Research Highlights: Lipid Technology 5-6/2009

✍ Scribed by Frank D. Gunstone

• Publisher: Wiley (John Wiley & Sons)
• Year: 2009
• Tongue: English
• Weight: 230 KB
• Volume: 21
• Category: Article
• ISSN: 0956-666X
• DOI: 10.1002/lite.200900026

✦ Synopsis

Fish oil replacement in finfish nutrition

With the growing importance of farmed fish there is increasing concern about the supply of aquafood containing non-sustainable supplies of fish oil rich in LC-PUFA. The main body of the review discusses the effect of fish oil replacement on feed quality, fish performance and feed efficiency, lipid metabolism, and final eating quality of farmed fish. There is also an account of the possible replacement feeds (vegetable fats, animal fats, aquatic by-products, and new LC-PUFA sources) and of economic and ethical issues. Finally there is a discussion of the effect of fish oil replacement on fish growth and on fish fatty acid composition. It is concluded that potential substitutes for fish oil should be readily available, competitively priced, and have a low level of linoleic acid which is considered to be the most detrimental fatty acid from a nutritional and sensorial viewpoint. Preference should therefore be given to oils rich in saturated and/or monounsaturated acids such as palm oil, coconut oil, tallow, and lard. Oils such as soybean, sunflower, cottonseed, and poultry by-products should be avoided because of their high linoleic content.