Open AccessEvaluation of Soybean Meal‐Red Blood Cell Coextruded Feed Ingredient in Diets Fed to Rainbow Trout Oncorhynchus mykiss
Author(s) -
Selden George L.,
Brown Paul B.,
Ostrowski Anthony C.,
Flores Rolando A.,
Johnson Lawrence A.
Publication year - 2001
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.2001.tb00467.x
Subject(s) - rainbow trout , ingredient , biology , soybean meal , fish meal , food science , feed conversion ratio , meal , blood meal , zoology , fishery , body weight , fish <actinopterygii> , ecology , raw material , endocrinology
.— Fish meal is one of the predominant sources of crude protein used in practical feeds for most cultured species. However, with overfishing and increasing demand for protein feedstuffs, new competitively priced sources of dietary protein are needed. A coextruded soybean meal‐red blood cell (SBM‐RBC) ingredient was evaluated as a source of crude protein for rainbow trout Oncorhynchus mykiss . The SBM‐RBC ingredient was incorporated at either 0, 21, 42 or 63% of the dietary protein, replacing an isoni‐trogenous amount of fish meal. All diets were fed for 8 wk to triplicate groups of juvenile rainbow trout (average initial weight 49.5 g) stocked into a recirculating system consisting of 48, 114‐L aquaria. There were no significant differences in weight gain, feed conversion ratio, protein efficiency ratio, apparent crude protein digestibility, apparent gross energy digestibility, dress‐out percentage, or fillet protein and fat concentrations in fish fed any of the experimental diets. Based on these data, extruded SBM‐RBC appears to be a suitable ingredient in diets fed to rainbow trout.