Zooplankton diversity of a Freshwater wetland of Assam
Journal Title: International Journal of Advanced Biotechnology and Research. - Year 2016, Vol 7, Issue 2
Abstract
ABSTRACT: Zooplankton are passively drifting microscopic organism in an aquatic waterbody which occupy a central position between the autotrophs and heterotrophs in an aquatic ecosystem. They are good bio-indicator of environmental pollution as they response quickly to any changes in water quality. Zooplankton are also known as staple food item of fishes especially the larvae of fishes. For success in an aquaculture activity they are known to play very important role indicating the presence or absence of certain species of fishes or the determining the population densities of an aquatic farm. The present work was undertaken in Madhura anua, an oxbow lake in Cachar, Assam which is mainly used by people residing in the catchment area for aquacultural program and also household activities. The study was carried out for a period of one year (September 2014 to August 2015) to study the diversity of zooplankton in the freshwater ecosystem. The present analysis reveals presence of good diversity of zooplankton in the lake. In this oxbow lake, three major groups of zooplankton were reported namely, Cladocera, Copepoda and Rotifera. Among the three groups, rotifers are found to dominate the lake ecosystem. Among the 37 taxa reported, 20 were from rotifera group followed by that of cladocera with 13 taxa and 4 taxa from copepoda. On quantitative analysis of zooplankton in the oxbow wetland, shows higher abundance percentage of 58% by rotifera which is reported to be much more higher than that of cladocera and copepod. Higher presence of rotifera in the lake is an indication of its pollution leading to eutrophication in near future. Present investigation may help in conservation of the oxbow lake.
Authors and Affiliations
*Sulata Kar and Devashish Kar
Keywords
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