Water temperature is a major factor influencing growth performance and feed conversion ratio of fish. To optimize the growth and feed conversion ratio of Tor tor through maintenance of optimum water temperature, a 90 days experiment was conducted in complete randomized design from December 2018 to March 2019. Tor tor fingerlings (2.7±0.1g) were stocked in an aquarium maintained with desired temperature range of 19-21°C, 24-26°Cand 29-31°C and was replicated five times such that 15 aquariums were kept for the intensive study. Ten such fingerlings were kept in each aquarium. The fingerlings were fed with a diet containing 30% crude protein and 4% of wet body weight twice a day, at 6:00 and 15:00 hours and a natural photoperiod was maintained during the experiment. There were few efforts to enhance growth of Mahaseer species through optimizing the water temperature. The aim of this research is to identify the optimal water temperature for growing Tor tor. Among different water, significantly higher body weight (3.892±0.125 g) and total length (7.66±0.059 cm) was observed under water temperature range of 29-31°C. This was followed by body weight of 3.512±0.193 g and total length of 7.34±0.031cm under water temperature range of 24-26°C which was statistically at par with water temperature of 19-21°C. Best feed conversion ratio of 3.722 was obtained at 29-31°C. Temperature significantly affect different growth attribute of fingerlings. This experiment clearly demonstrated that 29-31°C is the most effective for rearing Tor tor.
EFFECT OF WATER TEMPERATURE ON THE GROWTH PERFORMANCE AND FEED CONVERSION RATIO OF SAHAR (TOR TOR)
