Requirements for n-3 highly unsaturated fatty acids in feeding juvenile Iranian sturgeon (<Emphasis Type="Italic">Acipenser persicus</Emphasis>) and its effects on growth,carcass quality,and fatty acid composition |
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Authors: | Mohamad Reza Imanpoor Masoud Asghari Reza Asadi |
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Institution: | (1) Fisheries Department, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran |
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Abstract: | A 60-day feeding experiment was carried out on juvenile Iranian sturgeon (Acipenser persicus) to evaluate the effects of different percentages of canola oil and fish oil containing n-3 highly unsaturated fatty acids
(n-3 HUFA) on fish growth and fatty acid composition. The requirement for n-3 HUFA of juvenile Iranian sturgeon (48.4 ± 1.98 g)
was studied by feeding the fish with various diets containing six different percentage of n-3 HUFA ranging from 1.56 to 17.25
(% of total fatty acids). Neither the weight gain, feed conversion ratio, condition factor, specific growth rate nor the protein
efficiency ratio showed any significant differences between the dietary treatments nor in the body composition of juvenile
Iranian sturgeon (P > 0.05); also there were no significant difference with respect to the effect of the dietary treatment (P > 0.05) on the blood parameters, for the content of plasma protein, glucose, cholesterol, and triglyceride. The fatty acid
composition of the carcass of the Iranian sturgeon fed with the diets containing various levels of n-3 HUFA was reflected
by the dietary fatty acid composition. The content of n-3 HUFA in the fish increased with an increase in dietary n-3 HUFA
levels. The results indicate that the dietary n-3 HUFA had no effect on the growth of juvenile Iranian sturgeon. |
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