M. Azizul Islam, Abdullah Harun Chowdhury*, M.A. Hossaini and M. Zaman
Abstract
Five fish nursery ponds were prepared by the biological control method with the help of Catla and Silver Carp without using chemicals.All Copepoda and Cladocera were found to be completely eaten up by these fishes. But Rui, Mrigal and common Carp were ineffective in eliminating these plankton.