Studies of the biological relation for entomo-fauna and lchthyo fauna

Abstract

The present investigation was studied at different ponds of the Chapra District This pond passes with many effluents. Its annual average depth is 6-8 metres. It receives effluents from sugar factory, town sewage and Jute mill. It also receives pollutants from remains of dead and burnt bodies. Agrochemicals are also coming into the stream of river from adjoining areas. River is also being polluted by different human activities such as boating, extensive fishing, human and animal bathing, cloths washings. To study the effect of se age on the limnology of pond, four sites have been selected.