COMPARATIVE ANALYSIS OF GROWTH PERFORMANCE OF MIXED-SEX AND MONOSEX TILAPIA POPULATION AT DIFFERENTIAL STOCKING DENSITIES UNDER INDIAN PERSPECTIVE.

摘要

Stocking density is considered one of the important factors affecting fish growth. But, information related to impact of stocking density on growth performance of androgen-treated monosex tilapia population under the ecological conditions of Gangeticplains in West Bengal, India is limited. The aim of our study was to compare the growth potential of control and hormone-treated, sex reversed tilapia at various stocking densities and to determine an ideal stocking density for culture of such fish. Control and hormone treated fish were stocked separately in mesh cages at different stocking densities (1, 5, 10, 15, 25, 50, 75 and 100 fry / m3) and it was found that the highest growth was observed for the 50 fish / m3 groups for both the treatment categories. Moreover, the monosex androgen treated population showed much higher growth potential for all the density groups compared to the corresponding mixed-sex population. Thus, culture of hormone treated sex reversed tilapia at a density of 50 fish / m3can be considered ideal for augmented production of the fish under Indian context.