Growth performance and body composition of white seabream (Diplodus sargus) juveniles fed diets with different protein and lipid levels

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Ozorio, ROA (Author) Other; Valente, LMP (Author) ICBAS; Pousao Ferreira, P (Author) Other; Oliva Teles, A (Author) FCUP

Journal

Title: Aquaculture Research

Vol. 37

Pages: 255-263

ISSN: 1355-557X

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 62 Citations

Scopus - 70 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-004-NBC

DOI: 10.1111/j.1365-2109.2005.01427.x

Abstract (EN): An 83-day feeding trial was carried out to determine the effect of different dietary protein and lipid levels on the growth performances and carcass composition of white seabream. Juveniles (10.7 +/- 0.2 g) were fed to satiation on four diets, varying in protein (15% and 28%) and lipid (12% and 16%) levels. The best growth performance was observed in fish fed on diets with higher protein level. Dietary lipids did not affect growth performance. Voluntary feed intake decreased with a increasing dietary protein level at both dietary lipid levels. Feed conversion ratio improved with the increase in dietary protein and lipid levels. Carcass composition remained unaltered by dietary protein levels (P > 0.05). Carcass protein content tended to decrease, while lipid content tended to increase in groups fed on 16% lipid, compared with the 12% lipid groups. Additionally, protein retention was higher in fish fed on low-protein and low-lipid levels, compared with the high-protein and high-lipid group (29% vs. 19%). Lipid retention increased significantly with dietary protein level (P < 0.001). Energy retention improved with dietary protein, but was not affected by dietary lipid levels. On the basis of our results, feeding white seabream on 15% dietary protein had a negative effect on growth and feed utilization. Dietary lipid did not induce a protein-sparing action in Diplodus sargus juveniles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9