Ecology, Environment and Conservation Paper

FISH YIELD IN CARP CULTURE PONDS UNDER DIFFERENT MANAGERIAL PRACTICES IN THE ENVIRONS OF LAKE KOLLERU, ANDHRA PRADESH, INDIA

P. Padmavathi and M. K. Durga Prasad

Abstract

The culture of Indian major carps in the environs of lake Kolleru has developed tremendously and the carp yield in different ponds per unit area is markedly varying from 2 to I 5 t/ha/year. This variation is mainly due to the different managerial practices adopted in this area with respect to the quality and quantity of different inputs such as fish stocking densities, fertilizers, supplementary feeds and maintenance of environmental factors. To know the impact of such variations on fish yield, three different carp culture ponds were selected. The fish yields obtained were 3,76, 5.75 and 14.63 t/ ha/year in pond A, B and C respectively. The cumulative effect of the factors manipulated in the three ponds was studied and the results were discussed based on the managerial practices adopted.