Effects of Feeding Levels on Growth Response, Body Composition, and Energy Expenditure in Blackspot Seabream, Pagellus bogaraveo, Juveniles

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Rodrigo Otavio D de Almeida Ozorio (Autor) Outra; Carlos Andrade (Autor) Outra; Viriato Manuel F A Freitas Andrade Timoteo (Autor) Outra; Luis Eugenio C Castanheira da Conceicao (Autor) Outra; Luisa Maria P Pinheiro Valente (Autor) ICBAS

Revista

Título: Journal of the World Aquaculture Society

Vol. 40

Páginas: 95-103

ISSN: 0893-8849

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 17 Citações

Classificação Científica

FOS: Ciências agrárias > Agricultura, silvicultura e pescas

Outras Informações

ID Authenticus: P-003-NJY

DOI: 10.1111/j.1749-7345.2008.00231.x

Abstract (EN): Although reported as a slow growing species, to date information regarding nutritional dynamics of blackspot seabream, Pagellus bogaraveo, is limited, especially during ongrowing phase. This study determined the effects of different feeding levels on growth response, body composition, and energy expenditure of blackspot seabream juveniles (initial weight = 64 g). Fish were allocated in nine indoor tanks (15 fish per tank) and fed a basal diet twice daily at increasing levels (2.5, 3.3, and 4.1 g feed/kg(0.8)/d) for 138 d. Growth response decreased with decreasing feeding levels, but only at 2.5 g feed/kg(0.8)/d (P < 0.001). Differences in growth rates were positively correlated with body lipid content (r(2) = 0.90). Net protein utilization decreased with each increase in feeding level. The energy requirement for zero growth (maintenance) and the estimated energy loss on starvation were calculated as 22.6 and 17.9 kJ/kg(0.8)/d, respectively. The energy cost for protein and lipid gain was calculated as 3.8 and 1.4 kJ/kJ energy deposited, respectively. This study suggested that blackspot seabream may grow slower than the other close-related species because of its higher demand of dietary protein energy in favor of lipid deposition.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9