Effect of taurine supplemented practical diet on growth performance and taurine contents in whole body and tissues of juvenile Japanese flounder Paralichthys olivaceus

Abstract

The effect of dietary taurine on juvenile Japanese flounder was determined by feeding three taurine-supplemented experimental diets (TAU) and a commercial diet (CD) to evaluate a practical diet for juvenile Japanese flounder. Juvenile Japanese flounder were reared on the three experimental diets supplemented with taurine at 0, 0.5, 1.0% and CD. These diets were fed to juvenile Japanese flounder of an initial mean body weight of 0.2 g for 6 weeks at 20∞C and the taurine contents of the whole body and tissues were analyzed. The final average body weight of juvenile Japanese flounder fed the 1.0% TAU was significantly higher than that of the other groups. Taurine contents in the whole body and tissues increased with the increase in dietary taurine level. These results indicate that juvenile Japanese flounder require at least 15 mg/g taurine in the diet, even though a combined mix of fish, krill and squid meal was the main protein source in the experimental diets.

Investigation of biomarkers of early taurine deficiency in Florida pompano Trachinotus carolinus

“…Similar observations were made in other species such as dentex Dentex dentex, summer flounder Paralichthys dentatus, Japanese flounder Paralichthys olivaceus, and red sea bream Pagrus major (Chatzifotis et al, 2008;Enterria et al, 2011;Kim et al, 2005;Matsunari et al, 2008b). Additionally, methionine supplementation does not influence the taurine status in rainbow trout , and dietary supplementation of cysteine increased tissue cystathionine, but not tissue taurine in juvenile Japanese flounder (Park et al, 2002).Since methionine is the precursor of cysteine via cystathionine and cysteine is used in the synthesis of taurine, this suggests inadequate synthesis rather than inadequate substrate availability for synthesis.…”

Role of taurine deficiency in inducing green liver symptom and effect of dietary taurine supplementation in improving growth in juvenile red sea bream Pagrus major fed non-fishmeal diets based on soy protein concentrate

“…In fish species, the capacity for taurine synthesis is species-specific, and in highly carnivorous species such as bluefin tuna Thunns thynus, yellowtail, Japanese flounder Paralichthys olivaceus, and red sea bream it is markedly low or negligible [13,14]. In addition, the taurine requirement of yellowtail [37] and Japanese flounder [38,39] juveniles fed FM-based diets is more than 10 mg/g diet and about 15 mg/g diet, respectively, and for juvenile red sea bream fed a casein-based diet, it is 5 mg/g diet [40]. It is reported that dietary taurine supplementation improved growth performance of glass eel Anguilla anguilla [41] fed casein-based diets, and of cobia Rachycentron canadum [42], European sea bass Dicentrarchus labrax [43], and common dentex Dentex dentex [44] fed diets where FM was partially replaced with alternative protein sources.…”

Replacing fishmeal and fish oil in industrial aquafeeds for carnivorous fish

“…In contrast, in freshwater species a taurine requirement has been observed only in rainbow trout fed FM-free diets (Gaylord et al, 2006, though such taurine requirement is still controversial (Boonyoung et al, 2013). In some marine species the estimated taurine requirement is considerably high (Goto et al, 2001;Kim et al, 2005;Qi et al, 2012;Lim et al, 2013) and this may help explain why a taurine requirement has been established essentially in marine fish, even when fed FM-containing diets.…”