Effects of dietary l-carnitine supplementation on growth performance and incrased water temperature on survival rate of juvenile yellow princess (Labidochromis caeruleus Fryer, 1956)

In this study, it is aimed to reduce the impacts of stress factors which were especially caused by global warming in fish farming in recent years. As a result of many researches, L-carnitine substance, which is believed to increase tolerance of fishes to stress factors, was used in this experiment. In this context, the effect of L-carnitine supplemented feed on growth and survival rate at high temperature for the yellow princess juvenile (Labidochromis caeruleus, Fryer, 1956) was investigated in this study. As a fish material, 395 yellow princess juvenile with an average live weight of 0.46±0.09 g which are obtained from a private firm were used. Experiment period; 60 days of feeding with L-carnitine supplemented feed, and 7 days of exposure to high temperature, totaling 67 days. 0, 500, 1000 and 2000 mg/kg L-carnitine were added to the experiment diets. At the end of the experiment; the group fed with 500 mg/kg L-carnitine supplemented feed had higher live weight gain (p<0.05). In the first part of the experiment, the survival rate was 90 %, 89 %, 83 % and 87 % , at 0, 500, 1000 and 2000 mg/kg experiments, respectively. In the second part of the experiment; the values were found to be 97 %, 97 %, 97 % and 96 %. As a result; L-carnitine supplemented feed has been found to have a positive effect on the growth of yellow princess juvenile and not important differences on the survival rates of living under stress (p≥0.05).