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Titolo:
PRELIMINARY ASSESSMENT OF THE SEAWEED PORPHYRA-PURPUREA IN ARTIFICIALDIETS FOR THICK-LIPPED GREY MULLET (CHELON LABROSUS)
Autore:
DAVIES SJ; BROWN MT; CAMILLERI M;
Indirizzi:
UNIV PLYMOUTH,DEPT SCI BIOL,DRAKE CIRCUS PLYMOUTH PL4 8AA DEVON ENGLAND UNIV PLYMOUTH,DEPT SCI BIOL PLYMOUTH PL4 8AA DEVON ENGLAND
Titolo Testata:
Aquaculture
fascicolo: 1-4, volume: 152, anno: 1997,
pagine: 249 - 258
SICI:
0044-8486(1997)152:1-4<249:PAOTSP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
RED-SEA BREAM; TILAPIA OREOCHROMIS-MOSSAMBICUS; ASCOPHYLLUM-NODOSUM; FEED-EFFICIENCY; PROTEIN-SOURCE; GROWTH; MEAL; FRY;
Keywords:
CHELON LABROSUS; SEAWEED MEAL; NUTRITIONAL VALUE; GROWTH AND FEED UTILIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
S.J. Davies et al., "PRELIMINARY ASSESSMENT OF THE SEAWEED PORPHYRA-PURPUREA IN ARTIFICIALDIETS FOR THICK-LIPPED GREY MULLET (CHELON LABROSUS)", Aquaculture, 152(1-4), 1997, pp. 249-258

Abstract

A 70-day feeding trial was conducted to assess the nutritional value of Porphyra purpurea meal in experimental diets for juvenile thick-lipped grey mullet. Three isonitrogenous (47% crude protein), lipid and carbohydrate balanced, isocaloric (20 kJ g(-1)) diets wen: formulated. The control diet contained fish meal as the principal protein source; in the other two diets, seaweed meal was included to effectively replace 9 and 18% of the fish meal component. The trial revealed that optimal growth, both in terms of weight gain and specific growth rate, was attained in mullet fed the diet without seaweed; increasing levels of seaweed in the diet resulted in reduced growth response. A steady growth rate was observed in all treatments, obtaining satisfactory weight gains with the diets containing seaweed. Feed conversion efficiency, protein efficiency ratio and net protein utilization were also found todecrease with increasing levels of seaweed in the diet. This preliminary study has demonstrated that the use of the macroalga P. purpurea, as an ingredient in the diets of warmwater fish, such as mullet, has limitations with respect to growth performance and feed utilization. Nevertheless, partial substitution of nutritionally superior fish meal with seaweed may prove to be cost effective. Various approaches towardsthe possible improvement of the nutritional value of seaweeds are discussed in this context. (C) 1997 Elsevier Science B.V.

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Documento generato il 25/11/20 alle ore 03:54:39