Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Protein/lipid ratios in extruded diets for Atlantic cod (Gadus morhua L.):effects on growth, feed utilisation, muscle composition and liver histology
Autore:
Morais, S; Bell, JG; Robertson, DA; Roy, WJ; Morris, PC;
Indirizzi:
Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland Univ StirlingStirling Scotland FK9 4LA ture, Stirling FK9 4LA, Scotland Trouw Aquaculture, Renfrew Mill, Renfrew PA4 8BF, Scotland Trouw Aquaculture Renfrew Scotland PA4 8BF ll, Renfrew PA4 8BF, Scotland
Titolo Testata:
AQUACULTURE
fascicolo: 1-2, volume: 203, anno: 2001,
pagine: 101 - 119
SICI:
0044-8486(20011126)203:1-2<101:PRIEDF>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEABREAM SPARUS-AURATA; HALIBUT HIPPOGLOSSUS-HIPPOGLOSSUS; NUTRITIONAL ENERGETICS; DICENTRARCHUS-LABRAX; FILLET COMPOSITION; BODY-COMPOSITION; ENERGY CONTENT; LIPID-LEVEL; FISH; FAT;
Keywords:
Gadus morhua; aquaculture; diet; cod liver oil;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Bell, JG Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland Univ Stirling Stirling Scotland FK9 4LA rling FK9 4LA, Scotland
Citazione:
S. Morais et al., "Protein/lipid ratios in extruded diets for Atlantic cod (Gadus morhua L.):effects on growth, feed utilisation, muscle composition and liver histology", AQUACULTURE, 203(1-2), 2001, pp. 101-119

Abstract

Atlantic cod is a species with a high biological potential for aquaculture. Nowadays, as a result of the decline of natural stocks and increase in market value of cod, it is regarded as an alternative species with high potential for commercial farming. Therefore, one of the priorities for development of a profitable commercial activity is formulation of cost-effective diets. The present work was developed with the aim of testing four extruded dietsdiffering in the levels of protein (48% or 58%) and lipid (12% and 16%). Asecond objective was to verify whether the producers could profit from thelipid-rich livers characteristic of farmed cod, exploiting it as a source of cod liver oil for human health purposes. A 16-week growth trial was conducted with juvenile cod (233 g, average total weight) using three replicates per treatment. Length measurements were performed every 4 weeks and samples of muscle and liver were taken for totallipid, lipid classes and fatty acid determination, proximate analysis and liver histology. The effect of the diets was evaluated based on growth (SGRand GF3), feeding performance (FCE, PER), condition, hepatosomatic index and biochemical composition. The tested diets induced good performance results, with a protein sparing effect by lipid and a more efficient use of protein in diets with a lower protein content being clear at 12 weeks but not so obvious after 16 weeks ofculture. It is the authors' opinion that the 48/16 diet appeared to be thebest compromise between growth, feed utilisation and cost. The diets with a higher lipid level induced a higher HSI and lipid content in the liver, The muscle and particularly the liver FA profile, reflected that of the diets. The FA profile of farmed cod liver oil showed promising properties, despite having a slightly higher content of saturated fatty acids and linoleic acid, compared to "natural" cod liver oil. (C) 2001 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 05/12/20 alle ore 19:47:52