Om Prakash Akinchana & Arun Kumarb*
aDepartment of Zoology, B.R.Ambedker University, Muzaffarpur, Bihar, India
bP.G. Department of Zoology, B.N.Mandal University, Madhepura, Bihar, India
Received : 28th April, 2020 ; Revised : 30th May, 2020
Abstract– The density of benthic macro-biota in number over weight of biomass at three sampling stations of Teesta river sub Himalayan region has been studied, it was found that the Caddis fly larvae was the most dominant component and contributed 52.41% in the macro-biota. These animals were abundant in Teesta river when benthic algae were abundant, water is well oxygenated, alkaline and contains sufficient nutrients but observed to be less abundant during high velocity of water, high river depth and higher turbid waters.