Taurine requirement for growth and nitrogen accretion of European sea bass (Dicentrarchus labrax, L.) juveniles

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Martins, N (Author) Other; Estevao Rodrigues, T (Author) Other; Diogenes, AF (Author) Other; Diaz Rosales, P (Author) Other; Oliva Teles, A (Author) FCUP; Peres, H (Author) FCUP

Journal

Title: Aquaculture

Vol. 494

Pages: 19-25

ISSN: 0044-8486

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 25 Citations

Scopus - 28 Citations

Other information

Authenticus ID: P-00Q-A5B

DOI: 10.1016/j.aquaculture.2018.05.007

Abstract (EN): A growth trial was conducted to determine the dietary taurine requirement for European sea bass juveniles fed plant feedstuffs-based diets. Eight isoproteic (45% crude protein) and isolipidic (18% crude lipid) diets were formulated containing a mixture of plant feedstuffs and fish meal (corresponding to 80% and 20% of total dietary protein, respectively) and taurine (Tau) levels ranging from 0.2 to 1.7% (diets 0.2Tau; 0.3Tau; 0.4Tau; 0.5Tau; 0.7Tau; 0.9Tau; 1.2Tau; 1.7Tau). Triplicate groups of 12 fish (IBW = 55 g) were fed each diet for 10 weeks. Dietary Tau level up to 0.7% improved growth performance while maximum feed efficiency and protein efficiency ratios were obtained with a dietary Tau level of 1.2%. Whole-body lipid content of fish fed the 1.2 and 1.7% Tau diets was lower than in the other groups, while whole-body protein and ash contents, and hepatosomatic and visceral indexes were not affected by diet composition. Daily growth index, nitrogen retention, and feed efficiency were fitted to Tau levels using different models. The five-saturation kinetics model was selected as the more parsimonious model, and based on this model the dietary Tau requirement for European sea bass juveniles under the present experimental conditions was estimated to be 0.47-0.50% DM.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7