Evaluation of Zooplankton Dynamics of Kiri Reservoir, Shelleng Local Government, Adamawa State, Nigeria

A study on the evaluation of zooplankton of Kiri reservoir was conducted over a period of eighteen months (March, 2017- August, 2018) using standard methods. Twenty two (22) species were observed during this study and 7 species were represented by Clodocera (Moina sp., Bosmina sp., Chydorus sp., Daphnia, Sida, Leptodora sp., Simocephalus sp.), 4 species of Copepoda were identified ( Nauplius larvae, Cyclos, Metacydops, Diaptomus), 9 species of Rotifera, ( Asplancia, Rotaria sp., Trichocerca sp., Filinia sp., Brachionus sp., Euclanis sp., Notholca sp., Testidunella., Monostyla sp)., Ostrecoda with only 1 species (Cypridopsis sp.) and Decapoda, 1 species (peneaus sp.) was also identified. The abundance of zooplankton in Kiri reservoir followed a sequence as Rotifera > Cladocera > Copepoda > Ostracoda>Decapoda. Zooplankton was higher during the dry season than the rainy season for the period of this study. This may be as a result of water clarity and increased primary productivity of the Reservoir. They differ significantly in season and sites with site II recorded the highest abundance of the Zooplankton.