Open AccessImpact of dietary high protein distillers dried grains on amino acid utilization, growth response, nutritional health status and waste output in juvenile rainbow trout ( O ncorhynchus mykiss )
Author(s) -
Prachom N.,
Haga Y.,
Satoh S.
Publication year - 2013
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/anu.12049
Subject(s) - rainbow trout , corn gluten meal , biology , fish meal , distillers grains , feed conversion ratio , food science , aquaculture , methionine , weight gain , zoology , juvenile , protein efficiency ratio , commercial fish feed , body weight , fish <actinopterygii> , fishery , biochemistry , amino acid , ecology , endocrinology
High protein distillers dried grains ( HPDDG ) is a co‐product of ethanol production that uses prefractionation technology. A 14‐week nutrition trial of HPDDG with rainbow trout ( O ncorhynchus mykiss : initial weight = 7.5–7.7 g fish −1 ) was conducted to evaluate the effect of replacing corn gluten meal ( CGM ) with four levels of HPDDG (0, 50, 100 and 150 g kg −1 ). HPDDG is higher in crude protein (481 g kg −1 , CP ) than typical distillers dried grains with soluble ( DDGS ) (270 g kg −1 ). We found that 0–150 g kg −1 HPDDG can be used in diets for rainbow trout. Replacement of CGM by HPDDG did not affect feed utilization efficiency or the health status of fish. The final body weight and phosphorus ( P ) content of fish increased with increasing HPDDG content in the feed. Although increasing dietary HPDDG levels resulted in a reduction in lysine (Lys) and methionine (Met) digestibility, the digestible CP , including Lys and Met, in the experimental diets remained high (above 90%). Better utilization of CP and P by fish fed dietary HPDDG resulted in less waste excretion by these fish than by those fed the control diet. HPDDG may be considered as an alternative protein source for aquaculture feeds.