Journal articles on the topic 'Zooplankton'
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AKHTAR, NAVEED, SARA HAYEE, FAHEEM NAWAZ, AMIR NADEEM, ABDUL QAYYUM KHAN SULEHRIA, and FARAH ASHFAQ. "IMPACTS OF PHYSICOCHEMICAL PARAMETERS ON ZOOPLANKTON BIODIVERSITY RECORDED FROM SAFARI ZOO LAKE LAHORE, PUNJAB, PAKISTAN." Pakistan Journal of Emerging Science and Technologies (PJEST) 3, no. 2 (2023): 1–12. http://dx.doi.org/10.58619/pjest.v3i2.75.
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Zooplanktons are an integral part of any water reservoir, whether freshwater or marine. They are linked in food chains and the food web of a water ecosystem. Some zooplanktons are food for other zooplankton types. The diversity and density of these creatures are affected by eutrophication and changes in Physico-chemical parameters. Some species of zooplanktons are found in eutrophic water bodies. They are important bio-indicators, and their presence reflects the eutrophic condition of any water body. These organisms have a worldwide distribution, playing a pivotal role in shaping the whole community structure of any water reservoir and unfolding the close connections of various trophic levels. The present study explores the density and diversity of various types of zooplankton found in Safari Zoo Lake, Lahore. The study on an artificial lake with lesser water replacement pictured different zooplankton groups, including copepod, tintinnids, cladoceran and rotifers with many larger animals, which affected the overall zooplankton population. Since Physico-chemical parameters also affect the density and diversity of zooplankton, water samples were collected to measure various parameters every month. A very low density and diversity of zooplanktons were recorded during this study, where rotifers were the most abundant. The lake condition showed eutrophication getting support from bio-indicator species like Brachionus calyciflorus.
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Pathak, S. K., and Sandhya Kshetrey. "Seasonal trends in physico-chemical parameters and zooplankton in a freshwater reservoir of Dejla Dewada, Khargone, M.P." Environment Conservation Journal 15, no. 1&2 (June 18, 2014): 225–28. http://dx.doi.org/10.36953/ecj.2014.151232.
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Seasonal variation in physico-chemical and zooplankton communities of Dejla Dewada Reservoir (D.D.R.), West Nimar district (Khargone) was studied during October 2009 to September 2010. Protozoa, Rotifera, Copepoda, Cladocera and Ostrcoda were found dominated zooplanktonic groups. The total zooplankton density ranged between 879 unit/L to 2980 unit/L.The composition of zooplankton was found as Protozoa >Rotifera>Copepoda>Cladocera>Ostracoda.
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Vairagade S. P. "A Review on Zooplankton Diversity with Reference to Physico-Chemical Parameters of Lentic Ecosystems in Maharashtra." International Journal of Scientific Research in Science and Technology 11, no. 2 (April 2, 2024): 37–48. http://dx.doi.org/10.32628/ijsrst524111103.
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Zooplanktons are diverse organisms, are found more or less in all water bodies. The plankton research is a highly helpful technique for determining the biotic potential of water bodies and adds to the overall calculation of their biotic nature and general economic potential. Zooplanktons are microscopic, free-floating organisms that are essential to the functioning of aquatic ecosystems. As the most crucial link in the energy transfer between phytoplankton and higher aquatic animals, zooplanktons are significant biotic components and play a significant role in the aquatic environment. The functioning of an aquatic ecosystem's food chains, food webs, energy flow, and nutrient cycling are all influenced by zooplankton. Zooplankton populations are excellent indicators of the stability of the food chain. Numerous environmental parameters, including pH, temperature, salinity, oxygen, and others, have an impact on zooplankton. The food chain and the flow of energy between the primary and tertiary trophic levels are both significantly influenced by zooplankton. They serve as indicators of the physical, chemical, and biological processes occurring in aquatic systems due to their high densities. Because they are highly sensitive to environmental change, changes in the abundance of certain species or in the makeup of certain communities can be used to gauge the health of the environment. An assessment of the literature on zooplanktons in Indian lentic water has been done in the current work, which has long been deemed necessary in this subject.
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Khan, Saleha, Sunzida Sultana, Sadia Momota Hena, Md Sayem Ahmed, Most Sanjida Sultana, Most Suraiya Nisha Akhi, Yahia Mahmud, and Md Moazzem Hossain. "Seasonal dynamics of zooplankton in a eutrophic fish pond of Bangladesh in relation to environmental factors." Journal of Aquaculture & Marine Biology 12, no. 2 (2023): 129–36. http://dx.doi.org/10.15406/jamb.2023.12.00365.
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Zooplankton is crucial for transmitting energy from primary producers to higher trophic levels. A study was done in a Bangladesh eutrophic fish pond to know zooplankton's seasonal dynamics in relation to environmental factors. There were 11 different zooplankton genera, which belong to three major classes: Copepoda, Rotifera, and Cladocera. Peak abundance of zooplankton was found in the spring and winter, respectively. Cluster analysis clearly indicated zooplankton abundance during the spring and winter. Rotifera was the main dominant group in the total zooplankton population. Copepoda and Cladocera had a lower abundance than those of Rotifera. During the study period, environmental factors were observed monthly. The total zooplankton abundance showed a positive correlation only with pH and a negative correlation with transparency, dissolved oxygen, phosphates, nitrates, and temperature during Pearson’s correlation coefficient analysis. The canonical correspondence analysis also indicated that pH, transparency, and temperature significantly affect the abundance of zooplankton groups. Therefore, further research on the influence of environmental factors on different species of zooplankton is strongly suggested for achieving sustainable fish production from eutrophic fish ponds.
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Bulut, Hilal, and Serap Saler. "Murat Nehri’nin (Elazığ-Palu İlçe Merkezi Sınırları İçindeki Bölümün’de) Zooplanktonu ve Değişimi." Turkish Journal of Agriculture - Food Science and Technology 2, no. 1 (January 10, 2014): 13. http://dx.doi.org/10.24925/turjaf.v2i1.13-17.32.
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Zooplankton of Murat River was examined from monthly taken samples between June 2011 and May 2012. As a result of research were identified total 33 species, 25 of them belong to Rotifera, 6 belong to Cladocera, 2 belong to Copepoda. Zooplanktonik species were comprised as 75.76% Rotifera 18.18% Cladocera and 6.06% Copepoda species. There was marked decrease in at the zooplankton species diversity in winter months. There was sharp increase at the zooplankton species diversity in spring and in summer months. Especially in spring month’s zooplankton were recorded in highest species and numbers individual. The most species were determined in April (nine species). At least species were determined January (four species). pH, dissolved oxygen, water temperature were measured of the study area. The study has got an importance as to be the first research on zooplankton in this area.
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Espincho, Francisca, Rúben Pereira, Sabrina M. Rodrigues, Diogo M. Silva, C. Marisa R. Almeida, and Sandra Ramos. "Assessing Microplastic Contamination in Zooplanktonic Organisms from Two River Estuaries." Water 16, no. 7 (March 29, 2024): 992. http://dx.doi.org/10.3390/w16070992.
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The present work aims to evaluate the MP contamination of zooplankton and its impact on MP trophic transfers at the lower levels of the food web in a field study. During 1 year, seasonal surveys were conducted to collect zooplankton and water samples from different sites in two estuaries, the Douro and Lima estuaries (NW, Portugal). The zooplankton was quantified and identified into major zooplanktonic groups. Dedicated protocols that had been previously optimized were used to assess the MP presence in the water samples and in two of the most abundant zooplankton groups (copepods and chaetognaths). The results showed the presence of MPs in all water samples, with similar MP concentrations in both estuaries (Lima: 2.4 ± 2.0 MPs m−3; Douro: 2.3 ± 1.9 MPs m−3). In general, no temporal or spatial variations were observed. Fibres, blue and of a small size (<1 mm), were the most common characteristics of the MPs found in the water and zooplankton, indicating that water can be a source of MPs for zooplankton. Chaetognatha exhibited higher MP contamination in the Lima (2.9 ± 3.1 MPs ind−1) and Douro (2.0 ± 2.8 MPs ind−1) estuaries than Copepoda, which tended to have lower levels of MP contamination (Lima: 0.95 ± 1.12 MPs ind−1; Douro: 1.1 ± 1.2 MPs ind−1). Such differences in the MP concentrations between these two categories of zooplanktonic organisms indicate a possible MP trophic transfer at the lower levels of the food web. The results highlight the novel possibility of an MP trophic transfer in zooplankton and the need to fully assess the impacts of MPs in real scenarios.
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Silveyra-Bustamante, Angel Antonio, Jaime Gómez-Gutiérrez, Eduardo González-Rodríguez, Carlos Sánchez, Agustín Schiariti, and María A. Mendoza-Becerril. "Seasonal variability of gelatinous zooplankton during an anomalously warm year at Cabo Pulmo National Park, Mexico." Latin American Journal of Aquatic Research 48, no. 5 (November 1, 2020): 779–93. http://dx.doi.org/10.3856/vol48-issue5-fulltext-2441.
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The seasonal variability of gelatinous zooplankton (siphonophores, medusae, and thaliaceans) abundance was investigated at Cabo Pulmo National Park (CPNP) from weekly zooplankton samples collected throughout 2014. The Gulf of California had prolonged warming during 2009-2019, with 2014 as the anomalously warm year preceding El Niño 2015-2016 compared to the 2003-2020 SST time series. Gelatinous zooplankton accounted <1% of the entire zooplankton community abundance at CPNP during 2014, suggesting a low influence of predation pressure upon their zooplanktonic and micronekton preys. Siphonophores (57%), thaliaceans (42%), and medusae (1%) were present throughout the year. The abundance of gelatinous zooplankton had a significant negative association with sea surface temperature and a positive association with sea surface chlorophyll-a concentration and velocity and direction of the wind, increasing their abundance during October after the hurricane season. The gelatinous zooplankton species assemblage at the coastal CPNP was similar but less abundant than the gelatinous zooplankton species assemblage observed in the oceanic region of the southern Gulf of California during summer 2014. Tropical species Diphyes dispar, Abylopsis tetragona, Chelophyes contorta, and Thalia spp. numerically dominated the gelatinous zooplankton community associated with a regional heatwave period recorded during 2014. A high proportion of tropical zooplankton indicates that mesotrophic conditions sustain the current high biomass and diversity of nektonic and benthonic planktophagous fauna inhabiting CPNP. However, prolonged warming events might decrease zooplankton biomass in the southern region of the Gulf of California in the future.
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C., Kishor, O. R. Nataraju, Venkatappa ., and A. T. Ramachandra Naik. "Zooplankton Abundance and Growth of Carps in Farm-Ponds of Different Agro-Climatic Zones of Karnataka." Environment and Ecology 41, no. 3D (September 2023): 2129–34. http://dx.doi.org/10.60151/envec/lejp5402.
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Availability of planktons / natural fish food plays an important role in getting better growth of fish from farm ponds. Study was carried out to evaluate the zooplankton community and growth performance of Carp fishes in farm ponds of coastal and malnad agro-climatic regions of Karnataka. All the ponds were manured with cowdung and poultry manure @ 2000 kg/ha. for the production of planktons. Catla, Rohu and common carp fingerlings were stocked in all the ponds @ 10,000 nos. /ha in 1:1:1 ratio and fishes were fed with groundnut oil cake and rice bran (in 1:1 ratio) @ 5% of the body weight every day. The water samples from all the ponds were collected and filtered for zooplanktons using nylon bolting cloth (60 µm). The growth of fishes in terms of weight was recorded. The analyzed zooplankton planktons were classified into 5 class’s viz., Rotifera, Protozoa, Copepoda, Cladocera and Ostracod. Among zooplanktons observed, copepod contributed maximum to zooplankton community followed by rotifers, cladocerans and ostracod. In coastal ponds the average maximum number of zooplankton 10,368 Cells/m3 and minimum number of 176 Cells/m3 were observed. In Malnad ponds the average maximum number of zooplankton 21,797 Cells/m3 and minimum number of 1579 Cells/m3 were observed. The average maximum growth of Catla, Rohu and Common carp was observed in coastal ponds were 884.42, 640.1 and 692.27 gms respectively and in Malnad farm ponds 1080.71, 954.19 and 1023.18 gms respectively. Use of cowdung and poultry manure in combination was found useful for getting better growth in farm ponds of both the regions.
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Keast, Allen. "Planktivory in a Littoral-Dwelling Lake Fish Association: Prey Selection and Seasonality." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 6 (June 1, 1985): 1114–26. http://dx.doi.org/10.1139/f85-138.
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A littoral zone assemblage of six planktivorous fishes (Pimephales notatus, Notropis heterodon, Fundulus diaphanus, Lepomis macrochirus, Ambloplites rupestris, Perca flavescens), and five zooplankter species, was analysed relative to three hypotheses concerning prey consumption: (1) Size-dependent predation will operate, as elsewhere. (2) Small-bodied planktivores, unable to handle larger prey, will take the most abundant zooplankter and not show species specialization. (3) The strongly cyclical nature of zooplankton populations will not permit fish species to specialize exclusively on zooplankton; there will be a negative correlation between zooplankton numbers and use of alternative prey, and at this time the planktivores will minimize competition by choosing different alternative prey. The first hypothesis was supported, the second and third partially so. The small specialist planktivores, P. notatus and N. heterodon, did not take the commonest small zooplankter, Bosmina longirostris: rather, they specialized largely on Chydorus sphaericus, feeding on it even when rare. Lepomis macrochirus, a generalise took largely B. longirostris, No species was exclusively planktivorous. The species only partly differed in alternative prey types eaten. Chironomid larvae were a regular item of diet of most species.
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Soni, Hiren B., and Sheju Thomas. "Occurrence of zooplanktons at Sacred Palustrine Habitat, Central Gujarat, India, with conservation and management strategies." International Journal of Environment 3, no. 1 (February 28, 2014): 111–21. http://dx.doi.org/10.3126/ije.v3i1.9948.
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The aim of the present study was to represent the zooplankton composition of Sacred Palustrine Habitat (SPH), Anand District, Central Gujarat, India. Collections of zooplanktons were carried out at three permanent sampling stations at fortnight intervals over one year period covering three consecutive seasons from June 2012 to May 2013. The zooplankton population was represented by a total of 29 genera and 31 species bestowed by 12 species of Ciliophora, followed by Rhizopoda (6), Zooflagellata (5), Rotifera (4), Cladocera (2), Copepoda and Ostracoda (1) each. Of the total 31 species of zooplanktons, nine species were abundant, 11 were common, and 12 were rare. The present paper discusses the population profile of zooplanktons in waters of SPH with suggested conservation and management strategies. DOI: http://dx.doi.org/10.3126/ije.v3i1.9948 International Journal of Environment Vol.3(1) 2014: 111-121
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Andradi-Brown, Dominic A., Catherine E. I. Head, Dan A. Exton, Christina L. Hunt, Alicia Hendrix, Erika Gress, and Alex D. Rogers. "Identifying zooplankton community changes between shallow and upper-mesophotic reefs on the Mesoamerican Barrier Reef, Caribbean." PeerJ 5 (January 5, 2017): e2853. http://dx.doi.org/10.7717/peerj.2853.
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Mesophotic coral ecosystems (MCEs, reefs 30–150 m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fishes. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs. However, the abundance of larger bodied (>2 mm) zooplanktonic groups, including decapod crab zoea, mysid shrimps and peracarid crustaceans, was higher on MCEs than shallow reefs. Our findings highlight the importance of considering zooplankton when identifying broader reef community shifts across the shallow reef to MCE depth gradient.
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Sadia, Nurany, Md Kawser Ahmed, Md Moniruzzaman Khondkar, Seema Rani, Md Jobaer Alam, Ahmad Al Karim, and Makidul Islam Khan. "Horizontal and Vertical Distribution and Abundance of Zooplankton around the Swatch-of-No-Ground of Northern Bay of Bengal." Dhaka University Journal of Earth and Environmental Sciences 10, no. 2 (January 19, 2022): 1–8. http://dx.doi.org/10.3329/dujees.v10i2.57510.
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This study assessed horizontal and vertical distribution and abundance of zooplankton community in water samples collected from 26 stations at a depth of 0 to 250 m of the northern Bay of Bengal. A total of 55 zooplankton species were identified where Copepod was 72.41% and Ciliophora was 8.62%. Among the Copepod, 48%, 40% and 12% of species were Calanoid, Cyclopoid and Harpacticoid Copepod, respectively. This study also found 2 species of Decapod, 2 species of Rotifer, 2 species of Cladocera, 1 species of Chaetognatha and 1 species of Stomatopoda. Spatial distribution of zooplankton species was varied from station to station and cruise to cruise. Maximum 23,868 individuals of zooplanktons were recorded in cruise 2, whereas the lowest number (758 individuals) was found in cruise 4. Zooplankton abundance was ranged between 18 to 22,500 cells/L in all cruises, whereas the highest abundance was found in cruise 2 and the lowest was recorded in cruise 4. The highest abundance (37,310 individuals) was documented at surface water and the lowermost number of zooplankton (10 individuals) was recorded at 100 m depth. This study showed negative correlation between zooplankton abundance and water depth. The results of the current study might help to understand zooplankton abundance and distribution in the northern Bay of Bengal and will use as a baseline study for further research. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 10(2), 2021, P 1-8
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Sen Gupta, Subhasree. "Biomonitoring the status of aquatic bodies using zooplankton as surrogate species amidst urban landscape." Holistic approach to environment 12, no. 4 (September 19, 2022): 144–54. http://dx.doi.org/10.33765/thate.12.4.2.
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The concept of surrogates in biodiversity assessments has been widely accepted in the recent years. Surrogates are taxonomic groups that indicate the overall biodiversity at a particular site. Zooplankton is an important component of the aquatic ecosystem, playing a major role in energy transfer between the phytoplankton or producers and the consumers at higher trophic levels. In this study zooplanktons were considered as surrogates for biomonitoring status of two aquatic bodies amidst urban landscape at the southern fringes of Kolkata, West Bengal, India through different seasons. Zooplankton diversity and abundance was found to vary with seasons in both the ponds in correlation with limnological parameters. Pond 1 was found to be larger in size, having partial macrophyte cover in comparison with Pond 2 which is smaller and devoid of any macrophyte cover over the study period. The Pond 1 elucidated higher diversity of zooplankton having higher water pH and phosphate concentration and less nitrite concentration. Pond 2 elaborated less zooplankton diversity with lower pH, less phosphate and higher nitrite concentration. Diversity and abundance of zooplankton surrogates provided valuable information about the status of water bodies amidst urban landscape and can be utilised as a tool for biomonitoring.
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Anyanwu, E. D., O. G. Adetunji, and S. N. Umeham. "Water quality and zooplankton community of the Eme River, Umuahia, Southeast Nigeria." Limnology and Freshwater Biology, no. 5 (2021): 1186–94. http://dx.doi.org/10.31951/2658-3518-2021-a-5-1186.
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Abstract. Aquatic ecosystems and biota are often adversely affected by anthropogenic activities. Consequently, zooplanktons have been used to monitor anthropogenic impacts because of their sensitivity to their environment. Water quality and zooplankton community of the Eme River, Umuahia, was assessed between December 2017 and November 2018. The study was carried out in six stations in relation to human activities. Human activities in the watershed were dominated by sand mining. A quantitative filtration method was used for the zooplankton sample collection while standard sample collection and analytical methods were used for the water samples. The zooplankton species recorded were 27 while the most abundant zooplankton group was Rotifera. A known pollution indicator, Daphnia pulex, had the highest number of individuals. The effects of human activities in the watershed were reflected in the results of some of the physicochemical parameters of the river. The zooplankton assemblage and community structure also reflected the effects of human activities in the river. Combined effects of human activities and season contributed to the relatively low zooplankton abundance recorded particularly in some downstream stations. The impacts of sand mining on water quality and zooplankton were more remarkable in the downstream stations (4 6) where the activity was intense while a large number of children swimming and related activities during the dry season had some impacts in station 1. The dominance of indicator and tolerant species indicated that the river was undergoing eutrophication. Sand mining among other observed anthropogenic activities was a major contributor to the nutrient enrichment in the river. The major water quality parameters influencing the zooplankton community structure was revealed by canonical correspondence analysis.
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Nguyen, Quoc Viet, and Triet Tran. "EXOTIC ZOOPLANKTONS IN SHIP BALLAST WATER ARRIVED AT SAIGON PORTS 2008-2009." Science and Technology Development Journal 14, no. 4 (December 30, 2011): 50–60. http://dx.doi.org/10.32508/stdj.v14i4.2036.
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Zooplanktons in ship ballast water is an important factor in marine bioinvasion. From September 2008 to January 2009, two hundreds ballast water samples were collected from oversea ships arrived at Sai Gon port. Results of taxonomical analysis identified 43 zooplankton taxa, 5 groups of shrimp larvae, crabs, polychaeta and 1 unidentified species. Among the zooplankton species identified, there were 9 species that were not seen in Viet Nam from previous studies. They are Pseudodiaptomus clevei, Bestiolina sp., Pseudodiaptomus sp., Harpacticus sp., Amphiascus sp., Jalysus sp., Hemicyclops sp., Kelleria sp., Stephos sp. and one unidentified species.
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Sontakke, Gajanan, and Satish Mokashe. "Diversity of zooplankton in Dekhu reservoir from Aurangabad, Maharashtra." Journal of Applied and Natural Science 6, no. 1 (June 1, 2014): 131–33. http://dx.doi.org/10.31018/jans.v6i1.388.
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Zooplanktons by their heterotrophic activity play a key role in the cycling of organic materials in aquatic ecosystems and are used as bioindicators of environmental quality. The present study was carried out from February 2009 to January 2010 which deals with diversity and abundance of zooplankton in Dekhu reservoir from Aurangabad district. A total 25 species of zooplankton were recorded in which rotifers were more abundant with 11 species followed by copepods and cladocerans 6 species each and 2 species of Ostracods. Results indicated that Dekhu reservoir is more productive.
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Kitamura, M., Y. Kumamoto, H. Kawakami, E. C. Cruz, and K. Fujikura. "Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean." Biogeosciences Discussions 10, no. 4 (April 2, 2013): 6143–70. http://dx.doi.org/10.5194/bgd-10-6143-2013.
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Abstract. The magnitude of the 9.0 Tohoku earthquake and the ensuing tsunami on 11 March 2011, inflicted heavy damage on the Fukushima Dai-ichi nuclear power plant (FNPP1). Fission products were emitted, falling over a broad range in the northern hemisphere, and water contaminated with radionuclides leaked into the ocean. In this study, we described the horizontal distribution of the Fukushima-derived radiocesium in zooplankton and in seawater in the western North Pacific Ocean (500–2100 km from the FNPP1) 10 months after the accident. 134Cs and 137Cs were detected in zooplankton and seawater from all the stations. Because of its short half-lives, 134Cs detected in our samples could only be derived from the FNPP1 accident. The highest 137Cs activity in zooplankton was same order of magnitude as that one month after the accident, and average activity was one or two orders of magnitude higher than 137Cs activities observed before the accident around Japan. Horizontally, the radiocesium activity concentrations in zooplankton were high at around 25° N while those in surface seawater were high at around the transition area between the Kuroshio and the Oyashio Currents (36–40° N). We observed subsurface radiocesium maxima in density range of the North Pacific Subtropical Mode Water and occurrence of many diel vertical migratory zooplanktons. These suggested that the high activity concentrations in the subtropical zooplankton at around 25° N were connected to the subsurface radiocesium and active vertical migration of zooplankton. However, the high activity concentrations of radiocesium in subsurface seawater did not necessarily follow the higher radiocesium activity in zooplankton. Biological characteristics of zooplankton community possibly influenced how large was contamination of radiocesium in the community but it is still unknown what kind of biological factors were important.
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Vân, Lê Thị Hồng, and Trần Ngọc Diễm My. "The Zooplankton composition and surface water quality in some watershed around the aquaculture areas at the Ben Tre province." Science and Technology Development Journal - Natural Sciences 4, no. 1 (April 4, 2020): First. http://dx.doi.org/10.32508/stdjns.v4i1.768.
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The research was conducted in 3 districts: Binh Dai, Ba Tri and Thanh Phu in Ben Tre province in September 2017 (wet season) and April 2018 (dry season). The study recorded 63 taxa of zooplankton belong to 40 genera, 7 classes, and six groups: Protozoans, Rotifers, Cladocerans, Copepods, Ostracods and larvae (of shrimp and crab). Rotifers dominated the local zooplankton quantitatively, with 55,56% of the total organisms. Total zooplankton densities oscillated from 120 – 23 304 ind.m-3 during the wet and dry season. The total zooplankton in the wet season is higher in the dry season. The result of the research showed that zooplanktons were affected by season and salinity. The water quality indices (pH, temperature, salinity, TDS, DO, NO3-, NH4+, PO43-) were under limitation to use for aquaculture activities, aquatic organism conservation, and daily living. The Shannon – Wiener index (H’) fluctuated from 0,51 to 2,02, the Simpson index fluctuated from 0,15 to 0,8, the Pielou index fluctuated from 0,23 to 0,94. The bioindex showed that the water bodies are polluted (from α, β – mesosaprobic level to polysaprobic level). Our results indicated that there was a difference between water environmental parameters and zooplankton communities among seasons and stations. Therefore, it is necessary to combine these two indicators for better accurate results in water quality assessment.
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Chaigneau, Alexis, François Talomonwo Ouinsou, Hervé Hotèkpo Akodogbo, Gauthier Dobigny, Thalasse Tchémangnihodé Avocegan, Fridolin Ubald Dossou-Sognon, Victor Olaègbè Okpeitcha, Metogbe Belfrid Djihouessi, and Frédéric Azémar. "Physicochemical Drivers of Zooplankton Seasonal Variability in a West African Lagoon (Nokoué Lagoon, Benin)." Journal of Marine Science and Engineering 11, no. 3 (March 6, 2023): 556. http://dx.doi.org/10.3390/jmse11030556.
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This study aimed to investigate the seasonal variation of zooplankton diversity and abundance in the Nokoué Lagoon in southern Benin. Through extensive sampling, a total of 109 zooplanktonic taxa were identified and quantified. The average zooplankton abundance was found to be 60 individuals per liter, with copepods and rotifers being the most dominant groups, comprising 68.1% and 29.1% of the total abundance, respectively. The key factor identified as driving the structure of the zooplanktonic assemblages was salinity, which showed significant seasonal variation. The results revealed that during the high water period, when the lagoon was filled with fresh water, rotifers were dominant, zooplanktonic diversity was highest, and abundances were quite high. Conversely, during the low water period, when the lagoon was characterized by brackish water, diversity was minimal, and abundance decreased slightly. The study also found that some areas of the lagoon showed high abundances independent of salinity levels, suggesting that other factors such as riverine inputs or the presence of acadjas (home-made brush parks used as fish traps) may also have notable effects on the zooplankton community. Overall, the findings of this study provide valuable insights into the functioning of one of the most biologically productive lagoons in West Africa.
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Pham, Hong Thi, Khuong Van Dinh, Duc Tien Do, Ha Thi Thu Le, Thu Thi Ninh, and Hoang Thi Thu-Huong. "MACRO-ZOOPLANKTON ABUNDANCE IN RELATION TO METAL ACCUMULATION AND WATER QUALITY IN TRUC BACH LAKE." Vietnam Journal of Science and Technology 58, no. 3A (May 25, 2020): 105. http://dx.doi.org/10.15625/2525-2518/58/3a/14280.
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Urban lake pollution is one of the serious issues due to suffering of waste discharged from householders. However, there is a gap of knowledge about the diversity of zooplankton species and how metals accumulate in zooplankton in urban ecosystems. We addressed this by determining the rule of blooming macro-zooplankton in Truc Bach lake and levels of two essential metals: copper (Cu), and zinc (Zn) and of three non-essential metals: arsenic (As), and lead (Pb) in water samples were determined. The results showed that Cladocerans and copepods are macro-zooplankton dominant species in Truc Bach Lake. Water temperature significantly affects the variety of copepod blooming. Arsenic concentration in water collected from the lake exceeded the safety level of current Vietnamese regulation. As concentration in macro-zooplankton positively correlated with metal concentrations in the water (p < 0.05) while the concentration of Cu, Zn, and Pb in water has no significant correlation with the metal in zooplankton’s body. The relative abundance of adult copepods in Truc Bach lake had a negative correlation with As concentration in water (p = 0.01). The higher As concentration in water, the lower relative abundance of copepods was found in the sample.
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Ekpo, Paul B., Reuben C. Agu, Chinyere Osondu-Anyanwu, Augusta A. Nwachukwu, Nkoyo A. Nkang, and Inyang P. Ekpo. "An Assessment of the Effect of Pollution on Zooplanktons in Calabar Great Kwa River, Nigeria." Journal of Advances in Biology & Biotechnology 26, no. 3 (May 10, 2023): 11–16. http://dx.doi.org/10.9734/jabb/2023/v26i3623.
Full textAbstract:
Aim: Zooplanktons in the Calabar Great Kwa River were studied to assess the effect of pollution from human activities around the river on their respective abundance.
Place and Duration of Study: Samples were collected at the Esuk Atu and Esuk Atimbo stations of the Calabar Great Kwa River. Identification of Zooplanktons was carried out at the Laboratory of the Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
Methodology: Collected samples were preserved, transferred to the laboratory, identified using a dissecting microscope and classified according to their different taxonomical groups.
Results: The Results showed that zooplankton abundance and distribution recorded in the stations were low due to pollution and interference from high human activities around the river such as domestic solid wastes, sewage waste waters, industrial effluents, pesticides, sand mining activities, hydrocarbons and other toxic substances. In Esuk Atu, the total abundance of zooplanktons in the periods of sampling were 12, 6, 3 and 11, while the numbers of taxa represented in the periods of sampling were 4, 3, 1 and 4. In Esuk Atimbo, the total abundance of zooplanktons in the periods of sampling were 7, 5, 9 and 10 while the numbers of taxa represented in the periods of sampling were 3, 3, 3 and 2. The zooplankton taxa identified in station 1(Esuk Atu) are Cladoceran (38%), Ostracoda (22%), Copepoda (19%), Rotifera (12%), Lepidoptera (6%) and Protozoa (3%). The zooplankton taxa identified in station 2 (Esuk Atimbo) are Copepoda (26%), Cladoceran (23%), Nemata (23%), Lepidoptera (16%), Rotifera (6%), Polycheata (3%) and Paguridae (3%).
Conclusion: These findings necessitate the need for the regulation and control of pollution from human activities around the Calabar Great Kwa River so as to ensure that the river is free from harmful contaminants thereby preserving the zooplanktons and other relevant organisms.
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Lalhmingliani, Esther, and Freddy Lalrinpuia. "A preliminary assessment on the plankton diversity of Serlui ‘B’ dam in Mizoram, northeast India." Science Vision 17, no. 4 (December 31, 2017): 238–48. http://dx.doi.org/10.33493/scivis.17.04.08.
Full textAbstract:
Planktonic sampling was carried out at Serlui ‘B’ dam, Mizoram, northeast India from July 2016 to April 2017. The present study reported the occurrence of 6 groups of phytoplankton belonging to 27 genera and 16 orders and 4 groups of zooplanktons belonging to 12 genera 7 orders. The phytoplankton group consisted of Cyanophyceae, Bacillariophyceae, Ulvophyceae, Zygnematophyceae, Chlorophyceae and Xanthophyceae. Cyanophyceae were the predominant component of phytoplankton in Serlui ‘B’ dam during all seasons in terms of numerical abundance and account for 64% of the total phytoplankton. The zooplankton groups consisted of Maxillopoda, Tubulinea, Eurotatoria and Branchiopoda. Of these, the class Maxillopoda was the predominant component of zooplankton in Serlui ‘B’ dam during all season in terms of numerical abundance and account for 73% of the total zooplankton encountered from the study site. This study provides preliminary report of planktons of Serlui ‘B’ dam.
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Dauda, D. M., M. C. Emere, Y. Umar, and A. M. Umar. "Effects of Refining and Petrochemical Effluents on Water Quality and Zooplankton Community in River Rido Kaduna, Nigeria." Bulletin of Environmental Science and Sustainable Management (e-ISSN 2716-5353) 6, no. 1 (July 31, 2022): 19–24. http://dx.doi.org/10.54987/bessm.v6i1.705.
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Kaduna Refining and Petrochemical Corporations (KRPC) discharges were studied for a year along the river Rido to determine their impact on water quality and the distribution and abundance of Zooplankton. Physical and chemical parameters were measured following American Public Health Association (APHA) standards for evaluating wastewater. An atomic absorption spectrometer (AAS) was utilized for heavy metal analysis. For this experiment, we used a Plankton net with a 25 m mesh size and a specimen bottle with a 10 cm diameter ring opening to collect zooplankton. Zooplanktons were identified using a standard key and a monograph. Water quality parameters fluctuated, but all were within acceptable ranges except for temperature, conductivity, Total Dissolved Solid, and lead. Zooplanktons were represented in order of abundance by 8 species of protozoa constituting 72.44%, followed by 12 species of Rotifera (10.58%), followed by 13 species of Cladocera 9.55% and then 6 species of Copepoda (7.44%). The planktons showed seasonal variation with high density recorded during the wet season in all the stations. There was a low density of zooplankton in station B, while high density was observed in stations A and D. Also, the low transparency and dissolved oxygen (DO) as well as high mean values of temperature (30.88 oC), chloride (31.88 mg/L), lead (0.099 mg/L), TDS (224.17 mg/L) and conductivity (334.28 µS/cm) observed were above FEPA limits at station B were an indication of pollution and deterioration of water quality. This research revealed that the effluent discharge from KRPC has adverse effects on the zooplankton community and the water quality of river Rido.
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Chernyshev, Alexander N. "Comparative characteristics of zooplankton in Sisyarvi and hovoye lakes in 2020–2021 (Valaam Archipelago, Ladoga Lake)Lesc." Transactions of the Kоla Science Centre. Series: Natural Sciences and Humanities 3, no. 1/2024 (May 29, 2024): 27–33. http://dx.doi.org/10.37614/2949-1185.2024.3.1.004.
Full textAbstract:
Taxonomic composition, some structural and functional zooplankton characteristics of Lake Sisyarvi and Lake Leschovoye were analysed for the period of 2020–2021. In spite of close location of the lakes and their connection through the channels system differences in dominant species were discovered. In contrast to Lake Sisyarvi great variability in the zooplankton abundance and biomass in Lake Leschovoye was recorded as well as low values of the zooplankter individual mass. Comparative evaluation of the lakes trophic status was given.
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Freyre, LR, DC Colautti, ME Maroñas, ED Sendra, and M. Remes-Lenicov. "Seasonal changes in the somatic indices of the freshwater silverside, Odontesthes bonariensis (Teleostei, Atheriniformes) from a Neotropical shallow lake (Argentina)." Brazilian Journal of Biology 69, no. 2 (May 2009): 389–95. http://dx.doi.org/10.1590/s1519-69842009000200023.
Full textAbstract:
The study object was an Odontesthes bonariensis (Valenciennes, 1835) population of a characteristically shallow lake from the pampasic region. Over one year, zooplankton and fish samples were collected monthly. As a function of time and gender, several indices were investigated (relative weight, mesentery fat index, gonadosomatic index, hepatosomatic index and somatic index) and were related to zooplanktonic community dynamics, the main energy food source for this species. The results indicate that the seasonal information contained in the weight compartments is most important in mesentery fat, gonads and liver. The zooplankton availability modulates reserves (fat) behaviour and physiologic activity (liver), determining spawn intensity. Thus, in spring spawns, with higher zooplankton availability, mature individuals of the population, males and females, transfer energy from the food to the gonads. In autumn spawns, they use the fat reserves for gonad ripening.
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Muñoz-Pedreros, Andrés, Patricio De los Ríos, and Marilyn González-Urrutia. "Zooplankton of a mountain river and highland bogs in a wetlands complex in Atacama, an Altiplano desert, in northern Chile." Crustaceana 92, no. 4 (April 1, 2019): 429–44. http://dx.doi.org/10.1163/15685403-00003882.
Full textAbstract:
Abstract The Atacama is the world’s driest desert. It contains various types of wetlands. In general, the diversity and structure of the zooplankton in these wetlands have been very little studied. The object of the present study was to analyse the specific composition and structure of the zooplankton in a transect which included highland bogs and an endorheic mountain river in the Altiplano of northern Chile. In 2017, samples of zooplankton were collected for qualitative and quantitative analysis in two types of wetlands. Eight taxa of zooplanktonic crustaceans were recorded. The results of null models revealed the absence of regulator patterns for all sites in species co-occurrence. Cluster analysis generated two groups with low similarity between them. The results observed in the correlation matrix showed significant direct associations between some species and the level of dissolved oxygen, conductivity and salinity.
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Imanit, E. N., A. P. Novosyolov, A. G. Zavisha, and A. L. Levitskiy. "ANNUAL CHANGES IN SPECIFIC COMPOSITION AND QUANTITATIVE INDICATORS OF ZOOPLANKON IN LAKE GOLODNAYA GUBA LOWER REACHES OF PECHORA RIVER." EurasianUnionScientists 1, no. 11(56) (2018): 17–21. http://dx.doi.org/10.31618/esu.2413-9335.2018.1.56.17-21.
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The article presents the species composition and the quantitative indicators of zooplanktons of the lakeover a 30-year research period. It was found that the zooplankton's community is represented by taxa typical for North-ern reservoirs, including 65 species belonging to 37 genera, 19 families, 5 groups and 3 classes: Rotifera –17, Cladocera –27 and Copepoda –21. According to the dominant number of species, the summer zooplankton com-munity of the lake is characterized as a cladoceran's community. A characteristic feature the structure of the zoo-plankton’s community is the presence of several dominant species, from 10 to 71,6 % of the total population. The given information can be useful in solving issues related to the biological diversity lake's ecosystems in the region, as well as the development of rational use ways fisheries inland's waters of the Nenets Autonomous Okrug.
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Witariningsih, Putu Maya, Yulianto Suteja, and I. Nyoman Giri Putra. "Komposisi Jenis Dan Fluktuasi Kelimpahan Plankton Secara Temporal Di Perairan Selat Lombok." Journal of Marine and Aquatic Sciences 6, no. 1 (September 25, 2020): 140. http://dx.doi.org/10.24843/jmas.2020.v06.i01.p17.
Full textAbstract:
Indonesian Throughflow (ITF) is a circulation of water mass in Indonesian, water are carrying from the Pacific Ocean to the Indian Ocean. When the water mass from the Pacific Ocean to Indonesian waters will mix with the water mass of Indian Ocean. One of the outflow is the Lombok Strait. The mixing of process bring nutrient-rich in bottom layer to rise to the upper layer and it will affect the fertility. One indicator of water fertility by measuring the abundance and distribution of plankton. The aims of this study to determine the temporal of composition species and fluctuations of plankton abundance temporally in the waters of the Lombok Strait. The study was conducted in the Lombok Strait in November 2017. Data was collected at one point and sample was only take on the surface of the waters. The genus composition of the most widely found phytoplankton Bacillariophyceae class (19 genera) and from the widely obtained zooplankton Hexanauplia class (7 genera). The highest abundance of phytoplankton occurs during high tide during afternoon. This phenomenon is caused by photosynthesis of phytoplankton in the water surface. In contrast to the abundance of the highest zooplankton occurs during high tide in the early morning. This is caused by zooplankton's daily vertical migration and negative phototaxis. Comparison of phytoplankton abundance with zooplankton abundance is inversely proportional, zooplankton abundance depends on abundance of phytoplankton, because phytoplankton grow faster by cell substraction, compared to phototaxis of in zooplankton. It is also a predation of phytoplankton by zooplankton.
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Isyaku, I. H., and S. Ibrahim. "Spatio-temporal distribution of zooplankton and physico-chemical conditions of Wasai Reservior, Kano State, Nigeria." Bayero Journal of Pure and Applied Sciences 12, no. 1 (April 15, 2020): 186–92. http://dx.doi.org/10.4314/bajopas.v12i1.30s.
Full textAbstract:
A study of spatio-temporal distribution of zooplanktonic community in relation to physico-chemical water condition of Wasai Reservoir was carried out between March and October, 2018. Three sampling sites selected for the purpose of this study were based on different human activities taking place in the areas like fishing, sand collection, washing etc. Nine physico-chemical and biological parameters were determined on fortnight basis 8:00 to 10:00am using standard methods. The result revealed that temperature, pH, Electrical conductivity, Total dissolved solids, Dissolved oxygen, Biochemical oxygen demand, transparency, nitrate and phosphate ranged from 24.4 to 29.1°C, 6.4 to 8.4, 353.3 to 846.6µS/cm, 264.3 to 602.8mg/L, 6.7 to 10.9mg/L, 2.8 to6.8mg/L, 5.6 to 12.3cm, 0.12 to 0.55mg/L and 0.08 to 0.22mg/L respectively. A total of thirteen (13) species of zooplankton were identified from the reservoir out of which three (3) belong to the class copepoda with a highest mean value of 37.67 recorded in May and lowest, 8.88 in October. Five species belong to the class Rotifera with a highest mean of 2.93 recorded in March and lowest in June (0.80). Similarly five species belong to the class Cladocera, with highest mean of 3.40 in April and lowest (0.27) in June and October respectively. The result showed seasonal variation in zooplankton species, as thier distribution increased in the dry season than in wet season, primarily due to the increase in photic depth of the water. Pearson correlation coefficient was used to determine the relationship between zooplankton and physico-chemical parameters. The correlation coefficient of physico-chemical parameters and zooplankton of the reservoir revealed strong positive correlation between zooplankton, EC, TDS, pH, Temperature and transparency at (P<0.05)while negative correlation exist between zooplankton, BOD5, DO, Nitrate and Phosphate at (P<0.05).
Keywords: Distribution, Diversity, Reservoir, Wasai, Zooplankton.
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Almeida, VLS, ÊW Dantas, M. Melo-Júnior, MC Bittencourt-Oliveira, and AN Moura. "Zooplanktonic community of six reservoirs in northeast Brazil." Brazilian Journal of Biology 69, no. 1 (February 2009): 57–65. http://dx.doi.org/10.1590/s1519-69842009000100007.
Full textAbstract:
The aim of the present study was to investigate the zooplankton community at six reservoirs in the state of Pernambuco (Brazil). Zooplankton assemblages were identified using current literature and quantitatively analysed under a microscope and stereomicroscope. Concurrently to the sampling of zooplanktonic and phytoplanktonic communities, in situ measurements of abiotic variables, such as water temperature, dissolved oxygen and pH, were determined using field probes and transparency was determined with a Secchi disk. Total phosphorus concentrations were used for the determination of the Trophic State Index. The reservoirs were classified between eutrophic and hypertrophic, oxygenated, with pH varying from slightly acid to alkaline, high temperatures and low water transparency. A total of 27 zooplankton taxa were identified. Phytoplankton was represented by Cyanophyta, Chlorophyta, Baccilariophyta and phytoflagellates. The highest richness of species was observed for Rotifera (17), followed by Crustacea (8), Protozoa (1) and Insecta (1). Rotifers shared quantitative importance with Crustacea, which were mainly represented by juvenile forms. Jazigo Reservoir presented the highest diversity and equitability. Lowest diversity and equitability were recorded at the Poço da Cruz and Mundaú reservoirs, respectively. Dissimilarity was detected between the environments studied regarding zooplankton composition and structure.
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Dwinovantyo, Angga, Henry M. Manik, Tri Prartono, Susilohadi Susilohadi, and Tohru Mukai. "Variation of Zooplankton Mean Volume Backscattering Strength from Moored and Mobile ADCP Instruments for Diel Vertical Migration Observation." Applied Sciences 9, no. 9 (May 6, 2019): 1851. http://dx.doi.org/10.3390/app9091851.
Full textAbstract:
Zooplankton can be detected by using acoustic Doppler current profiler (ADCP) instruments through acquiring the mean volume backscattering strength (MVBS) data. However, the precision of the backscattered signal measured by single ADCP measurement has a limitation in the MVBS variation of zooplankton. The objectives of this study were to analyze the MVBS and vertical velocity from ADCPs at the same time and location for zooplankton’s daily vertical migration (DVM) observation. Measurements were conducted in Lembeh Strait, North Sulawesi, Indonesia. Instruments used included a moored ADCP 750 kHz and a mobile ADCP 307.2 kHz. High MVBS value was found at 11.5–16 m depths and was identified as the sound scattering layer (SSL). The DVM patterns in the SSL displayed significant differences over time and had good relationships with the diurnal cycle. Theoretical target strength (TS) from the scattering models based on a distorted-wave Born approximation (DWBA) was estimated for Oithona sp. and Paracalanus sp.; the two dominant species found in the observed area. However, ΔMVBS and ΔTS proved that the dominant zooplankton species were not the main scatterers. The strong signal in SSL was instead caused by the schools of various zooplankton species.
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KEHAYIAS, G., A. RAMFOS, S. IOANNOU, P. BISOUKI, E. KYRTZOGLOU, A. GIANNI, and I. ZACHARIAS. "Zooplankton diversity and distribution in a deep and anoxic Mediterranean coastal lake." Mediterranean Marine Science 14, no. 1 (March 22, 2013): 179. http://dx.doi.org/10.12681/mms.332.
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The variation of the smaller size fraction of zooplankton was investigated during a two-year period in a brackish deep and anoxic coastal lake of western Greece (Aitoliko), along with the specific environmental characteristics of this ecosystem. The zooplanktonic community comprised a relatively small number of taxa and it was dominated by brackish-water calanoid copepods (Paracartia latisetosa, Calanipeda aquaedulcis) and in certain periods by rotifers and tintinnids. The zooplankton abundance showed an increase in the warmer period starting from late spring and reached maximum values in July. In the well oxygenated surface layer, temperature was the most important parameter influencing the seasonal cycles of all groups. In contrast, the oxygen depletion a few meters under the surface affected the vertical distribution of most of the zooplankton groups, which were found restricted in the surface layer especially from spring until autumn. Only the meroplanktonic larvae of polychaetes presented increased proportions in the deeper layers. Salinity has not significantly influenced the zooplanktonic assemblages. The results point out the degraded status of the Aitoliko basin where the hypoxic/anoxic layers resulted to a high portion of dead organic material identified as copepod carcasses, and underlines the necessity of monitoring of this ecosystem.
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Dhaswadikar Usha Sitaram. "Zooplankton composition and abundance from Nideban Reservoir, Udgir Dist. Latur." World Journal of Advanced Research and Reviews 12, no. 3 (December 30, 2021): 151–54. http://dx.doi.org/10.30574/wjarr.2021.12.3.0640.
Full textAbstract:
Zooplanktons are the microscope free swimming organisms of aquatic system. There are represented by a wide array of taxonomic groups of which the members belonging to protozoa, Rotifera, Cladocera and Copepoda are most common and often dominate the entire communities. They have many remarkable features which hamper their predation by higher organisms. The members of Zooplankton community are important for their role in trophic dynamics, energy transfer in the aquatic ecosystem. They provide food for fishes in the water bodies and play a major role in the fish production. The zooplankton community was studied by monthly samples taken from Oct. 2018 to Feb. 2019. The reservoir water is used for agriculture and fishery activities.
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Kar, Sulata, Papia Das, Uma Das, Maibam Bimola, Devashish Kar, and Gautam Aditya. "Correspondence of zooplankton assemblage and water quality in wetlands of Cachar, Assam, India: Implications for environmental management." Limnological Review 18, no. 1 (March 1, 2018): 9–19. http://dx.doi.org/10.2478/limre-2018-0002.
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AbstractThe zooplankton assemblage of selected wetlands of Assam, India was assessed to deduce the structural variation in the context of water quality parameters. A two year study between 2012 and 2014 comprising of 530 samples from the five wetlands revealed the presence of 46 taxa, 26 Rotifera, 15 Cladocera, 4 Copepoda and 1 Ostracoda, in varying density. The rotifers dominated in terms of abundance (48 ind. cm−3) followed by the cladocerans (28 ind. cm−3) and the copepods (19 ind. cm−3) and showed significant (p <0.05) correlations with turbidity, alkalinity, hardness and phosphate contents of the water samples. The diversity and the richness of the zooplankton showed an increasing trend with the water temperature. Among the different taxa, Brachionus sp. was most abundant followed by Mesocyclops sp. while Beauchampiella sp. was represented in the least numbers. Application of the cluster analysis allowed the segregation of the different zooplankton based on the similarities of abundance in the samples. The water quality parameters like temperature, alkalinity, turbidity, magnesium and calcium were observed to be significant contributors in shaping the zooplankton community composition of the wetlands, revealed through the correlations and canonical correspondence analysis. As an extension, the information can be used in monitoring the quality of the freshwater habitats of the concerned and similar geographical regions, using the zooplankton as the major constituents. The variations in the abundance of cladoceran, copepod and rotifer zooplanktons can be used to understand the mechanisms that sustain the food webs of the aquatic community of the freshwater bodies.
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De los Ríos-Escalante, Patricio. "Fish predation effects on body length of planktonic cladocerans and copepods in Chilean lakes." Crustaceana 88, no. 10-11 (2015): 1193–99. http://dx.doi.org/10.1163/15685403-00003472.
Full textAbstract:
The zooplankton assemblages in Chilean lakes are characterized by their markedly low species numbers and dominance of calanoid copepods. Nevertheless, the effects of zooplanktivorous fish predation on zooplankton size in these communities have not yet been studied in detail. The aim of the present study was to analyse the total length in the main groups of zooplanktonic crustaceans in Chilean lakes: Copepoda: Calanoida, and Cladocera: Daphniidae, as well as “small cladocerans” (specifically the families Bosminidae and Chydoridae). The results revealed that in the presence of fish, total body length decreased significantly for calanoid copepods, whereas for other groups that presence has no significant effect. In sites with fishes, daphniids are significantly larger in comparison with the other groups of the zooplankton community, whereas in sites without fishes calanoids are significant larger in comparison with those other groups. These results would indicate that calanoids would be the main prey for zooplanktivorous fishes in Chilean lakes. Similar results have been reported for Argentinean Patagonian lakes.
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Norambuena, Juan-Alejandro, Patricia Poblete-Grant, Jorge F. Beltrán, Patricio De Los Ríos-Escalante, and Jorge G. Farías. "Evidence of the Anthropic Impact on a Crustacean Zooplankton Community in Two North Patagonian Lakes." Sustainability 14, no. 10 (May 17, 2022): 6052. http://dx.doi.org/10.3390/su14106052.
Full textAbstract:
Lately, agriculture, livestock, forestry, and aquaculture activities have been greatly developed in Chilean North Patagonia, negatively impacting the balance of the environmental conditions in lakes and affecting the development and survival of several native species. The aim of this study was to assess the anthropic impact on a zooplankton community in two North Patagonian lakes. We collected samples from four sites belonging to Lake Icalma and Lake Llanquihue, including four replicates per site. Water samples were analyzed for physicochemical characteristics and zooplankton communities. We focused on the presence of Daphnia pulex, a species of zooplanktonic crustacean that performs a key role in capturing energy from primary producers to deliver it to final consumers such as fish. We found that Llanquihue showed higher total phosphorus, nitrogen, copper, iron, manganese, total dissolved solids (TDS), and conductivity (EC) than Icalma. Furthermore, ecological variables were greatly decreased due to total P, total N, manganese, copper, total dissolved solids, and conductivity, which changed the species dominance of the zooplankton community in Llanquihue, indicating some degree of anthropization. This study provides fundamental information on the anthropogenic impact on water quality, as well as on zooplankton diversity, highlighting the importance of monitoring the health of these North Patagonia freshwater ecosystems.
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Florescu, Larisa I., Mirela M. Moldoveanu, Rodica D. Catană, Ioan Păceșilă, Alina Dumitrache, Athanasios A. Gavrilidis, and Cristian I. Iojă. "Assessing the Effects of Phytoplankton Structure on Zooplankton Communities in Different Types of Urban Lakes." Diversity 14, no. 3 (March 21, 2022): 231. http://dx.doi.org/10.3390/d14030231.
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Urban lakes play important roles in microclimate regulation such as controlling run-off and groundwater recharge, as well as being a source of water supply and a habitat for a wide variety of flora and fauna. Bucharest has a wide variety of water resources where phytoplankton represent the dominant primary producer, the defining biological factor for zooplankton development. Our hypothesis was that as a result of anthropogenic pressures, phytoplankton in the urban aquatic ecosystems diminish the qualitative and quantitative capacity to maintain a good health condition with effects on the food web. By the structural features of the phytoplankton and zooplankton communities, the objectives were to determine the changes in diversity in different types of urban lakes, to explore the relationships between communities, and to determine the response of phytoplankton and zooplankton functional groups to the environmental factors. The ecological status assessed by Chlorophyll-a (µL−1) highlights that most of the investigated lakes were eutrophic and hypereutrophic. The phytoplankton were influenced by lake types, seasonal variations and nutrient input. The dominance of the Chlorophyceae, Cyanobacteria and Bacillariophyceae influenced the zooplankton’s development. The rotifers were the most represented in both species richness and abundance in zooplankton, followed by Copepoda young stages.
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Dutta, S. P. S. "Monthly variations in physico-chemical characteristics of water, MPN index and zooplankton of Devak stream, at Shiv temple complex, Udhampur, Jammu ( J & K), India." Journal of Applied and Natural Science 6, no. 2 (December 1, 2014): 816–24. http://dx.doi.org/10.31018/jans.v6i2.542.
Full textAbstract:
Water quality characteristics, MPN index/100ml, and zooplankton of sacred Devak stream, Udhampur were analyzed during February, 2010 to January, 2011. Various water quality parameters showed a well marked seasonal variation including MPN index/100 ml which remained above 240 during all the observations. Zooplanktons comprising of 46 species showed qualitative dominance of protozoa (33 species) followed by rotifera (7 species), annelida (2 species) and insecta (1 species), water nematoda, turbellaria (1 species) and cysts. Zooplankton was qualitatively and quantitatively poor/absent during monsoon floods (June to September) and was diversified and rich during February to May. Comparison of water utility parameters and MPN count/100 ml with national and international agencies suggested that water of this stream was not fit for consumption.
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Ramfos, Alexis, Stylianos Somarakis, Constantin Koutsikopoulos, and Nina Fragopoulu. "Summer mesozooplankton distribution in coastal waters of central Greece (eastern Mediterranean). I. Hydrology and group composition." Journal of the Marine Biological Association of the United Kingdom 85, no. 4 (June 27, 2005): 755–64. http://dx.doi.org/10.1017/s0025315405011665.
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Zooplankton and hydrography of the upper 200 m was studied in coastal and pelagic waters off central Greece (eastern Mediterranean) during July 1998. The spatial distribution of the main environmental (temperature, salinity, fluorescence) and zooplankton (abundance, dry-weight, dominant groups) features of the area was delimited over an intense grid of 124 stations. The complex topography of the surveyed area comprised an interesting field for the study of pelagic–coastal interaction and its influence on the taxonomic composition of zooplankton.A typical summer thermal stratification was observed over the entire study area. Marked differences were found in surface-salinity between the eastern (Aegean Sea) and the western (Ionian Sea) part of the study area, which was attributed to the presence of less saline waters originating from the Black Sea. A deep fluorescence maximum was present in both coastal and pelagic stations. Zooplankton abundance and biomass showed an inshore–offshore gradient with coastal areas being significantly richer than pelagic areas. The taxonomic composition of zooplankton varied greatly both along the inshore–offshore gradient and among the different semi-enclosed Gulfs. Copepods were the dominant group in the pelagic waters comprising 67–78% in terms of mean relative abundance. In coastal areas, copepods were less important with cladocerans (especially the species Penilia avirostris) being the dominant group (44–51%). Appendicularians and chaetognaths comprised an important component of the zooplankton community over the entire surveyed area with mean relative abundance ranging from 2·5 to 14% and 0·6 to 5·8%, respectively.
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Vaidya, Sunil Ram, and Umakant Roy Yadav. "Ecological Study on Zooplankton of Some Fresh Water Bodies of Kathmandu Valley With Reference to Water Quality." Journal of Natural History Museum 23 (June 4, 2009): 1–11. http://dx.doi.org/10.3126/jnhm.v23i0.1833.
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The present investigation was carried out in Bagmati river (Lotic water body), Taudah lake, Nag pokhari pond, Siddha pokhari pond and Godavari fish pond (Lentic water bodies) of the Kathmandu valley from May 2000 to April 2002. A monthly samples of water and zooplanktons were collected from those sites and analyzed for the entire twenty four months period. Only three groups of zooplankton viz: Rotifera, Cladocera and Copepoda were collected from the lotic and lentic water bodies. It was observed that Rotifers were found to be more diversified than Cladocerans and Copepods in all water bodies except in Nagpokhari. A total of seventy one species of zooplankton were recorded during that period. The lentic water bodies supported a higher species richness constituting seventy species whereas the lotic water bodies constituted only seven species of zooplankton. All investigated zooplanktons Rotifera, Cladodera and Copepoda were found contagiously distributed in all lentic water bodies. In the Bagmati river, Rotifers were recorded only in the upstream zone. Cladocerans predominated (74 %) in the upstream, Copepods predominated (70 %) in the mid-stream and again Cladocerans predominated (60 %) in the down-stream of the river. Among the investigated water bodies, the species richness was found higher in Godavari fish pond (36 species) than Taudah lake (35 species), Siddha pokhari (34 species) and Nag pokhari (26 species).The water quality of the investigated waterbodies were found to be deteriorated due to discharge of untreated effluents,solid wastes and poor conservation practices.Journal of Natural History Museum Vol. 23, 2008 Page 1-11
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Loussahi, F.-Z., S. Ait-Benichou, A. El-Hissoufi, and A. Fahde. "INVENTORY OF ZOOPLANKTON AND MACROINVERTEBRATES IN THE DAYA OF DAR BOUAZZA, CASABLANCA, MOROCCO." International Journal of Advanced Research 11, no. 09 (September 30, 2023): 565–76. http://dx.doi.org/10.21474/ijar01/17563.
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This study aims to contribute to the elaboration of an inventory of zooplankton and macro invertebrates in the daya of Dar Bouazza, Casablanca region, Morocco. The determination of macro invertebrates and zooplanktons was based on the study of benthic larvae sampled between March and June 2021 in 4 stations. In the 4 stations, the benthic macro invertebrates recorded are distributed over 4 major faunal groups, 27 families and 35 genera. Coleoptera are largely dominant with 7 families. Diptera are second with 5 families. The Hemiptera are in third place. The zooplanktonic fauna of the Daya is divided into 2 groups: Cladocerans which are represented by three genera (Bosmina, Daphnia and Diaphanosoma) and Copepods which are represented only by the genus Cyclops.The physicochemical results showed a strong mineralization in the Daya. This is probably the combined effect of the degradation of the waters of the Daya of Dar Bouazza and the water table of the coastal chaouia, of which Daya is part. These results are confirmed by bacteriological tests through the identification and enumeration of Coliforms and intestinal Streptococci. The presence of these bacteria translates a pollution of fecal origin making these waters unfit for human use.
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Negreiros, NF, NE Rojas, O. Rocha, and MJ Santos Wisniewski. "Composition, diversity and short-term temporal fluctuations of zooplankton communities in fish culture ponds (Pindamonhangaba), SP." Brazilian Journal of Biology 69, no. 3 (August 2009): 785–94. http://dx.doi.org/10.1590/s1519-69842009000400005.
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The present study aimed at evaluating the composition, diversity and short-term temporal fluctuations of zooplankton communities in fish ponds. The study was carried out in two fish ponds, with 180 m² of water surface (6 × 30 m) each, located in the Aquiculture Centre of the Pindamonhangaba Fisheries Institute - São Paulo. The study was developed over eight weeks, from February 16 to April 6, 1998. The physical and chemical conditions of the water in the fish ponds were adequate for zooplankton development. The zooplanktonic community was characterised by high richness of species and a greater diversity was observed in the first fish pond, with a superior density of Rotifera. Temporal changes in zooplankton composition occurred in both ponds with Cladocera appearing in abundance later, in the fourth week, whereas copepods and rotifers were well represented since the beginning. Many species found are typical of fish ponds and are considered to constitute an excellent food source, showing high nutritional value for fish larvae, a good example being individuals from the Rotifera group and the micro-crustacean species Moina minuta and Thermocyclops decipiens.
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Stamou, Georgia, Matina Katsiapi, Maria Demertzioglou, Dimitra Voutsa, Argyri Kozari, Ioanna Pantelaki, Maria Moustaka-Gouni, and Evangelia Michaloudi. "Pelagial Zooplankton Community in a Newly Established Reservoir during and after the Impoundment of a Hydropower Dam." Diversity 15, no. 2 (February 12, 2023): 257. http://dx.doi.org/10.3390/d15020257.
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The global increase in energy demand has triggered a global boom in the construction of hydropower dams worldwide affecting biological communities. Our objective is to study the zooplankton (Rotifera, Cladocera and Copepoda) community structure during and after the impoundment of a newly constructed reservoir, to provide valuable knowledge on species diversity, community structure and dynamics to be considered in future management plans. The impoundment period was characterized by increased species richness with high turnover because of the zooplankton’s high dispersal ability and reflected the inoculation of the reservoir with local fauna. Zooplankton during this period were also correlated negatively with depth and positively with total organic nitrogen and nitrate, highlighting the importance of trophic impact. The time following the impoundment reflected the colonization processes to more stable communities. The seasonality domination followed the Mediterranean pattern, with cold and warm periods being differentiated by changes in community structure, while abundance and biomass remained low throughout the studied period. Combined with the dominance of small-sized individuals, it resulted in low grazing pressure, indicating that zooplankton was not the factor controlling phytoplankton.
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Lan, Bo, Liping He, Yujing Huang, Xianhua Guo, Wenfeng Xu, and Chi Zhu. "Tempo-spatial variations of zooplankton communities in relation to environmental factors and the ecological implications: A case study in the hinterland of the Three Gorges Reservoir area, China." PLOS ONE 16, no. 8 (August 18, 2021): e0256313. http://dx.doi.org/10.1371/journal.pone.0256313.
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To expand the knowledge on the tempo-spatial patterns of zooplankton and the key modulated factors in urban aquatic ecosystem, we investigated zooplankton and water quality from April 2018 to January 2019 in the hinterland of the Three Gorges Reservoir area, Wanzhou City of China. The results indicated that water quality indicated by the trophic state index (TSI) reached a state of mesotrophication to light eutrophication in the Yangtze River, and a state of moderate- to hyper- eutrophication in its tributaries. Based on the biomass of zooplanktons, Asplanchna priodonta was the most common specie in April; Encentrum sp., Filinia cornuta and Epiphanes senta were the most noticeable species in summer; Cyclopoida Copepodid, Sinocalanus dorrii and Philodina erythrophthalma became the dominant species in winter. Generally, rotifers prevailed in April and August, and copepods became the most popular in January. According to canonical correspondence analysis, nitrate, temperature (T), ammonia, water level and permanganate index (CODMn) significantly influenced the community structure of zooplankton (p < 0.05). The dominant species shifts of zooplankton were partly associated with nutrient level (nitrate and ammonia) under periodic water level fluctuations. Rotifers and protozoans were characterized as high T adapted and CODMn-tolerant species comparing with cladocerans and copepods. The ratio of microzooplankton to mesozooplankton (Pmicro/meso) has presented a strongly positive relationship with T (p < 0.001), as well as Pmicro/meso and CODMn (p < 0.001). It implied that zooplankton tended to miniaturize individual size via species shift under high T and/or CODMn conditions induced by global warming and human activities. The information hints us that climate change and human activities are likely to produce fundamental changes in urban aquatic ecosystem by reorganizing biomass structure of the food web in future.
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Gabriel Bertrand Zambo, Rachelle Biloa Essomba, Rodrigue Dongmo Nanfack, François Desire Edoa Owona, Eric Kueppo Kouedeum, Paul Bertrand Nangou Sob, Piscart Christophe, and Serge Hubert Togouet Zébazé. "Spatiotemporal distribution of zooplankton in relation to some abiotic variables in the waters of the Kribian Atlantic coast (South Cameroon)." World Journal of Advanced Research and Reviews 17, no. 1 (January 30, 2023): 1256–70. http://dx.doi.org/10.30574/wjarr.2023.17.1.1231.
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A research to study the zooplanktonic population in relation to some abiotic variables of the Kribian coast waters was conducted from July to December 2020 following a monthly sampling in six (6) selected sites. The physicochemical parameters were determining out using standard methods. Concerning the zooplankton, the water was collected at the surface, in the trophogenic and tropholytic layers, then filtered through a 64 µm plankton sieve and the retentate was fixed with 96% alcohol. Identification and counting were done in the laboratory using a Wild M5 binocular loupe, appropriate keys and works. The physicochemical results showed a very good oxygenation of the waters (91.85 ± 3.87%), basic pH (8.43 ± 0.54 U.C), a low salinity and conductivity of respectively 13.04 ± 3.92 g/L and 23.07±4.23 µS/cm characteristic of the haline domains and a temperature of 28.66 ± 1.35°C. With regard to nutrients, the values recorded showed a progressive enrichment of the water in nitrate (2.2±1.81mg/L) and a low concentration in orthophosphate (0.25±0.41mg/L). the zooplankton community haboured, 54 taxa belonging to 3 major groups (Copepoda, Cladocera, Ciliate) and other Zooplankton, 24 families and 29 genera were recorded. The Copepod group dominated the taxonomic richness with 34 taxa (62.96% of total richness), followed by Tintinidae with 4 taxa (7.4%), Cladocera with 1 marine taxa (1.9%) and 15 taxa for other zooplankton (27.8%). Quantitatively, Copepods were once again the most abundant group in the population, with an average of 78.3% of the total zooplankton abundance. The dominant copepod taxa in terms of abundance were those of the families of: Paracalanidae (mean abundance: 116 ind/L) and Oithonidae (mean abundance: 99ind/L).
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Chishty, Nadim, Anil Tripathi, and Madhusudan Sharma. "Evaluation of acute toxicity of zinc, lead and cadmium to zooplanktonic community in upper Berach river system, Rajasthan, India." South Asian Journal of Experimental Biology 2, no. 1 (March 19, 2012): 20–26. http://dx.doi.org/10.38150/sajeb.2(1).p20-26.
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Current study investigated through static bioassay, the acute toxicity of Zinc,Lead and Cadmium to fresh water zooplankters in the upper Berach riversystem which is a part of Gangetic river system. The river basin stretchesfrom Madar tank to Sarjana tank with a total length of 46 Km, including ninewater bodies i.e. Bada madar tank (73‹36Âf0ÂfÂfE and 24‹38Âf0ÂhN ), Chhotamadar tank, Fateh sagar lake, Udaisagar lake, UpÂ]stream pond (BichhdiÂ]I),DownÂ]stream pond(BichhdiÂ]II), Gadwa, Daroli and Sarjana tank (73‹ 57Âf10ÂhEand 24‹14Âf30Âh N). Whole zooplanktonic communities were exposed to different heavy metal stresses. Exposed zooplanktonic community included nine planktonic forms i.e. Heliodiaptomus viduus, Mesocyclops hyalinus, Heterocypris, Daphnia lumholtzi, Moina, Brachionus, Monostyla, Filinia. Cadmium was found to be most toxic and Zinc was least toxic to zooplankton. Ostracods and Cyclops were resistant forms and rotifers were sensitive forms in relation to metallic exposure. Sensitivity pattern observed during laboratory experiments was found to be in accordance with biodiversity variation of zooplankton in different ponds of Berach river system.
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Kamarainen, Amy M., Freya E. Rowland, Reinette Biggs, and Stephen R. Carpenter. "Zooplankton and the total phosphorus – chlorophyll a relationship: hierarchical Bayesian analysis of measurement error." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 12 (December 2008): 2644–55. http://dx.doi.org/10.1139/f08-161.
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Zooplankton grazing is important in resolving residual variation around the total phosphorus – chlorophyll a relationship. In empirical studies, zooplankton body size is often a better predictor of residual variation than zooplankton biomass. We investigate whether higher measurement error associated with zooplankton biomass may explain its lower predictive ability. We collected five replicate zooplankton biomass samples in 19 lakes, allowing us to quantify measurement error in volumetric zooplankton biomass with greater precision than in previous studies. A hierarchical Bayesian model was used to assess the predictive ability of volumetric zooplankton biomass and mean individual zooplankton length, corrected for measurement error. We found consistent effects of total zooplankton biomass, but not zooplankton length, on chlorophyll a. This finding does not appear to be related to the higher precision with which total zooplankton biomass was measured in our study, but rather to ecological factors. Interlake variation outweighed the effects of measurement error in estimating the strength of relationships between zooplankton variables and chlorophyll a. Our findings therefore suggest that studies to estimate zooplankton effects on phytoplankton should allocate resources to study a larger range of lakes over different time periods than to process replicate samples to reduce measurement error.
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Zhirkov, Innokenti Innokentyevich, Matvei Matveevich Tyaptirgyanov, Tamara Petrovna Trofimova, Irina Grigoryevna Sobakina, and Konstantin Innokentyevich Zhirkov. "Assessment of seismic vibratory impact on experimental lakes ecosystems." Samara Journal of Science 7, no. 2 (June 15, 2018): 36–40. http://dx.doi.org/10.17816/snv201872106.
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The paper deals with the assessment of seismic vibratory impact on experimental lakes ecosystems. Changes of chemical and zooplanktonic composition of experimental lakes before vibration works were studied. Crucian carps were used for the assessment of vibratory impact. Hydrochemical researches included definition of organoleptic indicators, dissolved gases, biogenous elements, organic substance and the main ions, polluting substances and metals. The chemical analysis is carried out by standard hydrochemistry techniques. 18 samples on quantitative and qualitative structure of a zooplankton were collected and processed. Zooplankton organisms definition was carried out by means of widely used determinants. For icthyological researches fish caught in Nidzhili Lake was used. The bioanalysis was carried out by standard ichthyology techniques. The conducted pilot studies have shown that such quantitative and qualitative water condition changes and such vibratory impact on zooplanktonic organisms and crucians condition which we consider reaching catastrophic influences. If to take into account intensity and efficiency of fish, zooplanktonic and bentosny organisms restoration in the studied lakes, it is possible to consider that there are no cardinal changes in hydrobionts and fish fauna as a result of vibratory impact. It is also possible to assume that the essential part of such changes remains out of attention and opportunities of modern monitoring.
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Morgan, N. C. "Tropical zooplankton." Biological Conservation 32, no. 4 (1985): 386. http://dx.doi.org/10.1016/0006-3207(85)90027-8.
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Bremigan, Mary T., and Roy A. Stein. "Gape-dependent Larval Foraging and Zooplankton Size: Implications for Fish Recruitment across Systems." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 4 (April 1, 1994): 913–22. http://dx.doi.org/10.1139/f94-090.
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Small gape of zooplanktivorous larval fish limits their prey size; yet, within constraints set by gape, zooplankton size eaten influences larval growth and ultimately survival. To determine if optimal zooplankton size varied among fish species with different gapes, we conducted foraging trials with larval bluegill (Lepomis macrochirus, 10–26 mm TL) and gizzard shad (Dorosoma cepedianum, 18–31 mm TL). Larvae (n = 10) fed for 1 h on zooplankton assemblages that varied in size, after which all larvae and remaining zooplankton were preserved. Larval gape was measured; both larval gut contents and available zooplankton were quantified. Bluegill, the large-gaped species, fed on larger zooplankton than did gizzard shad with similar gapes. Further, larger bluegill fed on progressively larger zooplankton whereas all gizzard shad ate small prey (< 0.60 mm). As available zooplankton size increased, bluegill prey size increased whereas gizzard shad consistently selected small prey. Therefore, differences in zooplankton size among lakes could differentially affect foraging success of larval fishes. In particular, systems with small zooplankton may represent ideal foraging environments for gizzard shad whereas lakes with large zooplankton may favor larval bluegill. If differential larval foraging translates to differential growth and survival, zooplankton size could influence recruitment success and ultimately fish community composition.