Ravi Shankar Piska and K. Divakara Chary
Abstract
The present study deals with the effect of trophic nature of reservoirs on the reproductive capacity of a freshwater cat fish, Mystus bleekeri (Day). Three reservoirs are selected for this study, an oligotrophic reservoir â Osmansagar, a mesotrophic reservoir â Mir Alam reservoir and eutrophic reservoir â Hussainsagar. The fish are collected from three reservoirs during its breeding season and estimated absolute and relative fecundities in each reservoir. The oligotrophic resevoir is treated as a control. The absolute and relative fecundities are declined significantly (P < 005) in eutrophic and are increased significantly (P> 0.05) in mesotrophic reservoir. This indicates that the trophic nature of reservoir plays a pivotal role on reproductive capacity of the fish.