Effect of different feeding levels on the production of Heterobranchus bidorsalis in outdoor concrete tanks.

摘要

Fry of Heterobranchus bidorsalis (mean weight, 0.03±0.01 g) were fed at 10, 20, 30, 40 or 50% of their body weight (bw)/day in outdoor concrete tanks. The fry attained the highest average weight of 6.66 g in 10 weeks when fed at 40% bw/day. Feed conversion ratio ranged from 2.13 to 9.65, protein efficiency ratio from 1.33 to 5.93. Results indicated that H. bidorsalis are efficient feed converters. Feed intake was significantly different (P < 0.05) between the treatments, specific growth rate (SGR),daily growth rate (DGR), production and average weight gain indicated, that 40% of fish biomass was the optimum feeding level.