High-energy diets for white sturgeon, Acipenser transmontanus Richardson |
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| Authors: | S S O Hung T Storebakken Y Cui L Tian & O Einen |
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| Institution: | Department of Animal Science, University of California, Davis, CA, USA,;AKVAFORSK, Institute of Aquaculture Research, AS, Sunndalsøra, Norway,;Institute of Hydrobiology, Academia Sinica, Wuhan, China,;Department of Biology, Zhongshan University, Guangzhou, China,;AKVAFORSK, Institute of Aquaculture Research, AS, Ås, Norway |
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| Abstract: | Four diets formulated for salmon were fed to 0.11 kg white sturgeon, Acipenser transmontanus Richardson, for 8 weeks. Dietary compositions ranged from 258 to 402 g lipid kg?1, 535–378 g protein kg?1 and 22.7–14.4 g protein MJ?1 gross energy.
Fish in all treatments grew rapidly, utilized the diets efficiently and had body compositions similar to what has been found in previous studies, but there were some dietary effects. Sturgeon fed the diet with the highest lipid content and lowest protein/energy ratio had lower ( P < 0.05) specific growth rate, feed efficiency, and liver moisture and protein contents, and 6-phosphogluconate dehydrogenase activity, but higher liver lipid contents than fish fed the other three diets. Condition factor, organ to body weight ratios, whole-body and plasma concentrations of protein, glucose and triglyceride, and liver glucose-6-phosphate dehydrogenase, isocitrate dehydrogenase and malic enzyme activities did not differ significantly among dietary treatments. This suggests that white sturgeon subyearlings can utilize diets with high lipid contents (258–357 g kg?1) to display good growth without major adverse effects on body composition and liver lipogenic enzyme activities. |
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| Keywords: | growth high-energy diet white sturgeon |
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