Feeding periodicity, gastric evacuation rate and daily ration of fingerlings of rohu, Labeo rohita (Hamilton).

摘要

The feeding periodicity of fingerlings of rohu, Labeo rohita was examined from gut collections taken during winter, summer and rainy seasons in Bhadra Reservoir Fish Farm, Karnataka, India. Feeding periodicity was determined by means of mean percentfullness of gut and mean gut content weight/gram body weight of fish. No significant difference in the gut content weight were found between any 2 successive 4 h sampling periods. The evacuation data was fitted to linear regression model. The evacuationtime for rohu fingerlings ranged between 6.73 and 8.95 h. The natural feed evacuated faster than both conventional and pelleted feed. The daily ration was estimated to be 9.20 to 11.12% with average value of 10.28% at 28±1.5℃.