Document Detail

Feed consumption, growth and growth efficiency of rainbow trout (Oncorhynchus mykiss (Walbaum)) fed on diets containing a bacterial single-cell protein.
MedLine Citation:
PMID:  7794874     Owner:  NLM     Status:  MEDLINE    
The aim of the present study was to compare the nutritive value of bacterial single-cell protein (BSCP) with that of fishmeal in rainbow trout (Oncorhynchus mykiss (Walbaum)). Four diets were formulated to contain a total of 458 g crude protein/kg of which 0% was from BSCP in diet 1 (BSCP-0), 25% in diet 2 (BSCP-25), 62.5% in diet 3 (BSCP-62.5) and 100% in diet 4 (BSCP-100); the remainder of the protein was from fishmeal. There were two studies: in study 1, duplicate groups of twenty-five fish were fed on one of the four experimental diets at the rate of 20 g/kg body weight per d for 132 d. Feed consumption rates of individual fish were measured using radiography and the overall apparent absorption efficiency for N in each group was measured over a 2-week period. In study 2, N intake, consumption, absorption and accretion were measured for each fish under controlled environmental conditions (12 h: 12 h light-dark regime; 14 degrees). Higher dietary levels of BSCP resulted in significantly higher feed consumption rates but reduced N absorption efficiency and growth rates. However, a diet containing 25% BSCP (75% fishmeal) did not significantly influence growth rates, feed consumption and absorption efficiency compared with a 100% fishmeal diet. The N growth efficiencies were highest in fish fed on the diet containing the highest level of fishmeal and significantly decreased with increasing BSCP content. Construction of N budgets demonstrated that the reduction in growth in fish eating an increasingly larger proportion of BSCP was due to a decrease in N absorption and an increase in the excretion of urea.
W M Perera; C G Carter; D F Houlihan
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The British journal of nutrition     Volume:  73     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  1995 Apr 
Date Detail:
Created Date:  1995-08-01     Completed Date:  1995-08-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  591-603     Citation Subset:  IM    
Department of Zoology, University of Aberdeen.
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MeSH Terms
Bacterial Proteins / administration & dosage*
Dietary Proteins / administration & dosage*
Fish Products
Intestinal Absorption
Nitrogen / metabolism
Nutritive Value
Oncorhynchus mykiss / growth & development*,  metabolism
Reg. No./Substance:
0/Bacterial Proteins; 0/Dietary Proteins; 0/single cell proteins; 7727-37-9/Nitrogen

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