Evaluation of rapeseed protein concentration as protein source of diet forRed sea bream

Citation
K. Takii et al., Evaluation of rapeseed protein concentration as protein source of diet forRed sea bream, FISHERIES S, 65(1), 1999, pp. 150-154
Citations number
31
Categorie Soggetti
Aquatic Sciences
Journal title
FISHERIES SCIENCE
ISSN journal
09199268 → ACNP
Volume
65
Issue
1
Year of publication
1999
Pages
150 - 154
Database
ISI
SICI code
0919-9268(199902)65:1<150:EORPCA>2.0.ZU;2-M
Abstract
Bed sea bream Pagrus major having a mean body weight of 18.5 g were reared on diets containing 0, 10, 20, and 30% of rapeseed protein concentrate (RPC ) for 52 days. Glucosinolates, sinapine, and phytic acid contents of RPC we re respectively 0.58 mu mol/g, 0.2%, and 4.4%. Final mean body weights of f ish fed the 20 and 30% RPC diets were lower than fish fed the 0 and 10% RPC diets. No significant differences among the dietary treatments were found in daily feed intake, feed efficiency, protein efficiency ratio, hematology , and relative weight of the hepatopancreas, stomach and intestine to body weight, Crude fat content of the whole body fell, but that of the hepatopan creas increased with an increase in diet RPC levels. Hematological characte r and plasma total protein, albumin, cholesterol, Mg and Zn concentrations did not show any differences among the dietary treatments. However, plasma P concentrations of fish fed the 0 and 10% RPC diets were higher than fish fed the 30% RPC diet. Moreover, apparent protein and sugar digestibilities fell slightly with an increase in dietary RPC contents. These results sugge st that a practically substituitve limit with RPC for dietary brown fish me al is about 10% in red sea bream.