Effects of attractants inclusion on the growth and survival of Channa striata
2021
An experiment was conducted to evaluate the efficacy of different natural and artificial attractants in the diet of stripped snakeheads Channa striata. The experiment was conducted into two phases- Nursery and Grow-out. There were four treatments TC (Control), TG (Glycine), TA (Alanine) and TN (Nappi) for each phase with three replicates. In phase-1, the fry/fingerling were fed three times daily for four months; in phase-2, the fish were fed twice daily in the morning and afternoon for six months where the effects of formulated diets were compared with control (TC) which is locally available as commercial feed. In phase-1, significantly (p<0.05) lower FCR (1.58±0.13), higher individual weight gain (91.90 g), higher SGR (2.47±1.79 %/day), higher survival (90%), and higher feeding efficiency (57.60±5.54%) were found in the control (TC) compared to all other treatments. On the other hand, in phase-2, significantly (p<0.05) lower FCR (1.63±0.06), higher individual weight gain (299 g), and higher feeding efficiency (45.96±1.63%) were found in Nappi (TN) supplemented diet whereas significantly (p<0.05) higher survival (93.33%) and higher SGR (0.90±0.17 %/day) were found in Glycine (TG) supplement diet compared to the control (TC). Therefore, domestication and then the addition of natural and artificial attractants in formulated feeds may enhance the efficacy of formulated feeds for better growth and survival of the carnivorous fish like stripped snakeheads especially in grow-out phase. Hence, this finding will help to culture C. striata using protein-rich formulated feed adding attractants rather than depending on any live feed or formulated feed which is not commercially feasible.
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