Effects of Taurine Supplementation on the Growth Performance of Juvenile Rock Bream Oplegnathus fasciatus
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An 8-week feeding trial was conducted to investigate the effects of dietary taurine supplementation on the growth performance of juvenile rock bream, Oplegnathus fasciatus. Triplicate groups of 25 fish averaging 2.72 ± 0.04 g (mean ± SD) were fed one of six experimental diets prepared by adding taurine at 0%, 0.25%, 0.5%, 1.0%, 1.5% and 3.0% (Control, Tau0.25, Tau0.5, Tau1.0, Tau1.5 and Tau3.0, respectively). At the end of the feeding trial, the weight gain, specific growth rate and protein efficiency ratio of fish fed the Tau0.5, Tau1.0 and Tau1.5 diets were significantly higher (P < 0.05) than those of fish fed the Control and Tau0.25 diets. The feed efficiency of fish fed the Tau0.5 diet was significantly higher than that of fish fed the Control, Tau0.25 and Tau3.0 diets. Fish fed the Tau1.0 diet had higher whole-body crude protein content than fish fed the Control diet, while the crude lipid content of fish fed the Tau1.5 and Tau3.0 diets was significantly lower than that of fish fed the Control and Tau0.25 diets. An ANOVA suggested that the optimum level of dietary taurine supplementation to improve growth and reduce the body lipid contents of juvenile rock bream, O. fasciatus, was 0.5%, while a broken line analysis of weight gain indicated a level of 0.62%.
Abstract
An 8-week feeding trial was conducted to investigate the effects of dietary taurine supplementation on the growth performance of juvenile rock bream, Oplegnathus fasciatus. Triplicate groups of 25 fish averaging 2.72 ± 0.04 g (mean ± SD) were fed one of six experimental diets prepared by adding taurine at 0%, 0.25%, 0.5%, 1.0%, 1.5% and 3.0% (Control, Tau0.25, Tau0.5, Tau1.0, Tau1.5 and Tau3.0, respectively). At the end of the feeding trial, the weight gain, specific growth rate and protein efficiency ratio of fish fed the Tau0.5, Tau1.0 and Tau1.5 diets were significantly higher (P < 0.05) than those of fish fed the Control and Tau0.25 diets. The feed efficiency of fish fed the Tau0.5 diet was significantly higher than that of fish fed the Control, Tau0.25 and Tau3.0 diets. Fish fed the Tau1.0 diet had higher whole-body crude protein content than fish fed the Control diet, while the crude lipid content of fish fed the Tau1.5 and Tau3.0 diets was significantly lower than that of fish fed the Control and Tau0.25 diets. An ANOVA suggested that the optimum level of dietary taurine supplementation to improve growth and reduce the body lipid contents of juvenile rock bream, O. fasciatus, was 0.5%, while a broken line analysis of weight gain indicated a level of 0.62%.
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