Open AccessDietary methionine requirement for juvenile rockfish, Sebastes schlegeli
Author(s) -
YAN Q.,
XIE S.,
ZHU X.,
LEI W.,
YANG Y.
Publication year - 2007
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/j.1365-2095.2007.00461.x
Subject(s) - sebastes , rockfish , methionine , biology , dry matter , cystine , feed conversion ratio , juvenile , fish meal , zoology , amino acid , weight gain , protein efficiency ratio , food science , biochemistry , body weight , fish <actinopterygii> , fishery , cysteine , endocrinology , ecology , enzyme
A 65‐day growth trial was conducted at 19.5 °C to determine the optimal dietary methionine for juvenile rockfish, Sebastes schlegeli . Semipurified diets were formulated to be isonitrogenous and isoenergetic. Fish meal was used as intact protein source and crystal amino acid was used as a part of dietary protein. Six experimental diets were formulated to contain 5.8, 10.8, 15.8, 20.8, 25.8 and 30.8 g kg −1 dietary methionine. The results showed that dietary methionine significantly affected specific growth rate, weight gain, food conversion ratio, protein productive value (PPV), energy retention efficiency, carcass index and body composition. No significant difference was found in hepatosomatic index. The dietary methionine requirement for maximum growth was 13.7 g kg −1 dry matter or 28.0 g kg −1 of dietary protein when cystine content was 1.2 g kg −1 dry matter.