Fish and plankton biodiversity in the Kishoreganj haor, Kishoreganj, Bangladesh

Haor is a wetland environment considered as a rich diversified fisheries resource with important role on ecology, economy and social structure. The present study was conducted to evaluate the diversity of fish and plankton communities in the Kishoregonj haor, Kishoreganj, Bangladesh. Fish samples were collected from the fishers and fish landing station for taxonomic study from July 2017 to December 2018. Fish were identified through direct observation and using morphometric and meristic characteristics. A total of 23 genera of phytoplankton belonging to 4 classes were identified. A total 8 genera of Bacillariaophyceae, 9 genera of Chlorophyceae, 3 genera of Cyanophyceae and 3 genera of Euglenophyceae class were listed from the study area. In total 3 groups of zooplankton were identified, i.e. PhylumRotifera, OrderCladocera and Sub-class-Copepoda in Kishoreganj haor. In the present study, a total of 79 species of fishes belonging to 27 families under 9 orders were recorded. Cypriniformes was found as the most dominant order comprising 31 species followed by Siluriformes (21) and Perciformes (15). The result of this study showed that the fish and plankton diversity indices in the Kishoreganj haor are good even some fish species are gradually decreasing.