Solubility and peptide profile affect the utilization of dietary protein by common carp (Cyprinus carpio) during early larval stages

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Carvalho, AP (Author) FCUP; Sa, R (Author) Other; Oliva Teles, A (Author) FCUP; Bergot, P (Author) Other

Journal

Title: Aquaculture

Vol. 234

Pages: 319-333

ISSN: 0044-8486

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 72 Citations

Scopus - 81 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-000-AE1

DOI: 10.1016/j.aquaculture.2004.01.007

Abstract (EN): The present work aimed at evaluating whether solubility and peptide profile of dietary protein can affect survival and growth performance of common carp during early stages of life. Water-insoluble casein and two forms of soluble casein (non-hydrolysed and hydrolysed) were used as protein sources at different proportions in the experimental diets for first-feeding carp larvae. When provided as the only protein source water-insoluble casein led to high mortality and depressed growth after 21 days. The partial or total substitution of water-insoluble casein by soluble non-hydrolysed casein effectively improved survival and enhanced growth of larvae. An optimum level of soluble non-hydrolysed protein was found at 25% of total protein. The addition of some hydrolysed casein (25% of soluble protein) further improved results. However, high dietary levels of hydrolysed casein led to negative effects on larval performance, which would be related with a surplus of di-/tripeptides or/ and amino acids. Protein solubility appears to have only a temporary effect on larval performance, probably related with the ontogeny of the digestive tract, since about 2 weeks after the onset of exogenous feeding larvae became able to use efficiently water-insoluble protein. Results also suggest the need for a balance in the peptide profile to optimise the utilization of dietary protein by fish larvae.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15