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Titolo:
The effects of soybean-based diets, with and without amino acid supplementation, on growth and biochemical composition of juvenile American lobster, Homarus americanus
Autore:
Floreto, EAT; Bayer, RC; Brown, PB;
Indirizzi:
Univ Maine, Orono, ME 04469 USA Univ Maine Orono ME USA 04469Univ Maine, Orono, ME 04469 USA Purdue Univ, Dept Forestry & Nat Resources, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 Resources, W Lafayette, IN 47907 USA
Titolo Testata:
AQUACULTURE
fascicolo: 3-4, volume: 189, anno: 2000,
pagine: 211 - 235
SICI:
0044-8486(20001002)189:3-4<211:TEOSDW>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRAWN MACROBRACHIUM-ROSENBERGII; PENAEUS-MONODON; MARINE SHRIMP; FATTY-ACIDS; PROTEIN; ARGININE; PHOSPHOLIPIDS; REQUIREMENTS; REPLACEMENT; NUTRITION;
Keywords:
Homarus americanus; soybean diets; crustacean nutrition; amino acids; fatty acids; amino acid supplementation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Floreto, EAT 136 Applefield Dr, Scarborough, ON M1P 3Y2, Canada 136 Applefield Dr Scarborough ON Canada M1P 3Y2 3Y2, Canada
Citazione:
E.A.T. Floreto et al., "The effects of soybean-based diets, with and without amino acid supplementation, on growth and biochemical composition of juvenile American lobster, Homarus americanus", AQUACULTURE, 189(3-4), 2000, pp. 211-235

Abstract

The feasibility of feeding soy-based diets for the pound culture of the American lobster was investigated in a factorial study using diets (40% protein) containing various proportions of extruded-expelled, low-fat soybean meal (SBM) (0%, 25%, 50%, 75%, 87.5% and 100% of dietary protein) and fish meal (FM), with and without amino acid supplementation (arginine, leucine, methionine and tryptophan), in a 60-day feeding trial using late Stage 5 juveniles. The supplemental amino acids were added at levels to simulate the essential amino acid (EAA) profile of juvenile lobsters. The 0% SBM diet approximated salted fish and fish racks, the industry diet for pounded lobsters. A diet of fresh blue mussel, a component of the lobster's natural diet, was included for comparison. Supplementation and SBM levels of not more than50% of dietary protein significantly resulted in higher body weight gains (BWGs) than diets without supplementation or with higher SBM levels. Survival was not significantly different for juveniles fed the supplemented dietsand the non-supplemented diets containing FM. Juveniles fed the non-supplemented 100% SBM diet suffered early mortality. Supplementation significantly shortened molting cycles and was crucial for survival in juveniles fed the 100% SBM diet. Interactions between supplementation and level of dietary SBM on survival, BWG and duration of the molting cycle were significant. Growth performance of juveniles fed blue mussel were comparable to those of juveniles fed the supplemented 50% SBM diet. The levels (% of protein) of arginine, phenylalanine and tryptophan were significantly higher in juvenilesfed the supplemented diets, while tyrosine, aspartate, glutamate and serine were significantly higher in juveniles fed the non-supplemented diets. Arginine levels in juveniles fed the supplemented diets were nearly twice those of juveniles fed the non-supplemented diets. Interactions between SBM level and supplementation on lobster amino acid profile were not significant. Supplementation and decreasing levels of dietary SBM (lower content of 18:2n - 6, the major polyunsaturated fatty acid (PUFA) in SBM) were associatedwith better growth and resulted in increasing proportions (% of total) of 20:5n - 3, 22:6n - 3 and n - 3/n - 6 PUFA ratios in juvenile carcass. Basedon weight gain, replacement of fish protein with SBM in practical diets atno more than 50% of dietary protein appears feasible, with multiple amino acid supplementation significantly enhancing growth performance. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 06:36:28