Open AccessReplacement of fish meal in juvenile channel catfish, Ictalurus punctatus , diets using a yeast‐derived protein source: the effects on weight gain, food conversion ratio, body composition and survival of catfish challenged with Edwardsiella ictaluri
Author(s) -
PETERSON B.C.,
BOOTH N.J.,
MANNING B.B.
Publication year - 2012
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.1365-2095.2011.00878.x
Subject(s) - catfish , ictalurus , biology , edwardsiella ictaluri , menhaden , fish meal , feed conversion ratio , protein efficiency ratio , juvenile , weight gain , food science , composition (language) , zoology , fishery , body weight , fish <actinopterygii> , ecology , endocrinology , linguistics , philosophy
We examined the effects of a yeast‐derived protein source (NuPro ® ) as a replacement for menhaden fish meal on weight gain, specific growth rate (SGR), food conversion ratio (FCR), whole‐body composition and disease resistance in juvenile channel catfish (9.9 ± 0.2 g fish −1 ). NuPro ® replaced fish meal at six levels (0, 25, 50, 75, 100 and 125 g kg −1 diet). Catfish were sampled for whole‐body composition and then challenged with the bacterium Edwardsiella ictaluri . Growth performance was negatively affected ( P < 0.01) when NuPro ® was added at 125 g kg −1 diet. The amount of whole‐body fat decreased ( P < 0.05) when NuPro ® was added at 75 g kg −1 or more of the diet. Regardless of the amount of NuPro ® added, survival after challenge with E. ictaluri was similar among treatments. Results indicate that up to 100 g kg −1 of NuPro ® can be added without negatively affecting growth performance. The yeast‐derived protein source used in this study is a sustainable protein alternative that could be used as a partial replacement for fish meal in juvenile channel catfish diets.