The study was carried out to evaluate the effect of temperature and salinity on digestibility, growth performance and feed utilization of snakehead (Channa striata). The experiment was conducted to evaluate the growth and feed utilization of snakehead fingerlings (6.53±0.09 g). After 8 weeks, snakehead growth performance and feed utilization efficiency increased with decreasing salinities at higher temperatures. The highest survival rate (98.9%), daily weigh gain (0.72 g/day), specific growth rate (3.51 %/day) were found in the treatment 31°C-0‰, which were not significant difference to 28oC-0‰, 28oC-6‰ and 34°C-0‰ treatments. The lowest growth and survival rate were found in the treatment 34°C-9‰ (66.7%) and 34°C-6‰ (68.9%), which were significantly lower than that of the others. Food conversion ratio in treatment 34°C-9‰ (1.23) was significantly higher than other treatments. In conclusion, combined temperature and salinity significantly affect snakehead growth performance and feed utilization.
Funding information
This study is funded in part by the Can Tho University Improvement Project VN14-P6, supported by a Japanese ODA loan.