The objective of the present study was to evaluate the effects of feeding rate and temperature on the quality of larvae of golden trevally Gnathanodon speciosus. The experiment was carried out in three feeding rate (50, 75 and 100%) at three temperatures (30, 32, 34?). Each treatment was repeated five times. The quality of larvae included growth, survival rate, feeding ability and respiration was determined after two weeks of experiment. The results showed that the growth and survival rate increased gradually but the respiratory rate, oxygen consumption and the ability to catch prey tended to decrease gradually with the feeding rate. In the case of temperature was, on the other hand, increased up to 34? caused gradually decrease growth, the survival rate and feeding ability but these parameters increased the respiratory rate and oxygen consumption. Besides, the quality of larvae of golden trevally in the combined treatment of 34? with the 50% feeding rate was lower than that of the other treatments. At the temperature of 30? combined with 100% feeding rate gave the highest survival rate, growth rate, feeding ability and respiration. Thus, if the water temperature is high and the feed in nature condition will be less, it will affect the quality of the larvae of the golden trevally.
Keywords: Golden trevally, Gnathanodon speciosus, feeding rate, temperature.