Effective replacement of protein-bound amino acids by crystalline amino acids in Senegalese sole (Solea senegalensis) juveniles

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Perez Jimenez, A (Author) Other; Peres, H (Author) FCUP; Oliva Teles, A (Author) FCUP

Journal

Title: Aquaculture Nutrition

Vol. 20

Pages: 60-68

ISSN: 1353-5773

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 12 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-009-38N

DOI: 10.1111/anu.12052

Abstract (EN): The objective of this study was to evaluate the potential of free amino acids to replace protein-bound amino acids in diets for Solea senegalensis juveniles. For this purpose, fish with 4.26g mean initial weight were fed during 55days with diets containing 500gkg(-1) protein and 100gkg(-1) lipid, based on fish meal and fish oil as main protein and lipid sources (control diet), or diets where 20%, 35% and 50% of fish meal were replaced by crystalline amino acids, using L-lysine HCl as lysine source. To access the efficiency of the crystalline lysine source, another diet was formulated with 35% fish meal replacement but using L-lysine sulphate instead of L-lysine HCl as lysine source. Overall, growth performance, feed utilization, nutrient retention, whole-body and amino acid composition did not show significant differences among groups. In conclusion, up to 50% protein-bound amino acids can be replaced by crystalline amino acids in diets for Senegalese sole juveniles without negative effects in fish performance. Additionally, it was shown that L-lysine sulphate and L-lysine-HCl may be used interchangeably by Senegalese sole juveniles, with the potential economic benefits involved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9