Influence of fasting on muscle composition and antioxidant defenses of market-size Sparus macrocephalus |
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Authors: | Zhang Xiao-dong Wu Tian-xing Cai Li-sheng and Zhu Yong-fei |
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Institution: | (1) School of Animal Sciences, Zhejiang University, Hangzhou, 310027, China;(2) Department of Chemistry, Zhejiang University, Hangzhou, 310027, China;(3) Key Laboratory for Molecular Design and Nutrition Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China |
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Abstract: | The study was conducted to investigate fasting effects on flesh composition and antioxidant defenses of market-size Sparus macrocephalus. Two hundred fish (main initial weight 580 g) were divided into two groups (control and fasted) and reared in 6 cages. After
two weeks of adaptation, group I fasted for 28 d; group II was fed normally as a control. In 3, 7, 14, 21 and 28 d, 6 fish
per group were sampled for proximate flesh composition, liver antioxidant enzyme activities and malondialdehyde flesh content
analyses. In fasted fish, the reduction of lipid content in muscle occurred after day 3, and, compared to controls, the content
of protein decreased from day 14, the activities of liver antioxidative enzymes superoxide dismutase (SOD) and glutathione
peroxidase (GPX) increased from day 3, and flesh malondialdehyde levels increased from day 21. Flesh fat reduction shows that
fasting may be used as a technique to reduce flesh lipid content in Sparus macrocephalus. However, considering flesh protein loss and the subsequent oxidative stress, the fasting technique should be used with precautions.
Project (No. 2006C12098) supported by the Science and Technology Department of Zhejiang Province, China |
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Keywords: | Antioxidant defenses Fasting Muscle composition Sparus macrocephalus |
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