Affordable Access

deepdyve-link
Publisher Website

n-3 Canola oil effectively replaces fish oil as a new safe dietary source of DHA in feed for juvenile Atlantic salmon.

Authors
  • Ruyter, Bente1
  • Sissener, Nini H2
  • Østbye, Tone-Kari1
  • Simon, Cedric J3
  • Krasnov, Aleksei1
  • Bou, Marta1
  • Sanden, Monica2
  • Nichols, Peter D4
  • Lutfi, Esmail1
  • Berge, Gerd M1
  • 1 Nofima (Norwegian Institute of Food, Fisheries and Aquaculture Research), 1432 Ås, Norway. , (Norway)
  • 2 Institute of Marine Research, 5817 Bergen, Norway. , (Norway)
  • 3 CSIRO Agriculture and Food, QLD Biosciences Precinct, St Lucia, QLD 4067, Australia. , (Australia)
  • 4 CSIRO Oceans and Atmosphere, Hobart, TAS 7000, Australia. , (Australia)
Type
Published Article
Journal
British Journal Of Nutrition
Publisher
Cambridge University Press
Publication Date
Dec 28, 2019
Volume
122
Issue
12
Pages
1329–1345
Identifiers
DOI: 10.1017/S0007114519002356
PMID: 31506120
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Limited availability of fish oils (FO), rich in n-3 long-chain (≥C20) PUFA, is a major constraint for further growth of the aquaculture industry. Long-chain n-3 rich oils from crops GM with algal genes are promising new sources for the industry. This project studied the use of a newly developed n-3 canola oil (DHA-CA) in diets of Atlantic salmon fingerlings in freshwater. The DHA-CA oil has high proportions of the n-3 fatty acids (FA) 18 : 3n-3 and DHA and lower proportions of n-6 FA than conventional plant oils. Levels of phytosterols, vitamin E and minerals in the DHA-CA were within the natural variation of commercial canola oils. Pesticides, mycotoxins, polyaromatic hydrocarbons and heavy metals were below lowest qualifiable concentration. Two feeding trials were conducted to evaluate effects of two dietary levels of DHA-CA compared with two dietary levels of FO at two water temperatures. Fish increased their weight approximately 20-fold at 16°C and 12-fold at 12°C during the experimental periods, with equal growth in salmon fed the FO diets compared with DHA-CA diets. Salmon fed DHA-CA diets had approximately the same EPA+DHA content in whole body as salmon fed FO diets. Gene expression, lipid composition and oxidative stress-related enzyme activities showed only minor differences between the dietary groups, and the effects were mostly a result of dietary oil level, rather than the oil source. The results demonstrated that DHA-CA is a safe and effective replacement for FO in diets of Atlantic salmon during the sensitive fingerling life-stage.

Report this publication

Statistics

Seen <100 times