The Effects of Replacing Fish Oil with Vegetable Oils in Starter Feeds on the Liver Fat Composition of Sea Bass (Dicentrarchus labrax L., 1758)

Authors : Mustafa YILDIZ, Erdal ŞENER

Pages : 709-717

View : 8 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The effects of replacing fish oil with soybean oil, sunflower oil, corn oil and olive oil in starter feeds on the vicerosomatic index, hepatosomatic index and liver fatty acid composition of the sea bass were studied. Juvenile sea bass insert ignore into journalissuearticles values(initial weight = 7.58 ± 0.13 g); were fed experimental diets for 75 days. The fish were then killed and liver samples were collected. The lowest total crude fat value insert ignore into journalissuearticles values(17.61%); was found in the fish fed the fish oil diet. The highest total crude fat value insert ignore into journalissuearticles values(34.30%); was found in the fish fed the olive oil diet insert ignore into journalissuearticles values(P < 0.05);. Similarly, the fish fed the fish oil diet had the lowest hepatosomatic index value insert ignore into journalissuearticles values(2.08); and all the fish fed vegetable oils had similarly high hepatosomatic index values insert ignore into journalissuearticles values(P < 0.05);. Likewise, vicerosomatic index values were lowest insert ignore into journalissuearticles values(9.06%); in the fish fed fish oil and highest in the fish fed soybean and other vegetable oils insert ignore into journalissuearticles values(P < 0.05);. Fatty acid analyses showed that EPA and DHA from n-3 HUFA`s in the fish fed the fish oil diet, linolenic acid insert ignore into journalissuearticles values(18:3n-3); and linoleic acid insert ignore into journalissuearticles values(18:2n-6); in the fish fed the soybean oil diet and oleic acid insert ignore into journalissuearticles values(18:1n-9); in the fish fed the olive oil diet were higher than in the fish fed the other diets.
Keywords : Sea Bass, Dicentrarchus labrax, nutrition, fish oil, vegetable oils, liver, fatty acids