Premium
Preliminary study on effects of methionine hydroxy analog and taurine supplementation in a soy protein concentrate‐based diet on the biological performance and amino acid composition of rainbow trout [ Oncorhynchus mykiss ( W albaum)]
Author(s) -
Boonyoung Suttisak,
Haga Yutaka,
Satoh Shuichi
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03138.x
Subject(s) - taurine , methionine , rainbow trout , fish meal , biology , feed conversion ratio , soy protein , protein efficiency ratio , food science , meal , zoology , amino acid , biochemistry , endocrinology , body weight , fishery , fish <actinopterygii>
A feeding trial was conducted on the effects of methionine hydroxy analog ( MHA ) and taurine supplementation in diets with high levels of soy protein concentrate ( SPC ) on the growth performance and amino acid composition of rainbow trout, Oncorhynchus mykiss ( W albaum) comparing with fish meal based diet. The control diet had 520 g kg −1 fish meal. In the methionine deficient diets (5.1 g kg −1 ), fish meal was replaced by 490 g kg −1 of the SPC in the SPC 49 diet. The SPC 49 diet was supplemented with either MHA (6 g kg −1 ) only or a combination of MHA and taurine (2 g kg −1 ). Fish were fed isoproteic (460 g kg −1 ) and isolipidic (130 g kg −1 ) diets for 12 weeks. Growth performance (i.e. weight, feed conversion ratio, and thermal‐unit growth coefficient) was inferior in fish fed the SPC 49 diet. MHA supplementation improved growth performance ( P < 0.05). No difference was observed when taurine was added to the SPC 49 and MHA diet ( P > 0.05). Whole‐body taurine contents increased with taurine supplementation, whereas plasma methionine increased with MHA supplementation ( P < 0.05). In conclusion, the substitution of fish meal with SPC supplemented with MHA did not negatively impact growth, and the addition of taurine did not improve growth performance in rainbow trout.