infect and kill all shrimps in less than two days comparedto eight days for the shrimps fed on infected tissue. The WSSV in non-clottedhaemolymph eventuallyattaches into the living tissues of healthy shrimp. This modeof infection is likely more difficult to control by the ordinary fine mesh screeningmethod.
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Rusadi, Dian, Wardiyanto Wardiyanto e Rara Diantari. "TREATMENT OF VIBRIOSIS DISEASE (Vibrio harveyi) IN VANAME SHRIMP (Litopenaeus vannamei, Boone 1931) USING Avicennia alba LEAVES EXTRACT". e-Jurnal Rekayasa dan Teknologi Budidaya Perairan 7, n. 2 (23 ottobre 2019): 909. http://dx.doi.org/10.23960/jrtbp.v8i1.p909-916.
Testo completoAbstract (sommario):
Avicennia alba is a mangrove plant that often ued by coastal society as a traditional medecine, it is potential to be dveloped as the sources of pharmaceutical. The aim of the research is to examine the effect of Avicennia alba leaves extract various concentrations to Vibrio harveyi infection on vaname shrimp. The addition of the extract is thought to be used as an antibacterial so that it can give effect to the attack of V. harveyi in vaname shrimp. Vaname shrimps (total of 120 shrimps) with a weight of 10±2g/ind were injected intramuscularly with V. harveyi bacteria in 107 CFU/ml density. After the occurrences of clinical symptoms, the shrimps were immersed into A. alba leaves extract with concentration 0 ppm, 150 ppm, 250 ppm, and 350 ppm for 21 days. The results showed that the addition leaves extract can increase shrimp’s survival rate as much as 46.67% and increase the shrimp’s ability to prevent (RPS) V. harveyi infection untill of 70±15%. The mean time of death (MTD) was 106±18.33 hours, it caused there ar active compounds contained such as saponin, tannin, and steroid be suspected antibacterial so that they can protect shrimp from the effect of Vibrio infection damage. Giving a concentration of 250 ppm Avicennia alba leaves extract can treat vaname shrimp which was attacked by V. harveyi better than other treatments.
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Widanarni, Puguh Widagdo e Dinamella Wahjuningrum. "Oral application of probiotic, prebiotic, and synbiotic in Pacific white shrimp(Litopenaeus vannamei)challenged with Vibrio harveyi". Jurnal Akuakultur Indonesia 11, n. 1 (14 novembre 2013): 54. http://dx.doi.org/10.19027/jai.11.54-63.
Testo completoAbstract (sommario):
<p>The use of antibiotics for controlling of luminous vibriosis caused by <em>Vibrio harveyi</em> is restricted now, because it induces antibiotic-resistant bacteria and leave residue in shrimp’s body. An alternative solution that can be done to treat the disease is by using applications of probiotic, prebiotic, and synbiotic. The aim of this research was to examine the effect of probiotic, prebiotic, and synbiotic on the survival rate and growth of Pacific white shrimp against <em>V. harveyi</em> infection. Feed as a treatment was supplemented with probiotic 1%, prebiotic 2%, and probiotic 1%+prebiotic 2% (synbiotic). Shrimps feed without supplementation of probiotic and prebiotic was used as a control treatment. The shrimps were maintainedin the aquarium (60×30×35 cm<sup>3</sup>) with a density of 40 shrimps/40 L and an average weight of 0.4±0.1 g. After 30 days of feeding treatment, the shrimp was challenged by immersion method with <em>V. harveyi</em> solution containing 10<sup>6</sup> CFU/mL. The results showed that before challenge, synbiotic feed treated shrimp has a growth rate (5.89%), feed conversionrate (1.21), and a high survival rate (80%). After challenge, survival rate (83.33%) of shrimp fed diet supplemented with synbiotic was higher than prebiotic (51.67%) and positive control (31.67%).</p> <p>Keywords: probiotic, prebiotic, synbiotic, <em>Vibrio harveyi</em>,Pacific white shrimp</p>
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My, Tran Thi Ai, Nguyen Duy Dat e Nguyen Quoc Hung. "Occurrence and Characteristics of Microplastics in Wild and Farmed Shrimps Collected from Cau Hai Lagoon, Central Vietnam". Molecules 28, n. 12 (8 giugno 2023): 4634. http://dx.doi.org/10.3390/molecules28124634.
Testo completoAbstract (sommario):
This study investigated the occurrence of microplastics (MPs) in the gastrointestinal tracts (GT) and tissues of four common shrimps (including two wild-caught shrimps and two farmed shrimps) collected from a high-diversity lagoon in central Vietnam. The numbers of MP items in greasy-back shrimp (Metapenaeus ensis), green tiger shrimp (Penaeus semisulcatus), white-leg shrimp (Litopenaeus vannamei), and giant tiger shrimp (Penaeus monodon), determined per weight and individual, were 0.7 ± 0.3, 0.6 ± 0.2, 1.1 ± 0.4, and 0.5 ± 0.3 (items/g-ww), and 2.5 ± 0.5, 2.3 ± 0.7, 8.6 ± 3.5, 7.7 ± 3.5 (items/individual), respectively. The concentration of microplastics in the GT samples was significantly higher than that in the tissue samples (p < 0.05). The number of microplastics in the farmed shrimp (white-leg shrimp and black tiger shrimp) was statistically significantly higher than the number of microplastics in the wild-caught shrimp (greasy-back and green tiger shrimps) (p <0.05). Fibers and fragments were the dominant shapes of the MPs, followed by pellets, and these accounted for 42–69%, 22–57%, and 0–27% of the total microplastics, respectively. The chemical compositions determined using FTIR confirmed six polymers, in which rayon was the most abundant polymer, accounting for 61.9% of the MPs found, followed by polyamide (10.5%), PET (6.7%), polyethylene (5.7%), polyacrylic (5.8%), and polystyrene (3.8%). As the first investigation on the MPs in shrimps from Cau Hai Lagoon, central Vietnam, this study provides useful information on the occurrences and characteristics of the microplastics in the gastrointestinal tracts and tissues of four shrimp species that live in different living conditions.
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DABADE, D. SYLVAIN, HEIDY M. W. den BESTEN, PAULIN AZOKPOTA, M. J. ROB NOUT, D. JOSEPH HOUNHOUIGAN e MARCEL H. ZWIETERING. "Quality Perceptions of Stakeholders in Beninese Export-Oriented Shrimp Chain". Journal of Food Protection 77, n. 9 (1 settembre 2014): 1642–48. http://dx.doi.org/10.4315/0362-028x.jfp-13-525.
Testo completoAbstract (sommario):
In recent years, the Beninese shrimp sector has faced a ban on export to the European Union due to lack of compliance with food safety standards. The present study aimed at obtaining insight into the factors that determine shrimp quality and safety in Benin. A survey was conducted to investigate the relationships between stakeholders, the conditions under which shrimps are handled at fishing areas and processed at shrimp plants, and the stakeholders' perceptions of quality. A total of 325 fishermen, 128 intermediate traders, 12 collectors, and 3 shrimp processing plant managers were interviewed face to face. The results showed that various specific relations existed between the stakeholders. For example, loyalty was ensured by family relationships, or incentives were provided to ensure a supply of shrimps between stakeholders. Shrimp handling practices during the steps prior to shrimp processing at the plants were not in agreement with the requirements of the European regulations. For example, shrimps were kept at ambient temperature (28 ± 1°C) by 94.1% of fishermen and 60.9% of intermediate traders. Shrimps were also stored in inappropriate holding containers and washed with nonpotable water. Fishermen, intermediate traders, and collectors considered shrimp size and texture their priority quality attributes, whereas plant managers considered shrimp appearance (freshness) and texture their priority quality attributes. This survey demonstrated that the steps prior to shrimp processing at the plants are the critical steps for shrimp quality and safety because of temperature abuse and inappropriate hygienic conditions. There is a need to communicate and provide incentives for the stakeholders in the first part of the chain to give priority to shrimp freshness. Moreover, training in Good Fishing Practices and safe food handling practices and evaluation of compliance with the practices through monitoring will contribute to better shrimp quality and safety management.
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Taslihan, A., R. Handayani, Suryati Suryati e N. Fahris. "SENSITIFITAS UDANG Litopenaeus stylirostris DAN Penaeus monodon TERHADAP INFEKSI SEMBV (SYSTEMIC ECTODERMAL AND MESODERMAL BACULOVIRUS)". Jurnal Perikanan Universitas Gadjah Mada 4, n. 1 (26 gennaio 2002): 1. http://dx.doi.org/10.22146/jfs.8868.
Testo completoAbstract (sommario):
Study on sensitifity of two shrimps species, there were blue shrimp (Litopenaeus stylirostris) and giant tiger shrimp (Penaeus monodon) against local isolat of SEMBV (systemic ectodermal and mesodermal baculovirus) has been undertaken. The objective of the study were to know sensitivity level of the two shrimp species to virus that cause serious disease namely WSDV (white spots disease virus). Result from the study showed that both shrimps are sensitive to the virus. Inoculating virus through injection caused transmission faster than that by feeding shrimp with infected carcass. Blue shrimp also showed relatively sensitive to SEMBV then that of giant tiger prawn.
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Kemal, Rafi, Ichsan Achmad Fauzi, Sri Nuryati, Wira Wisnu Wardani e Muhammad Agus Suprayudi. "Evaluation of Selenoprotein Supplementation on Digestibility, Growth, and Health Performance of Pacific White Shrimp Litopenaeus vannamei". Aquaculture Nutrition 2023 (5 gennaio 2023): 1–12. http://dx.doi.org/10.1155/2023/2008517.
Testo completoAbstract (sommario):
Selenoprotein is a feed additive that can overcome oxidative stress in intensive Pacific white shrimp (Litopenaeus vannamei) culture. This study evaluated the effects of selenoprotein supplementation at various doses on Pacific white shrimp’s digestibility, growth, and health performance. The experimental design used was a completely randomized design consisting of four feed treatments, namely, control and treatments with selenoprotein supplementation of 2.5, 5, and 7.5 g kg feed-1 with four replications. Shrimps (1.5 g) were reared for 70 days and challenged for 14 days by the bacteria Vibrio parahaemolyticus (107 CFU mL-1). Shrimps used in the digestibility performance evaluation (6.1 g) were reared until sufficient quantities of feces were collected for analysis. Shrimp supplemented with selenoprotein exhibited superior digestibility, growth, and health performance compared to the control ( P < 0.05 ). The use of selenoprotein at a dose of 7.5 g kg of feed-1 (2.72 mg Se kg of feed-1) was considered the most effective for increasing productivity and preventing disease attacks in intensive shrimp culture.
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Herliany, Nurlaila Ervina, Joko Santoso e Ella Salamah. "EFFECTS OF CARRAGEENAN COATING ON ORGANOLEPTIC QUALITY OF BOILED SHRIMP DURING REFRIGERATION STORAGE". Jurnal Agroindustri 3, n. 2 (18 novembre 2013): 61–70. http://dx.doi.org/10.31186/j.agroind.3.2.61-70.
Testo completoAbstract (sommario):
One of the most popular seafood in the world is shrimp, including cooked shrimp. Boiled shrimp is a value added product with high protein content, specific taste, ready to eat, and have an interested colour for consumers. Boiled shrimp must be protected from quality deterioration during storage. The research was carried out to study the effect of carrageenan coating to inhibit the quality deterioration of boiled shrimp based on organoleptic evaluation during refrigeration storage (4-6oC). Peeled undevined (PUD) vannamei (Litopenaeus vannamei) with size 60-70 was used as object. The boiled shrimps treated with two treatmens, which were coated and uncoated boiled shrimps. Application of coating carrageenan on boiled shrimp indicate that coating application could extend its shelf life, proved by higher organoeptic value than uncoated product, based on organoleptic evaluation for frozen boiling shrimp (SNI 01-2346-2006).
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Afrinanda, Lisa, e Ilyas Ilyas. "PERANCANGAN SISTEM KLASIFIKASI UDANG BERACUN PADA JENIS UDANG TENGGEK MENGGUNAKAN METODE K-NEAREST NEIGHBOR (K-NN)." Selodang Mayang: Jurnal Ilmiah Badan Perencanaan Pembangunan Daerah Kabupaten Indragiri Hilir 6, n. 1 (2 maggio 2020): 1–7. http://dx.doi.org/10.47521/selodangmayang.v6i1.140.
Testo completoAbstract (sommario):
Shrimp is one of the seafood which is nutrient-rich needed by the body. However, due to the frequent case of the infected Tenggek-shrimp appeared, it makes people beware to consume it. The classification of Tenggek-shrimp by using image processing of the computer be able to classify the types of shrimp whether poisonous or not. The data mining techniques can be used to classify shrimp based on RGB colors (red, green, blue) and texture (energy, contrast, correlation, homogeneity). The class of Tenggek-shrimp is divided into two, The fresh Tenggek-shrimps that are caught naturally (Class A) and the poisoned Tenggek-shrimps that are caught by using the poison (Class B). The method used in this study is K-Nearest Neighbor (K-NN). This classification system is expected to help the people in selecting good and safe Tenggek-shrimp for consumption. Based on the evaluation results using the holdout method, obtained an average accuracy of 63% with an accuracy of identification of toxic tenggek shrimp of 71.66%, and the accuracy of identification of natural fresh shrimp is about 60%.
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Manoppo, Henky, Sukenda Sukenda, Daniel Djokosetiyanto, Mochamad Fatuchri Sukadi e Enang Harris. "NONSPECIFIC IMMUNE RESPONSE AND RESISTANCE OF Litopenaeus vannamei FED WITH NUCLEOTIDE, β-GLUCAN, AND PROTAGEN DIETS". Indonesian Aquaculture Journal 5, n. 1 (30 giugno 2010): 37. http://dx.doi.org/10.15578/iaj.5.1.2010.37-44.
Testo completoAbstract (sommario):
The objective of this research was to evaluate the nonspecific immune response and resistance of Litopenaeus vannamei fed with nucleotide, β–glucan, and protagen diets. Shrimp juveniles with an average weight of 5.39±0.56 g were reared in glass aquaria at a density of 15 shrimps/aquarium. Shrimps were fed three times a day for four weeks at a feeding rate of 3%/bw/day. Treatment diets consisted of A: basal diet (without immunostimulant), B: β–glucan, C: protagen, and D: nucleotide, each with three replicates. At the end of feeding period, the shrimps were intramuscularly injected with Vibrio harveyi 0.1 x 106 cfu.shrimp-1. Total haemocyte count (THC) of shrimp fed with nucleotide-diet was significantly different compared to that of control shrimp (p=0.01), but not different compared to shrimp fed with protagen-diet. PO activity also increased significantly in shrimp fed with nucleotide-diet (p=0.02). β–glucan diet could also increase THC and PO activity, but compared to the control, the increase was not significantly different. Overall, PO activity of shrimp fed with nucleotide, β–glucan, and protagen diets was high (>0.35). Oral administration of nucleotide, β–glucan, and protagen for four consecutive weeks significantly increased resistance of shrimp to disease (<0.01) where the highest resistance rate was observed on shrimp fed with nucleotide-diet. Growth of shrimp fed with nucleotide-diet was significantly different compared to that of control shrimp (p<0.01), as well as to β–glucan, and protagen-treated shrimp. As a conclusion, supplementation of nucleotide into shrimp pellet enhanced nonspecific immune response and growth performance better than β-glucan, and protagen.
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Matos, Wladiana O., Francisco L. F. da Silva, Savarin Sinaviwat, Andrea Raab, Eva M. Krupp, Gisele S. Lopes, Ana R. A. Nogueira e Joerg Feldmann. "Assessment of trace element content throughout the white shrimp (Litopenaeus vannamei) farming cycle". Environmental Chemistry 20, n. 2 (4 maggio 2023): 44–54. http://dx.doi.org/10.1071/en22098.
Testo completoAbstract (sommario):
Environmental context Intensive aquaculture is the main source of fisheries products. Thus, investigating the food safety of these products and the environmental impacts of the farms on mangroves is necessary. A shrimp productive cycle was evaluated with a focus on trace element accumulation in shrimps and effluent. The results revealed secure levels of elements in the final product; however, the effluent produced in farms is an important source of contamination to mangrove environment. Rationale Aquaculture systems have increased in the last years due to the high demand for seafood consumption, this could impact the environment and subject fisheries to accumulation of toxic elements. To understand some parameters of food safety and environmental impact, the present study evaluated the concentration of trace elements (Al, As, Cd, Co, Cr, Cu, Mn, Mo, Pb, Se, V and Zn) throughout the production cycle of shrimp. Methodology About 50 shrimps per cycle were collected in a shrimp farm in Brazil and their trace element contents were determined by inductively coupled plasma–tandem mass spectrometry (ICP-MS/MS) and microwave-induced plasma–optical emission spectroscopy (MIP-OES). Results At their final lifecycle stage, shrimp samples present a content (mg g−1) of elements following the trend: Cu (102 ± 12) > Al (20.06 ± 4.24) > Zn (14.82 ± 2.46) > Mn (6.24 ± 0.94) > As (2.65 ± 0.42) > Se (0.932 ± 0.140) > Co (0.380 ± 0.05) > Mo (0.254 ± 0.03) > V (0.204 ± 0.02). Discussion The content of Cd and Pb are in allowance with Brazil and USA legislation for crustaceans, however, the content of As is 3–4-fold higher than that allowed by guidelines in all stages of the growth of the shrimp. The final effluent of the shrimp’s pond into the mangroves shows a high mass fraction of Zn and Mn that could be a source of contamination. Some correlations between some elements in the shrimp samples were found, such as As–Se, Se–Co and Se–V. This study was a scoping experiment to study the content of trace elements throughout the farming cycle of shrimps, encouraging the researcher to undergo a wide survey to evaluate the environmental impact of aquaculture shrimp farming.
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Alviani, A. Marsha, Sutrisno e Iskandar Dinata. "THE STUDY OF AUTOFEEDER LAYOUT AND THROWER DISTANCE AT CV PUTRA GUNUNG SARI SEGARA VILLAGE LELATENG KECAMATAN NEGARA KABUPATEN JEMBRANA, BALI PROVINCE". Coastal and Ocean Journal (COJ) 4, n. 2 (30 ottobre 2020): 63–68. http://dx.doi.org/10.29244/coj.4.2.63-68.
Testo completoAbstract (sommario):
Feeding is one of the factors that influence shrimp farming. Feeding should be done regularly. The amount of feed can affect the shrimp's growth. Less amount of feed can hinder the shrimp’s growth and the shrimp become malnourished. On the other hand, the high amount of feed can cause contamination from wasted food scraps. Autofeeder is a technology that can regulate shrimp feeding. Automatic fish feeder is a tool that can automatically spread shrimp feed and adjust the frequency of feeding. Besides, the automatic fish feeder can also reduce the effort and time for farmers to feed fish. The purpose of this research is to learn about the Autofeeders operation, layout, and thrower distance in CV Putra Gunung Sari Segara, Lelateng Village, Kecamatan Negara, Kabupaten Jembrana, Bali Province.
Keywords
Atofeeder, layout, and the thrower distance
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Pham, Thi Thu Hong, Thi Ly Nguyen, Nhut Khanh Chu, Van Chung Cao, Binh Doan, Ngoc Thao Nguyen Nguyen e Tuan Kien Nguyen. "Effects of carrageenan oligosaccharides prepared by electron beam irradiation on frozen shrimps during storage". Nuclear Science and Technology 11, n. 4 (13 gennaio 2023): 51–61. http://dx.doi.org/10.53747/nst.v11i4.331.
Testo completoAbstract (sommario):
1% carrageenan oligosaccharide solutions obtained by electron beam irradiation at the radiation doses of 9 kGy (CO-9) and 30 kGy (CO-30) were applied for shrimps before frozen, and their effects on quality of frozen shrimps were investigated by observing the microstructure of shrimp’s muscle tissue, measuring their weight loss (%), hardness and pH after thawing. Comparison with the shrimps treated by 1% tetrasodium pyrophosphate solution (Na4P2O7, positive control) and distilled water (negative control), the shrimp samples soaked in CO before frozen kept their initial properties, and the shrimps treated by CO-30 solution showed better quality than others after 3 weeks of frozen storage. Specifically, the mean distances of muscle bundles and muscle fibers in the shrimps soaked in CO-30 solution were 23.9 µm and 11.1 µm, respectively, much smaller than 37.9 µm and 14.8 µm in the shrimps treated by Na4P2O7, and 46.7 µm and 19.8 µm in the shrimps soaked in distilled water only. Our results also revealed that the weight loss after thawing and pH of the shrimps soaked in CO-30 solution were 1.55% and 6.40, much lower than that of the positive control sample (2.59% and 6.82) and negative control sample (4.83% and 6.58), respectively. In contrast, the mean of hardness of the sample soaked in CO-30 solution was 20.4, about 20.7 and 36.0% higher than those of positive control (16.9) and negative control (15.0). These results suggested that CO-30 is effective to inhibit the denaturation of shrimp during frozen storage and can be applied to prolong the shelf life and keep the quality of frozen shrimp products.
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Prayitno, Slamet Budi, Bagus Rimbayu Ardie, Romi Novriadi, Vivi Endar Herawati e Seto Windarto. "EFFECT OF BIOACTIVE PROTEIN INGREDIENTS (MOTIVTM) ON TOTAL HEMOCYTE AND SURVIVAL RATE OF VANNAMEI SHRIMP, Litopenaeus vannamei". Indonesian Aquaculture Journal 17, n. 1 (29 giugno 2022): 23. http://dx.doi.org/10.15578/iaj.17.1.2022.23-28.
Testo completoAbstract (sommario):
One of the problematic factors in the cultivation of vannamei shrimp is the outbreak of bacteria and viruses. One way to prevent infection is by strengthening the shrimp’s immune system. MOTIVTM is a fermented corn protein concentrate that has been reported to possess probiotic properties that can positively increase the disease resistance of shrimp. Therefore, this study aimed to determine the effect of bioactive protein (MOTIVTM) on the total hemocyte count and shrimp survival rate. The study used an experimental method with a completely randomized design with five treatments and three replications: A (commercial feed), B (7.5% MOTIV add of 1.5% krill meal instead of 9% fish meal), C (7.5% MOTIVTM add of 1% krill meal to replaces of 2% poultry meal and 6.5% fish meal), D (7.5% MOTIVTM to replaces of 3.5% poultry meal and 4% fish meal), and E (7.5% MOTIVTM to replaces of 7.5% poultry flour). Feeding was done four times/day based on shrimp biomass and weekly feed counts based on daily shrimp survival. The vannamei shrimp used was one gram with a population density of 15 shrimps/aquarium with an aquarium volume of 100 liters.Total shrimp hemocytes, survival, and water quality were all measured. Treatment C had the highest total hemocyte, averaging 4.1 x 107 cells/mL, whereas treatment B had the lowest, averaging 1.4 x 107 cells/mL. During the trial, only treatment C supported 100% survival.
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Ilmiah, Ilmiah, Amrah Husma, Andi Hamdillah e Ma'ruf Ma'ruf. "PEMERIKSAAN PENYAKIT DAN IDENTIFIKASI PARASIT PADA UDANG WINDU (Penaeus monodon) DI TAMBAK TRADISIONAL KABUPATEN PANGKEP". JOURNAL OF INDONESIAN TROPICAL FISHERIES (JOINT-FISH) : Jurnal Akuakultur, Teknologi Dan Manajemen Perikanan Tangkap, Ilmu Kelautan 5, n. 1 (24 giugno 2022): 89–98. http://dx.doi.org/10.33096/joint-fish.v5i1.98.
Testo completoAbstract (sommario):
Shrimp farming in Indonesia was initially dominated by Windu Shrimp, but along with the decline in tiger shrimp production due to disease, one of the things that determines the success of shrimp farming businesses, both traditional and intensive, is pest and disease control. Diseases generally occur due to parasitic infections that cause parts of the shrimp's body to be injured, so that other diseases such as fungi, bacteria, and viruses will be more easily exposed to shrimp that have been infected by parasites. This study aims to examine diseases and identify the types of parasites that are cultivated in traditional ponds in Kabba District, Pangkep Regency. There are 15 shrimps with an average size of 14.7 grr and a length of 21.6 cm. This research was carried out in October 2021 - March 2022, the samples were tested at the Integrated Biological Laboratory of the Faculty of Fisheries and Marine Sciences UMI Makassar, South Sulawesi. Ectoparasite examination is carried out on the walking legs, swimming legs and on the tail. The results of the study found 3 (three) types of parasites that infect tiger shrimp, namely Zoothamnium, Vorticella, and Epistylis, all three of which are included in the Ciliata class The prevalence value of the three types of parasites is 50% with the general category (ordinary infection) and an intensity of 41 ind / tail with a moderate category.
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Boinapally, Kavitha, e Xiuping Jiang. "Comparing antibiotic resistance in commensal and pathogenic bacteria isolated from wild-caught South Carolina shrimps vs. farm-raised imported shrimps". Canadian Journal of Microbiology 53, n. 7 (luglio 2007): 919–24. http://dx.doi.org/10.1139/w07-019.
Testo completoAbstract (sommario):
The objective of this study was to assess and differentiate wild-caught South Carolina (SC) shrimps from imported shrimps on the basis of microbiological analysis. Seven wild-caught SC shrimp and 13 farm-raised imported shrimp samples were analyzed. Total plate counts from wild-caught shrimp samples ranged from 4.3 to 7.0 log10 CFU/g, whereas counts from imported shrimp samples ranged from 3.2 to 5.7 log10 CFU/g. There was no difference (P > 0.05) between total bacterial counts of wild-caught SC shrimp and farm-raised imported shrimp. However, the percentages of bacteria with reduced susceptibility towards ceftriaxone and tetracycline were higher (P < 0.05) for farm-raised shrimp than for wild-caught samples. Salmonella spp. detected only in one farm-raised sample was resistant to ampicillin, ceftriaxone, gentamicin, streptomycin, and trimethoprim. Vibrio vulnificus was detected in both wild-caught and farm-raised shrimp samples; however, only the isolate from farm-raised shrimp was resistant to nalidixic acid and trimethoprim. Escherichia coli detected in one wild-caught sample was resistant to ampicillin. Both Listeria spp. and Salmonella spp. were absent with wild-caught SC samples. Therefore, the presence of more ceftriaxone- and tetracycline-resistant bacteria and the observed antimicrobial resistance phenotypes of isolates from the imported shrimp may reflect the possible use of antibiotics in raising shrimp in those countries.
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Nillian, Elexson, Nur Diyana Zakaria, Dalene Lesen, Nur Hafizah Mohd Yusoff, Nurain Syahirah Binti Ismail, Teng Sing Tung e Lesley Bilung. "Comparison Distribution of Vibrio Species in Stocking to Harvesting Process of Shrimp at Commercialize Shrimp Farm". International Journal of Biology and Biomedical Engineering 16 (21 gennaio 2022): 168–74. http://dx.doi.org/10.46300/91011.2022.16.22.
Testo completoAbstract (sommario):
Vibrio species is one of the pathogenic bacteria infecting shrimps in aquaculture farm has caused severe loss to the aquaculture farm. The aim of this research is to isolate and compare the presence of Vibrio spp. in commercialize shrimp farm during the stocking process and the final harvest phase of shrimp productions. Quantification and isolation were conducted and measured using Log CFU (colony forming units) counts and morphological investigation gram staining and conventional biochemical test identification. A total of sixty-four (n=64) sediment and water samples were collected from the inlet and outlet of the two selected shrimp ponds (Pond A and Pond B) in Kampung Telaga Air, Kuching, Sarawak. As a result, the bacteria count from water samples during stocking period at both shrimps ponnds were 6.6 Log CFU/ml and 5.6 Log CFU/ml while during harvesting period were 5.3 Log CFU/ml and 5.8 Log CFU/ml. Meanwhile, bacteria count sediments samples during stocking period at both shrimp ponds were 5.5 Log CFU/g and 5.7 Log CFU/g whereas harvesting period at showed both shrimps pond were 5.2 Log CFU/g and 4.8 Log CFU/g. The finding showed the Vibrio sp. identified in sediment samples were V. parahemolyticus with 27%, followed by V. alginolyticus (22%), V. cholerae (16%). V. fluvialis (14%) and 7% of V. fulmisi and V. vulnificus and V. mimicus. Meanwhile, the Vibrio sp. identified in water samples were V. fluvialis with 29%, followed by V. alginolyticus (22%), V. parahemolyticus (19%) and 10 % were V. fulmisi , V. mimicus and V. vulnificus. The study has been carried out further by investigated the Antibiotic Susceptibility Test (AST) using erythromycin (15 ug/ml), ampicillin (10 ug/ml), and streptomycin (25 ug/ml). The positive cultures from sediment samples showed Ampicillin resistant profile was > 0.2 MAR index while fifty percent (50%) of the isolates from water samples were resistant to ampicillin. Therefore, this study has profound implications for further monitoring process from the stocking process towards the harvesting process in order to prevent any Vibrio sp. infection which caused shrimp’s disease or food safety issue related to public consumption or of shrimps in future.
18
Zhou, Heng, Sung-Hoon Kim, Sang-Cheol Kim, Cheol-Won Kim e Seung-Won Kang. "Size Estimation for Shrimp Using Deep Learning Method". Korean Institute of Smart Media 12, n. 3 (30 aprile 2023): 112–19. http://dx.doi.org/10.30693/smj.2023.12.3.112.
Testo completoAbstract (sommario):
Shrimp farming has been becoming a new source of income for fishermen in South Korea. It is often necessary for fishers to measure the size of the shrimp for the purpose to understand the growth rate of the shrimp and to determine the amount of food put into the breeding pond. Traditional methods rely on humans, which has huge time and labor costs. This paper proposes a deep learning-based method for calculating the size of shrimps automatically. Firstly, we use fine-tuning techniques to update the Mask RCNN model with our farm data, enabling it to segment shrimps and generate shrimp masks. We then use skeletonizing method and maximum inscribed circle to calculate the length and width of shrimp, respectively. Our method is simple yet effective, and most importantly, it requires a small hardware resource and is easy to deploy to shrimp farms.
19
Hossain, M. S., M. Aktaruzzaman, A. N. M. Fakhruddin, M. J. Uddin, S. H. Rahman, M. A. Z. Chowdhury e M. K. Alam. "Antimicrobial Susceptibility of Vibrio Species Isolated From Brackish Water Shrimp Culture Environment". Journal of Bangladesh Academy of Sciences 36, n. 2 (14 dicembre 2012): 213–20. http://dx.doi.org/10.3329/jbas.v36i2.12964.
Testo completoAbstract (sommario):
A comparative study regarding prevalence and antimicrobial susceptibility of Vibrio species in the black tiger shrimp (Penaeus monodon Fabricius) culture environment as well as market samples were analyzed. Total Vibrio counts were found to range up to 2.5 × 103 cfu/gm and 60 cfu/gm in shrimp and Gher water samples, respectively. Results revealed that the total vibrio count were found to be higher in samples taking from the market shops in Dhaka city than Gher shrimp samples and the live shrimps were not contaminated with Vibrio species but dead shrimps were found contaminated, which were collected from shrimp Gher. In the antimicrobial susceptibility test, highest 28.57% resistance among total Vibrio isolates was observed to penicillin and cephalexin. Among the seven isolates of Vibrio species from Gher water sample one isolate displayed multi-drug resistance (MDR). The main reason of antibiotic resistance could be the indiscriminate application of antibiotics in shrimp farming and release of shrimp pond effluent to estuarine ecosystems or post harvest contamination of shrimps with the antibiotic resistant bacteria through the environment and human handling. DOI: http://dx.doi.org/10.3329/jbas.v36i2.12964 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 2, 213-220, 2012
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Yarochkin, A. P., G. N. Timchishina, V. N. Akulin, A. N. Bashtovoy, S. P. Kasyanov e I. M. Vigovskaya. "Biotechnological processing of small-sized shrimps for using as seafood". Izvestiya TINRO 200, n. 2 (5 luglio 2020): 460–85. http://dx.doi.org/10.26428/1606-9919-2020-200-460-485.
Testo completoAbstract (sommario):
Main technological and chemical characteristics of small-sized shrimps Pandalus borealis, P. goniurus and krill Euphausia superba are presented. The main processes of this kind of shrimp processing are described, with usage of its own complex of proteinases to produce autoproteolysis products. Lysates of these shrimps have high nutritional value comparable with the value of low-fat cottage cheese, though the shrimp lysate protein is a completely animal protein similar to beef one. As a source of low-fat protein, the shrimp lysates belong to the category of specialized and functional food and food ingredients; they also can de considered as the source of omega-3 fatty acids and astaxanthin. Volatile components of the shrimp lysates contain 30 compounds responsible for taste and aroma properties of crabs and shrimps, as thiran, methylthiran, dimethyldisulfide, thioacetic acid, 2-mercaptopropanoic acid, etc. Safety of shrimps and their lysates is provided by low content of organochlorine compounds, radionuclides, toxic elements and low values of microbiological parameters, below of the maximum permissible levels. The shrimp lysates are suitable for using in manufacture of emulsion and pasty products with high commodity properties, classified as gastronomic products with high taste and nutritional value.
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Hasan, MM, MS Islam, MM Islam, A. Khanam e M. Akter. "Threats to aquatic faunal diversity due to shrimp Penaeus monodon post larva collection in Kuakata sea beach of Patuakhali". Bangladesh Journal of Zoology 47, n. 2 (12 dicembre 2019): 273–83. http://dx.doi.org/10.3329/bjz.v47i2.44338.
Testo completoAbstract (sommario):
To assess the abundance of black tiger shrimp (Penaeus monodon) post larvae (PL) and to quantify the damage of different aquatic fauna during collection of shrimp PL. About 37 PL of other shrimps, 11 fin fish larvae and 31 macrozooplankton were wasted during collection of a single shrimp PL. During the survey period, around 1.55 million man days/year were estimated to be involved in shrimp PL collection activities and on average 216 million of shrimp PL were collected annually from the studied area. About 17,064 million of other shrimps, fin fishes and macrozooplankton were destroyed annually by shrimp seed collectors in Kuakata beach. Variation in water surface temperature and pH was not found but salinity and hardness showed great fluctuation during the study period. Water temperature, salinity and pH are significantly (p<0.01) correlated with shrimp PL abundance. Therefore, the results imply that present seed collection practice causes severe damage of other valuable aquatic fauna, which directly affect the faunal diversity, natural productivity and self recruitment pattern of mother stock.
Bangladesh J. Zool. 47(2): 273-283, 2019
22
Kinoshita, Kyoko, Gyo Itani e Takashi Uchino. "Burrow morphology and associated animals of the mud shrimp Upogebia yokoyai (Crustacea: Thalassinidea: Upogebiidae)". Journal of the Marine Biological Association of the United Kingdom 90, n. 5 (2 giugno 2010): 947–52. http://dx.doi.org/10.1017/s0025315410000214.
Testo completoAbstract (sommario):
The burrow morphology of the mud shrimp Upogebia yokoyai was investigated on a tidal flat in the Nanakita River mouth in north-eastern Japan using in situ resin casting. A total of 26 burrow casts were recovered, including those of 16 large shrimps and 10 small shrimps. Burrows of large shrimp were relatively simple and Y-shaped with depth exceeding 1.2 m. Although burrow diameter was related to shrimp size, correlation with other burrow measurements was low. Three large casts were connected to others via a narrow horizontal portion potentially reflecting mating behaviour of the shrimp. Burrows of small shrimp were more complex than those of the other upogebiids and were connected to large burrows. In 6.7% of cases, bopyrid isopods were present in the branchial chamber. Three species of gobies were found in the burrows. These data show that burrows of U. yokoyai serve not only as a recruitment site for conspecific shrimp, but also as habitat for other animals in the tidal flat.
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Rahayu Kusdarwati, Gunanti Mahasri, Sudarno,. "Ibm Bagi Petani Benih Udang Windu Skala Rumah Tangga (Backyard) Di Desa Kalitengah Kecamatan Tanggulangin Sidoarjo Yang Mengalami Gagal Panen Berkepanjangan Karena Serangan Penyakit [Ibm For Seed Shrimp Farmers Family Scale (Backyard) In Kalitengah Village, Tanggulangin District, Sidoarjo Region, That Harvesting Lossed To Long Times That Caused By The Diseases]". Jurnal Ilmiah Perikanan dan Kelautan 6, n. 1 (19 gennaio 2019): 31. http://dx.doi.org/10.20473/jipk.v6i1.11378.
Testo completoAbstract (sommario):
Abstract Demand of seed shrimp, as specially tiger shrimps is still not enough until now, it is only 5060%, more than for 5-10 years end showed decreased point. One of factors that influenced the successfully seeds shrimp hatchery is water quality that as a life media of shrimps. A bisnis about shrimp hatchery is still have a good market, because there are a lot of tiger shrimp pond operational, more than some time demand of the shrimp increase fluctuative on seasonal. The aims of this this societies service activities is applicated a new shrimp hatcher technology by using immunostimulant at Putri Mandiri Group company, it aplicated in family hatcher in Kalitengah village, Tanggulangin District, Region of Sidoarjo. The immunostimulant use to increase the body deffence of the shrimp larve in hatchery to the disease attacked dan invirontment during culture periode, it will be increase the harvesting. The method using in the activity were socialitation/counseling, dempond and guiding to application of the method of shrimp hatcher by using immunostimulant in one periode. Monitoring and evaluation about this result were done in one month after the activity ending. This result showed that aplicated immunostimulant in shrimp family hatcher Backyard) can increased the shrimp seed harvesting of Putri Mandiri Company owner, from 900.000 to 1.600.000 shrimp seeds, it is same as that the profit increased from 8.622.000,- until 15.822.000,- Rupiahs for one periode panen for one container 10 tonage capacity.
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Salim, Gazali, Kun Retno Handayani, Agus Indarjo, Julian Ransangan, Riky Rizky, Lukman Yudho Prakoso e Yen Thi Hong Pham. "Characteristics of Population Growth and Mortality of Windu Shrimp (Penaeus monodon) in the Juata Water of Tarakan City, Indonesia". Jurnal Ilmiah Perikanan dan Kelautan 13, n. 1 (31 marzo 2021): 114. http://dx.doi.org/10.20473/jipk.v13i1.21475.
Testo completoAbstract (sommario):
HighlightThe sex ratio of tiger prawns in the waters of female groceries is 1.08 times higher than that of males.The growth characteristic of male and female tiger prawns is negative allometry, but the male and female body shapes are fat.Fishing mortality, capture mortality, exploitation rate, female tiger prawns are higher than males, but total mortality and natural mortality male tiger prawns are higher than females.The male infinitive growth is longer than the female.AbstractThe windu shrimp (Penaeus monodon) is an economically important fishery species in the waters of Tarakan. The shrimp is highly demanded for frozen seafood industry that makes its market price range attractive from Rp. 50,000 (USD 3.37) to Rp. 70,000 (USD 4.72)/kg. This can cause the species to be potentially exploited. However, due to lack of data, the exploitation status of the windu shrimp is unknown. Hence, the present study was carried out to determine the absolute growth, mortality, and exploitation level of the windu shrimp in Juata waters of Tarakan. Sampling of the shrimp using experimental trawling net was conducted four times between June and August 2020 in the waters of Tarakan. Morphometric data of the windu shrimps including sex, total length, carapace length, and total weight were recorded and analyzed. The results showed that the sex ratio of male and female tiger prawns was 1:1.08. The maximum growth of male and female shrimps was estimated at 26.875 and 21.435 cm respectively. The size of the male shrimps caught during the sampling ranged between 8.7 and 22.5 cm, and was estimated to be at 13 to 67 days old respectively. Maximum growth of male shrimp was estimated at 26.875 cm that could be achieved within 411 days. The size of female shrimp caught during the sampling ranged from 9.8 to 19.3 cm with an estimated age of 21 to 87 days respectively. The maximum growth for female shrimp was estimated at 21.435 cm, and achievable within 377 days. The mortality of male and female shrimps was not significantly different at 110.3% and 110.1% respectively. The fishing mortality for male and female shrimps was recorded at 19% and 22.5% respectively. The level of exploitation of male and female shrimps was slightly different at 17.2% and 20.5%, respectively. Finally, the natural mortality for male and female shrimps was at 91.3% and 87.5%, respectively.
25
Barua, Suman, Qun Liu, Mohammed Shahidul Alam, Petra Schneider, Shoukot Kabir Chowdhury e Mohammad Mojibul Hoque Mozumder. "Assessment of Three Major Shrimp Stocks in Bangladesh Marine Waters Using Both Length-Based and Catch-Based Approaches". Sustainability 15, n. 17 (24 agosto 2023): 12835. http://dx.doi.org/10.3390/su151712835.
Testo completoAbstract (sommario):
Penaeus monodon (tiger shrimp), Metapenaeus monoceros (brown shrimp), and Fenneropenaeus indicus (white shrimp) are the most economically important shrimp species in the waters of the Bay of Bengal, Bangladesh. This is the first analytical study to assess three major shrimp stocks using both length-based and catch-based methods, such as length-based Bayesian biomass estimation (LBB), length-based indicator (LBI), and a catch-based method entitled JABBA (Just Another Bayesian Biomass Assessment), to explore and process the data; estimate the growth parameters, with length at first capture; present relative biomasses; and approximate the reference points. The parameters of the von Bertalanffy Growth Function (VBGF) analysis for the tiger, brown, and white shrimps were L∞ = 113.0 mm, 85.4 mm, and 76.4 mm, respectively, for carapace length. Our results showed that the relative biomass level (B/BMSY) of the tiger shrimp was 0.43, suggesting an overfished status, and brown and white shrimps were 0.84 and 0.96, indicating that they were fully exploited but not overfished. This study, therefore, advised an optimum carapace length limit to catch from 57.0–70.0 mm for tiger shrimp, 44.0–53.0 mm for brown shrimp, and 40.0–48.0 mm for white shrimp. The estimated maximum sustainable yield (MSY) reference points were as follows: optimal biomass BMSY = 3116 mt, 15,885 mt, and 2649 mt for tiger, brown, and white shrimp, respectively, and optimal harvest rate uMSY = 12%, 33%, and 8% for tiger, brown, and white shrimp, respectively. The average annual catch values for the last ten years were 265 mt, 2396 mt, and 115 mt below the estimated MSY values of 389 mt, 4899 mt, and 209 mt for tiger, brown, and white shrimp, respectively. But, brown shrimp had the estimated highest carrying capacity (31,770 mt) and intrinsic growth rate (0.66) than the tiger and white shrimp, which was replicated distinctly in the graphical representation of the Kobe plot and the surplus production plot. Hence, the brown shrimp stock is estimated to be in a better state than the tiger and white shrimp stocks.
26
Nurliana, Nurliana, Fauzia Khairunisa, Baharuddin H. Siregar, Dicky H. M. Harahap, Rumi S. Zamzami, Siti R. Ayuti, Ismail Ismail e Rastina Rastina. "Effect of Yeast and Lactic Acid Bacteria Probiotic on The Growth of Tiger Shrimp (Penaeus monodon), Microbiology and Water Quality". E3S Web of Conferences 151 (2020): 01017. http://dx.doi.org/10.1051/e3sconf/202015101017.
Testo completoAbstract (sommario):
Yeast and lactic acid bacteria are often used as probiotics. This study aimed to determine the effect of giving yeast and LAB probiotic using fruit waste as a microbial medium on the productivity of tiger shrimp postlarvae (Panaeus monodon). As many as 120 tiger shrimp post-larvae were acclimatized for 2 days. The tiger shrimps post-larvae were divided into 4 treatments; a control group tiger shrimp post larvae without given yeast and LAB probiotic (P0); treatment 1 (P1); treatment 2 (P2) and treatment 3 (P3) in sequence shrimp post larvae given 25 ml; 50 ml; and 75 ml yeast and LAB probiotic/15 L of water. Yeast and LAB probiotic was given in shrimps post-larvae live media for 3 weeks(once per week). Data were analyzed using analysis of variance (ANOVA) following the Duncan test. The results of this study showed that yeast and LAB probiotic at a dose 25ml/15 L of water can increase the growth of tiger shrimp post-larvae, reduce the amount of Vibrio sp. and maintain the quality of tiger shrimp post larvae environment.
27
Das, Raju J. "Low-Wage Capitalism, Social Difference, and Nature-Dependent Production". Human Geography 7, n. 1 (marzo 2014): 17–34. http://dx.doi.org/10.1177/194277861400700109.
Testo completoAbstract (sommario):
Internationally, neoliberalism is often associated with the export-oriented production of nontraditional agricultural goods from poorer to richer countries. Shrimp aquaculture is a very important aspect of this process. Economic geographers, sociologists, and others have critically analyzed the problems of shrimp farmers and the adverse environmental effects of shrimp aquaculture. But they have generally neglected a crucial dimension: the conditions under which men, women, and children work for a wage in producing shrimps. The story of shrimp culture has been, more or less, the story of the missing wage laborer. Drawing on in-depth interviews in India, this paper discusses the conditions of laborers in export-oriented shrimp culture. It shows how the export-oriented production of shrimps results in the reproduction of a working class that works for abysmally low wages and under very poor conditions. The exploitation and domination of aqualaborers happens in ways in which capitalist relations are mediated by place-specific relations of difference and the specificities of nature-dependent production.
28
Sun, Weizhen, Hongwu Ji, Di Zhang, Zewei Zhang, Shucheng Liu e Wenkui Song. "Evaluation of Aroma Characteristics of Dried Shrimp (Litopenaeus vannamei) Prepared by Five Different Procedures". Foods 11, n. 21 (6 novembre 2022): 3532. http://dx.doi.org/10.3390/foods11213532.
Testo completoAbstract (sommario):
Litopenaeus vannamei is one of the most popular shrimp species in the world and has been reported in studies on its dryness and flavor. However, the aroma characteristics of shrimps dried with different drying methods are compared in a unified way, and there are few reports on the difference in aroma of different shrimps dried. In order to clarify the difference in aroma characteristics of shrimp dried produced by different drying methods. In this study, blanched shrimp (BS) was used as a control to analyze the aroma characteristics of shrimp dried by five different procedures (SD-BFDP) samples, namely vacuum freeze-dried shrimp (VFDS), vacuum dried-shrimp (VDS), heat pump-dried shrimp (HPDS), hot air dried-shrimp (HADS) and microwave vacuum-dried shrimp (MVDS). An electronic nose (E-nose) was used to obtain the aroma fingerprint of SD-BFDP samples. Headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used for qualitative and quantitative analysis of volatile compounds in SD-BFDP samples. Partial least squares regression (PLSR) was used to analyze potential correlations between sensory attributes and aroma-active compounds (AACs). Partial least squares-discrimination analysis (PLS-DA) was used to screen for signature aroma compounds. The results of the E-nose showed that there were differences in the aroma fingerprints of the SD-BFDP samples, and the E-nose could distinguish the five kinds of SD-BFDP. The qualitative and quantitative results of GC-MS showed that the types and contents of the main volatile components of SD-BFDP samples were different. 15 AACs were screened from SD-BFDP based on odor activity value (OAV). The PLSR results showed good correlations between certain sensory attributes and the majority of AACs. PLS-DA results displayed that aroma attributes of SD-BFDP samples could be distinguished by six signature aroma compounds, including trimethylamine, 2,5-dimethylpyrazine, 2-ethyl-5-methylpyrazine, nonanal, 3-ethyl-2,5-dimethylpyrazine, and octanal. These research results reveal that shrimps dried in different procedures have unique aroma characteristics, which could provide a theoretical basis for the rapid identification of aroma attributes of dried shrimps in the future. From a flavor perspective, MVD is the best drying method.
29
Akonor, P. T., H. Ofori, N. T. Dziedzoave e N. K. Kortei. "Drying Characteristics and Physical and Nutritional Properties of Shrimp Meat as Affected by Different Traditional Drying Techniques". International Journal of Food Science 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/7879097.
Testo completoAbstract (sommario):
The influence of different drying methods on physical and nutritional properties of shrimp meat was investigated in this study. Peeled shrimps were dried separately using an air-oven dryer and a tunnel solar dryer. The drying profile of shrimp meat was determined in the two drying systems by monitoring moisture loss over the drying period. Changes in color, proximate composition, and rehydration capacity were assessed. The rate of moisture removal during solar drying was faster than the air-oven drying. The development of red color during drying was comparable among the two methods, but solar-dried shrimps appeared darker (L⁎=47.4) than the air-oven-dried (L⁎=49.0). Chemical analysis indicated that protein and fat made up nearly 20% and 2% (wb) of the shrimp meat, respectively. Protein and ash content of shrimp meat dried under the two dryer types were comparable but fat was significantly (p<0.05) higher in oven-dried meat (2.1%), compared to solar-dried meat (1.5%). Although rehydration behavior of shrimp from the two drying systems followed a similar pattern, solar-dried shrimp absorbed moisture more rapidly. The results have demonstrated that different approaches to drying may affect the physical and nutritional quality of shrimp meat differently.
30
Rohmin, M. Ferri Tahta. "Response Analysis Of Urban Vaname (Litopenaeus Vannamei) Which Is Exposed to Crude Protein Zoothamniumpenaei Oral and Maintained In Ponds". Jurnal Biosains Pascasarjana 19, n. 2 (28 agosto 2017): 143. http://dx.doi.org/10.20473/jbp.v19i2.2017.143-157.
Testo completoAbstract (sommario):
ABSTRACTThe objectives of this study were immune response, specific growth rate and survival rate of shrimp vaname (Litopenaeus vannamei) in ponds. The research method used was experimental to know the effect of feed use and added crude protein Zoothamnium penaei on vaname shrimp (Lithopenaeus vannamei) in pond. The sample used is shrimp vaname (Lithopenaeus vannamei) as much as 10,000 heads of juvenile stadia. The food used is commercial feed added crude protein Zoothamnium penaei with a dose of 150 μl / head, which is given 7 times every 7 days interval from the age of 1 day up to Shrimp aged 56 days in ponds. The results showed that there was an increase of immune response (increase of THC and DHC) due to feeding added by Zoothamnium penaei crude. The highest total of Haemocytes (THC) occurred in commercial-fed shrimp and added crude protein ie 56,58 x 106 cell / ml, And the lowest in shrimp shrimp that is not given its crude protein 23.57 x 106 cells / ml. Similarly, the highest Differential Haemosite Count (DHC) also occurred in shrimps fed commercial and added crude protein, 26.57% aged 60 days in ponds and 14.99% low on shrimp not given 90 day crude protein in ponds . Results of parasite shrimp infestation examination exposed with crude protein showed that the highest Zoothamnium penaei infestation was obtained in shrimp fed with artificial feed and not added crude protein Zoothamnium penaei that is 63,35% in shrimp age 90 days. While the shrimp were given artificial feed and added crude protein Zoothamnium penaei infestation Zoothamnium penaei highest of 14.27% in 90 days old shrimp.The highest specific rate of vaname shrimp growth also occurred in shrimp fed commercial and added crude protein Zoothamnium penaei highest of 53.46% and the lowest 16.15% in shrimps aged 90 days in ponds. The highest shrimp life occurrence occurred in commercial vaname shrimp and added crude protein Zoothamnium penaei age of 90 days which has a higher tendency than shrimp that is not given crude protein that is 72% and 21%. The addition of Zoothamnium crude protein to commercial feed as immunostimulant material may enhance immune response, specific growth and shelf life of 30, 60 and 90 days old shrimp in ponds, so that it can be developed as an immunostimulant material.Keyword: Litopenaeus Vannamei, Zoothamnium penaei, udang vanamei
31
March, James G., Jonathan P. Benstead, Catherine M. Pringle e Mark W. Ruebel. "Linking shrimp assemblages with rates of detrital processing along an elevational gradient in a tropical stream". Canadian Journal of Fisheries and Aquatic Sciences 58, n. 3 (1 marzo 2001): 470–78. http://dx.doi.org/10.1139/f00-263.
Testo completoAbstract (sommario):
We experimentally excluded freshwater shrimp assemblages (Atyidae, Xiphocarididae, and Palaemonidae) to examine their effects on detrital processing and benthic insect biomass at three sites along an elevational gradient in a tropical stream in Puerto Rico. We also determined which shrimp taxon was responsible for leaf decay in a subsequent laboratory experiment. At the high-elevation site, the shrimp assemblage was dominated by Atya spp. and Xiphocaris elongata, and leaf decay rates were significantly faster in the presence of shrimps than in their absence. Laboratory experiments showed that this was primarily due to direct consumption of leaves by Xiphocaris. Shrimps had no effect on leaf decay rates at mid- and low-elevation sites where there were higher proportions of Macrobrachium spp. shrimps (which prey on Xiphocaris). Laboratory experiments showed that Xiphocaris consumed significantly less leaf material and experienced significantly higher mortality in the presence of Macrobrachium. Shrimp exclusion resulted in significantly less and significantly more insect biomass at the high- and low-elevation sites, respectively; no difference was found at the mid-elevation site. Insects played a minor role in leaf decay. Results show a strong linkage between shrimp assemblages and rates of detrital decay and illustrate the importance of conducting experiments at multiple sites.
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SPERLING, L., T. ALTER e S. HUEHN. "Prevalence and Antimicrobial Resistance of Vibrio spp. in Retail and Farm Shrimps in Ecuador". Journal of Food Protection 78, n. 11 (1 novembre 2015): 2089–92. http://dx.doi.org/10.4315/0362-028x.jfp-15-160.
Testo completoAbstract (sommario):
The aim of this study was to investigate the prevalence of Vibrio spp. in shrimp at retail and in shrimp farms in Ecuador and to determine the antimicrobial agent resistance patterns of farm isolates. The presence of genes linked to early mortality syndrome (EMS) or acute hepatopancreatic necrosis disease (AHPND) also was evaluated. Vibrio spp. were isolated from retail shrimps in Cuenca, Ecuador, and farm shrimps originating from provinces El Oro and Guayas, Ecuador. A total of 229 shrimp samples were collected, of which 71 originated from retail markets in Cuenca and 158 came from shrimp farms. Overall, 219 (95.6%) samples tested positive for Vibrio spp. Vibrio parahaemolyticus (80.8%) was the most common species detected, followed by Vibrio alginolyticus (50.2%), Vibrio cholerae (11.3%), and Vibrio vulnificus (3.5%). None of the V. parahaemolyticus isolates carried the virulence-associated tdh and trh genes. In V. parahaemolyticus shrimp farm isolates, high resistance was found to ampicillin (92.2%), and intermediate resistance was found to tetracycline (51.3%) and amikacin (22.1%). Of the V. parahaemolyticus strains, 68 were resistant to at least three antimicrobial agents, and 2 were resistant to seven antimicrobial agents simultaneously. Up to 18 resistant isolates were found for V. alginolyticus, whereas V. vulnificus and V. cholerae isolates were more susceptible. None of the V. parahaemolyticus isolates carried the EMS-AHPND plasmid. The results of this study revealed the ubiquitous occurrence of Vibrio spp. in shrimps at retail and on shrimp farms in Ecuador.
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Eshik, Md Mostavi Enan, Md Minhazul Abedin, Nusrat Jahan Punom, Mst Khadiza Begum e Mohammad Shamsur Rahman. "Molecular Identification of AHPND Positive Vibrio Parahaemolyticus causing an outbreak in South-West Shrimp Farming Regions of Bangladesh". Journal of Bangladesh Academy of Sciences 41, n. 2 (29 gennaio 2018): 127–35. http://dx.doi.org/10.3329/jbas.v41i2.35492.
Testo completoAbstract (sommario):
Acute hepatopancreatic necrosis disease (AHPND) of shrimps is a bacterial disease, first appeared in China in 2009 and causes mortality up to 100 % which usually occurs early (within approximately first 35 days) after stocking shrimp fry of black tiger shrimp, Penaeus monodon (Fabricius) and white leg shrimp, Litopenaeus vannamei (Boone). The purpose of this study was to isolate and identify the pathogenic strain of V. parahaemolyticus causing AHPND in cultured shrimps (P. monodon) using molecular techniques. After a disease outbreak in April 2017, shrimp samples were collected from three different locations of south-west shrimp farming region of Bangladesh viz. Satkhira, Khulna and Bagerhat districts. In this study, three selective media were used for primary isolation of V. parahaemolyticus. Among 28 primary isolates, representative14 isolates were checked for the species-specific detection of V. parahaemolyticus using ldh primers and all of them were found to be positive. The isolates were further characterized to check their AHPND positivity using AP3 and AP4 primers. Four isolates showed positive results for both AP3 and AP4 which indicated that the isolates were AHPND positive. This study also report that all AHPND positive strains showed sensitivity to the antibiotics Tetracycline and Nalidixic Acid. The results of this study will help the farmers and policy makers to make plan to protect shrimps from AHPND and thereby sustain the shrimp farming in Bangladesh.Journal of Bangladesh Academy of Sciences, Vol. 41, No. 2, 127-135, 2017
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Rahman, M. Majibur, Farjana Rahman, Farzana Afroze, Farzana Yesmin, Kazi Kaniz Fatema, Kamal Kanta Das e Rashed Noor. "Prevalence of Pathogenic Bacteria in Shrimp Samples Collected from Hatchery, Local Markets and the Shrimp Processing Plant". Bangladesh Journal of Microbiology 29, n. 1 (25 giugno 2016): 7–10. http://dx.doi.org/10.3329/bjm.v29i1.28422.
Testo completoAbstract (sommario):
Export quality frozen shrimps comprise as one of the major economic interests in Bangladesh. During cultivation or processing and packaging, microbial condition is an important issue to maintain the quality of shrimps. Eight shrimp samples, of which, one from hatchery, 3 from local markets and 4 processed export quality samples were studied for microbiological risk assessment (MRA). One hatchery, three market and two export quality shrimp samples were found to contain bacterial pathogens probationary identified as Escherichia coli, Klebsiella spp., Vibrio spp., Aeromonas spp., Pseudomonas spp., Listeria spp., Shigella-like organisms, Staphylococcus aureus, and Salmonella spp. and two other processed export quality shrimp samples were completely free of pathogens of any type. Surprisingly, the later two processed export quality shrimp samples showed antibacterial activity against E. coli, Klebsiella sp. and Vibrio sp.Bangladesh J Microbiol, Volume 29, Number 1, June 2012, pp 7-10
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Chakrabarty, U., S. Dutta, A. Mallik e N. Mandal. "White spot syndrome virus (WSSV) and prevalence of disease resistance in a commercially cultured population of Penaeus monodon Fabricius, 1798 (Decapoda, Dendrobranchiata)". Crustaceana 87, n. 14 (2014): 1593–605. http://dx.doi.org/10.1163/15685403-00003382.
Testo completoAbstract (sommario):
White spot disease (WSD) caused by the white spot syndrome virus (WSSV) is the leading cause for huge economic destruction in the shrimp aquaculture industry. The present study investigates the prevalence of WSSV and disease-resistant shrimps among a commercially cultured population of Penaeus monodon Fabricius, 1798. Results suggest that WSSV prevalence among 32 culture ponds affected by various diseases was 58.2% cumulatively in 2009 and 2010. Real-time PCR yielded 1.46 × 108, 1.94 × 106 and 3.6 × 104 copies of WSSV per μg of genomic DNA of shrimp in severe, moderate and low infected shrimps, successively. Among the shrimps collected, the prevalence of disease resistance was 31.4% and 37.1% consecutively in 2009 and 2010. It was found that 34% of the shrimps were disease resistant while considering both years. This study shows the importance of using disease-resistant seeds for better shrimp health management.
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Baladrat, Nur Komariah, Moch Nurhudah e Heny Budi Utari. "Immune Response of White Shrimp (Litopenaeus vannamei) to Different Density and IMNV Challenge". Jurnal Ilmiah Perikanan dan Kelautan 14, n. 1 (27 febbraio 2022): 83–92. http://dx.doi.org/10.20473/jipk.v14i1.31468.
Testo completoAbstract (sommario):
Highlight ResearchWhite shrimp (Litopenaeus vannamei) challenged with IMNV and different stocking densitiesThe water quality parameter values are getting worse along with the increase in stocking densityWhite shrimp THC value decreased with increasing stocking density and IMNV challenge testThe development of the IMNV increased with an increase in stocking density seen from the speed and percentage of the appearance of the clinical symptoms and histopathology results AbstractIncreasing in stocking density of shrimp affects the physiology and behaviour of their moving space. The health condition of shrimp is influenced by feeding, growth, and its susceptibility on disease. The aim of this study was to determine the development of immune response in relation to density and the presence of IMNV infection. This study used a completely randomized design (CRD) at density of 100 shrimp.m-2, 200 shrimp.m-2, and 400 shrimp.m-2, with three replications in each treatment. The shrimp used was 5,02±0,26 g and the virus infection was exposed orally. This research was facilitated at the Disease Research Centre Laboratory of Central Proteina Prima Company, Pasar Kemis, Tangerang for 30 days. The results showed that the Total Hemocyte Count (THC) in hemolymph of shrimp had different values between negative controls and challenged IMNV. The lowest THC value was found at a density of 400 shrimp m-2 (3.00x106ml-1). While the highest THC value was at a density of 100 shrimp.m-2 (4.75x106ml-1). This result is supported by the increasing value of water quality parameters along with the increasing density of shrimp. Histopathology changes on skeletal muscle and lymphoid organs confirmed that the development of IMNV infection was faster at high shrimp densities.
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Larsen, Roger B., Bent Herrmann, Manu Sistiaga, Jesse Brinkhof, Ivan Tatone e Lise Langård. "New approach for modelling size selectivity in shrimp trawl fisheries". ICES Journal of Marine Science 75, n. 1 (10 luglio 2017): 351–60. http://dx.doi.org/10.1093/icesjms/fsx117.
Testo completoAbstract (sommario):
Abstract In the deep sea trawl fishery targeting shrimp (Pandalus borealis) and other cold-water shrimp species, fishers often use a Nordmöre sorting grid ahead of a small mesh codend to avoid bycatch. However, small fish can pass through the grid and are subsequently retained in the codend. This makes shrimp size selection complex and the size-dependent curve for both the shrimp and the bycatch species often exhibits a bell-shaped signature. In this study we developed a new model and method to estimate size selection in this fishery, conducted fishing trials in the Northeast Barents Sea, and applied the new method to quantify the individual and combined size selection of the Nordmöre grid and codend for deep water shrimp and two bycatch species. The size selectivity for both bycatch species showed the expected bell-shaped signature with low retention probability of very small and larger fish. The Nordmöre grid had high passage probability for all sizes, although it decreased slightly for the largest shrimps. The smallest shrimps were released by the codend.
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Miyasaka, Hitoshi, Aoi Koga, Yusaku Tani, Ken-ichi Ozaki, Takaaki Maki, Shuhei Hayashi e Shinjiro Yamamoto. "The effects of a marine photosynthetic bacteria Rhodovulum sulfidophilum on the growth and survival rate of Marsupenaeus japonicus (kuruma shrimp)". SDRP Journal of Aquaculture, Fisheries & Fish Science 3, n. 2 (2021): 245–49. http://dx.doi.org/10.25177/jaffs.3.2.ra.10713.
Testo completoAbstract (sommario):
The sustainability of the shrimp aquaculture depends largely on disease control and the health status of shrimp. Probiotics, which make shrimps healthier and more resistant to pathogens, are promising countermeasure for shrimp diseases. In this study, the effects of the marine purple non-sulfur photosynthetic bacterium (PNSB) Rhodovulum sulfidophilum on Marsupenaeus japonicus (kuruma shrimp) growth and survival were examined in 177 m2 aquaria (140 tons of water) for 70 days. The shrimp received feed containing 0.01 % fresh weight (106 colony forming unit/g) of R. sulfidophilum cells. The survival rate significantly improved (P < 0.001) (R. sulfidophilum-fed = 81.9 %; control = 71.5 %), the feed conversion rate improved (R. sulfidophilum-fed = 1.83; control = 2.11), and there was no difference in the shrimp average body weight. The approximate bacterial cell cost was $0.003 to $0.005 per 1 kg feed, indicating that the R. sulfidophilum approach is economically feasible and a promising candidate for probiotic bacteria in shrimp aquaculture. Keywords: photosynthetic bacteria, Rhodovulum sulfidophilum, Marsupenaeus japonicus, shrimp, probiotics
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Sen, BR, T. Islam, K. Alam e F. Hassan. "Performance of exporting shrimps and dry fishes from Bangladesh". Journal of the Bangladesh Agricultural University 14, n. 1 (10 dicembre 2016): 69–74. http://dx.doi.org/10.3329/jbau.v14i1.30599.
Testo completoAbstract (sommario):
This study shows the present status of exporting shrimps and dry fishes from Bangladesh in the pre-and -post liberalization period, estimates the growth rate and instability of exporting shrimps and dry fishes for earnings, quantity & price for five years. Recent status presents that farming of shrimp and processing of dry fish are increasing over the year. Status of exporting shrimp & dry fish (value, volume & price) are decreasing in recent years compared to previous years. The overall estimated growth of exported shrimp and dry fish (value) were found 19.48% and 16.53% and (volume) were found 11.52% and 12.86%, respectively. On the other hand, overall estimated export growth of shrimp & dry fish (price) were 175.94% and 37.58%, respectively. Instability in shrimp export earnings was found the highest in period I which was 62.16% and the lowest in period II which was 12.56%. Dry fish export instability was the highest for period I which was 128.08% & the lowest percentage was 54.49% in period II. Instability in quantity export of shrimp was found the highest in period I at 63.29% whereas it was 155.92% in period I for dry fish export and the lowest percentage for both were 14.5% & 48.66% in period II, respectively. On the other hand, instability in prices of exported shrimp & dry fish were found the highest in period I which were 25.26% & 140.63%, respectively. The lowest percentage for shrimp in period II which was 11.29% and for dry fish it was 63.56% in period III. It also affects export of shrimp & dry fish from Bangladesh. The circumstances of shrimp & dry fish export demand different institutional supports to enhance the marketing activities and to strengthen the competitive position in the international market with a view to ensuring more contribution to our economy.J. Bangladesh Agril. Univ. 14(1): 69-74, June 2016
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Kuo, Tzu-Hsin, e Chuan-Chin Chiao. "Learned valuation during forage decision-making in cuttlefish". Royal Society Open Science 7, n. 12 (dicembre 2020): 201602. http://dx.doi.org/10.1098/rsos.201602.
Testo completoAbstract (sommario):
Decision-making, when humans and other animals choose between two options, is not always based on the absolute values of the options but can also depend on their relative values. The present study examines whether decision-making by cuttlefish is dependent on relative values learned from previous experience. Cuttlefish preferred a larger quantity when making a choice between one or two shrimps (1 versus 2) during a two-alternative forced choice. However, after cuttlefish were primed under conditions where they were given a small reward for choosing one shrimp in a no shrimp versus one shrimp test (0 versus 1) six times in a row, they chose one shrimp significantly more frequently in the 1 versus 2 test. This reversed preference for a smaller quantity was not due to satiation at the time of decision-making, as cuttlefish fed a small shrimp six times without any choice test prior to the experiment still preferred two shrimps significantly more often in a subsequent 1 versus 2 test. This suggests that the preference of one shrimp in the quantity comparison test occurs via a process of learned valuation. Foraging preference in cuttlefish thus depends on the relative value of previous prey choices.
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He, Pingguo, e Vincent Balzano. "Reducing the catch of small shrimps in the Gulf of Maine pink shrimp fishery with a size-sorting grid device". ICES Journal of Marine Science 64, n. 8 (26 luglio 2007): 1551–57. http://dx.doi.org/10.1093/icesjms/fsm098.
Testo completoAbstract (sommario):
Abstract He, P., and Balzano, V. 2007. Reducing the catch of small shrimps in the Gulf of Maine pink shrimp fishery with a size-sorting grid device. – ICES Journal of Marine Science, 64: 1551–1557. Since implementation of the Nordmøre grid in the Gulf of Maine pink shrimp (Pandalus borealis) trawl fishery in the early 1990s, fish bycatch has been reduced drastically. However, the Nordmøre grid does not reduce the amount of small shrimps landed when the shrimps are on the fishing grounds. This paper reports on two designs of a new size-sorting grid system, one with a funnel and one without. The designs' main feature is the size-sorting grid's position, installed in front of the main Nordmøre grid. They were tested in the flume tank and at sea. Parallel tows involving two vessels and alternating tows using one vessel were made to compare the size-sorting grid system. Both size-sorting designs reduced the number of small shrimps in the catch significantly, by 38 and 45 kg−1 of catch, respectively. There was some reduction in shrimp catch rates, presumably from the release of small shrimps. There were no significant differences in the number or quantity of major bycatch species for the commercial grid and the two experimental grid designs. The designs were practical to operate and easy to install. Their application could reduce the catch of small shrimps in the pink shrimp fishery in the Gulf of Maine and in other areas.
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Kaspers, Sebastian, e Andreas Kunzmann. "INFLUENCE OF FISH MEAL REDUCTION, ALGAE ADDITION, AND ENZYME USE IN SHRIMP FEEDS ON THE TISSUE COMPOSITION OF Litopenaeus vannamei". Indonesian Aquaculture Journal 7, n. 1 (30 giugno 2012): 37. http://dx.doi.org/10.15578/iaj.7.1.2012.37-47.
Testo completoAbstract (sommario):
At the Leibniz-Center for Tropical Marine Ecology in Bremen, Germany, shrimps (Litopenaeus vannamei) fed feeds with reduced fish meal content, algae and enzyme additions were analysed for their tissue composition. Contents of protein, glycogen, total lipid, linoleic acid (LA), alpha linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) of the shrimp abdomen and of the respective feeds were determined. Reduction of fish meal (FM) content in shrimp feed and its substitution with “mash” (grain distillery waste-”Schlempe”), corn gluten, pea or coarse colza meal did not influence the tissue composition. Additional inclusion of an algae mixture out of Spirulina spp., Phaeodactylum spp., and Tetraselmis spp. to shrimp feeds as well as the single inclusions of Phaeodactylum spp. or Spirulina spp. had no effect on the tissue composition. Furthermore no improvement of the quality of the shrimps due to an enhanced digestibility of mash by enzymes (mixture of corolase, phytase, xylanase) could be detected. In contrast the quality of shrimps seemed to be negatively affected by enzymes in this study. These findings could contribute to making shrimp aqua farming more economic as reduction of feed costs without reduction of the quality of the shrimps would be a large benefit.
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Ersan, Ali, e Nurcan Tugrul. "The drying kinetics and characteristics of Shrimp dried by conventional methods". Chemical Industry and Chemical Engineering Quarterly, n. 00 (2020): 50. http://dx.doi.org/10.2298/ciceq201114050e.
Testo completoAbstract (sommario):
The main purpose of this study was to research the influence of different drying methods on the physical and quality properties of dried shrimps. Shrimps were dried with conventional methods at 60, 70 and 80?C between 330 to 210 minutes and 190 to 110 minutes, in an oven and vacuum oven respectively. Drying time is shortened with the use of vacuum pump. The drying kinetics of the shrimp were studied, and effective moisture diffusion and activation energy were calculated for both methods. The Alibas model and the Midilli & Kucuk model provided the best experimental data with a high coefficient of determination (R2) for oven and the vacuum-oven techniques, respectively. The final dried products were characterized by investigating the colour characteristics, heavy metal content and by carrying out protein analyses. Rehydration ratio was also determined for the dehydrated shrimps. Drying conditions affected the colour features so that shrimps dried in ovens and vacuum ovens showed an increase in brightness and yellowness values and decrease in redness values. The concentration of As, Pb, Cd, Hg, Cu, Zn and Fe in the dried shrimp were within acceptable limits. The protein content of dried shrimp (~85%) is higher than undried shrimp (~20%).
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Priadana, Adri, e Aris Wahyu Murdiyanto. "Shrimps clusterization by size using digital image processing with CCA and DBSCAN". Jurnal Teknologi dan Sistem Komputer 8, n. 2 (14 febbraio 2020): 106–12. http://dx.doi.org/10.14710/jtsiskom.8.2.2020.106-112.
Testo completoAbstract (sommario):
The quality of farmed shrimps has several criteria, one of which is shrimp size. The shrimp selection was carried out by the contractor at the harvest time by grouping the shrimp based on their size. This study aims to apply digital image processing for shrimp clustering based on size using the connected component analysis (CCA) and density-based spatial clustering of applications with noise (DBSCAN) methods. Shrimp group images were taken with a digital camera at a light intensity of 1200-3200 lux. The clustering results were compared with clustering from direct observation by two experts, each of which obtained an accuracy of 79.81 % and 72.99 % so that the average accuracy of the method was 76.4 %.
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Rios, C., R. L. Panini, L. A. Acordi Menezes, F. N. Vieira, D. M. Fracalossi, R. I. Samuels, J. De Dea Lindner e C. P. Silva. "Effects of the substitution of fishmeal with mealworm meal on enzymes, haemolymph and intestinal microbiota of the Pacific white shrimp". Journal of Insects as Food and Feed 7, n. 6 (11 settembre 2021): 1023–33. http://dx.doi.org/10.3920/jiff2020.0148.
Testo completoAbstract (sommario):
Shrimp farming is one profitable sector of aquaculture and the Pacific white shrimp (Litopenaeus vannamei) is the most cultivated species worldwide. Nutrition is considered as one of the greatest challenges in shrimp farming due to its dependence on fishmeal (FM) as an ingredient in the feed. The main goal of the present work was to analyse if the substitution of FM by yellow mealworm (Tenebrio molitor) meal (TM) influences digestive enzyme expression, haemolymph parameters or the intestinal microbiota of shrimp juveniles. Shrimps (average initial weight 4.42±0.02 g) were fed five experimental diets where FM protein was gradually substituted by TM protein (0, 25, 50, 75, and 100%). The shrimps were fed four times per day with an amount equivalent to approximately 6% of their biomass for 42 days. The total haemocyte count, protein concentration and prophenoloxidase activity in the haemolymph were not significantly altered (P>0.05) when FM was substituted by TM. However, the agglutinating activity of shrimp serum determined against dog erythrocytes was higher in the shrimp group fed 25% TM. The absolute and specific activities of trypsin, chymotrypsin, lipase, α-amylase and the patterns of proteolytic activities were not affected by the dietary treatments. The shrimp gut bacterial microbiota profile was similar with the genera Pseudoalteromonas, Rubritalea, Ruegeria, Tenacibaculum, and Vibrio detected. These results show that TM is viable alternative for the replacement of FM, without any deleterious effects on expression of key digestive enzymes, gut microbiota or the immune system of the Pacific white shrimp.
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Maciaszek, Rafał, Aleksandra Jabłońska, Sebastian Prati e Wiesław Świderek. "First report of freshwater atyid shrimp, Caridina formosae (Decapoda: Caridea) as a host of ectosymbiotic branchiobdellidan, Holtodrilus truncatus (Annelida, Citellata)". Knowledge & Management of Aquatic Ecosystems, n. 421 (2020): 33. http://dx.doi.org/10.1051/kmae/2020027.
Testo completoAbstract (sommario):
In recent years, ornamental shrimps gained increasing popularity in the aquarium trade. Unfortunately, they are potential vectors of epibionts, which may be unintentionally introduced to aquaria with imported shrimps. This contribution presents the first report of the occurrence of Holtodrilus truncatus on aquarium freshwater shrimp Caridina formosae. A total of 120 shrimp imported from Taiwan as aquarium pets were examined for the presence of epibionts. Holtodrilus truncatus occurred in 23.3% of shrimps. A total of 29.6% of crustaceans showed signs of damages as a result of H. truncatus activity. The shrimp is not common in the ornamental trade and is not subject to selective breeding. Therefore C. formosae populations available on the market, if not wild-caught, are most likely very similar to those occurring in Taiwanese natural water bodies, where H. truncatus occurs in Neocaridina shrimp. Neocaridina spp. are a known host for this epibiont, and transmission between species might occur in nature as well as in the aquarium trade were densities of animals are often high. The ability of H. truncatus to infect also highly invasive crayfish Procambarus clarkii, might also pose concern for regions where this crustacean is widespread. The actual lack of preventive measures for shrimp epibionts as well as confirmed releases of ornamental crustaceans into new aquatic ecosystems may result in further spread of H. truncatus, a potential new threat to native crustaceans and other epibionts.
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Brinton, Brigette A., e Mary Carla Curran. "The effects of the parasite Probopyrus pandalicola (Packard, 1879) (Isopoda, Bopyridae) on the behavior, transparent camouflage, and predators of Palaemonetes pugio Holthuis, 1949 (Decapoda, Palaemonidae)". Crustaceana 88, n. 12-14 (2015): 1265–81. http://dx.doi.org/10.1163/15685403-00003501.
Testo completoAbstract (sommario):
The bopyrid isopod Probopyrus pandalicola (Packard, 1879) is a large, noticeable, hematophagous ectoparasite of palaemonid shrimps, including the daggerblade grass shrimp Palaemonetes pugio Holthuis, 1949. Bopyrids affect grass shrimp physiology and may also affect predator-prey dynamics. The purpose of this study was to determine whether the isopod affected the behavior and/or camouflage of grass shrimp, thereby altering the predation preferences of the mummichog Fundulus heteroclitus (Linnaeus, 1766). To determine whether the isopod affected predator preference through behavioral and/or camouflage alterations, paired combinations of unparasitized, parasitized, and marked shrimp were presented to mummichogs. One branchiostegite of some of the unparasitized shrimp was marked with black paint to mimic the bopyrid parasite. Mummichog predation preference and shrimp behavior immediately prior to predation events were recorded. All shrimp behavior was classified as motionless, walking, swimming, or backward thrusting. Immediately prior to predation, parasitized shrimp swam more () and backward thrusted less () than unparasitized shrimp. Mummichogs exhibited a preference for the more active shrimp (80.7% of shrimp; ), and also for the less camouflaged (parasitized or marked) shrimp (81.5% of shrimp; ) if there was no difference in shrimp behavior. Parasitized shrimp were preferentially consumed (51/85 shrimp) when paired with unparasitized shrimp (), but not with marked shrimp (). A 30-min activity budget was created for each type of shrimp both in the presence and absence of predators; neither the parasite nor marking affected their behavior over 30 min (). The major finding of this study was that P. pandalicola affected the predation preferences of F. heteroclitus by altering the behavior and/or camouflage of the grass shrimp. Parasitization alters predator-prey dynamics by decreasing the camouflage and the frequency of backward-thrusting behavior by the host when it is threatened by predation, which thereby decreases the ability of shrimp to escape from predators.
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Reddy, Vijay Kumar, Pradnya A. Shinde, Faisal R. Sofi, Piyusha S. Shelar e SB Patange. "Effect of Antimelanotic Treatment and Vacuum Packaging on Melanosis and Quality Condition of Ice Stored Farmed Tiger Shrimp (Penaeus monodon)". SAARC Journal of Agriculture 11, n. 2 (20 marzo 2014): 33–47. http://dx.doi.org/10.3329/sja.v11i2.18400.
Testo completoAbstract (sommario):
The objective of the study was to evaluate the effect of vacuum packaging in combination with antimelanotic treatment on quality characteristics and melanosis in farmed tiger shrimp (Penaeus monodon) collected from Ratnagiri region of Maharashtra. The processed shrimps were treated with sulfite mixture in water (30 g kg-1) and divided into two lots each with 250 shrimps. One of them was vacuum packed, the other was air packed and stored under ice. The ice stored shrimps were analyzed for quality attributes and melanosis for a period of 27 days. The treated vacuum packed shrimps had a shelf life of 24 days, whereas air packed shrimp had 16 days only. Melanosis was absent in the shrimps from both the lots throughout the storage period. Based on the results, it could be concluded that the combination of antimelanotic treatment (sulphite mixture) and packaging could significantly delay the occurrence of melanosis and increase the storage life of shrimp in ice. DOI: http://dx.doi.org/10.3329/sja.v11i2.18400 SAARC J. Agri., 11(2): 33-47 (2013)
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Purwanto, Purwanto. "PERFORMANCE OF A FISHERY HARVESTING DIFFERENT MINIMUM SHRIMP SIZES IN THE ARAFURA SEA". Indonesian Fisheries Research Journal 18, n. 2 (31 dicembre 2012): 79. http://dx.doi.org/10.15578/ifrj.18.2.2012.79-89.
Testo completoAbstract (sommario):
Avoiding overfishing and ensuring the sustainability of the shrimp stock in the Arafura Sea are of prime importance for fishery management. Exploited shrimp stock consists of several cohorts, and grows considerably with age. When the shrimps are caught before the cohort has had the opportunity to achieve its optimum biomass level, the fishery will lose much of the potential benefit that could be achieved by catching them in the near future. Therefore, a bio-economic approach was developed, on the basis of the length-based Thompson & Bell model, to evaluate the impact of harvesting different size of shrimps on fishery performance. The result of analysis shows that the fishery achieved the optimal total profit when the shrimp size at first-capture and fishing mortality were 29 mm CL and 0.50, respectively. The total profit to the fishery would be sub-optimal when the shrimp size at-first-capture was smaller or larger than the optimal size. Further, it was more economical to harvest shrimps at the larger size and higher fishing mortality, and resulting in higher total profit, when natural mortality decreased.
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Idrissa, Kabore, Kabore Boudnoma Laetitia, Bance Victor, Sawadogo Lassane e Oueda Adama. "KNOWLEDGE OF SHRIMPS COMPOSITION AND THEIR IMPLICATION IN FOOD SECURITY IN DRYLAND AREA IN BURKINA FASO (WEST AFRICA)". International Journal of Advanced Research 11, n. 05 (31 maggio 2023): 628–39. http://dx.doi.org/10.21474/ijar01/16915.
Testo completoAbstract (sommario):
In West Africa, particularly in Burkina Faso, shrimp are an important natural resource with high economic and nutritional value for rural populations. However, the knowledge of shrimp composition and their potential use in fisheries are still very limitedin Burkina Faso. To fill this gap,we examined the shrimps composition and addressed their potentiality in fisheries, and for farming in Burkina Faso. To do so, keys environmental variables were measured, and shrimp were collected using a hand net and a cast net, and identified using taxonomic manuals and keys. From our findings, seven species belonged to genus (Macrobrachium) were identified, with two more species reported for the first time in Burkina Faso. The results showed that dryland lakesbear a high shrimps species richness due to good habitats conditions, and many efforts need to be done to boost shrimps production, both artificially and naturally in rural areas of Burkina Faso,where hunger and malnutrition are the recurrent issues.Thus, the implementation of water resources policy by promotingcrustaceans fisheries, encouragingscientific researches and providing technical and financial supportsmightbe the future challenges for scientists and policy makersto boost shrimp fisheries and cultivation for the well-being of poor population in rural areas.