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Influence of fasting on muscle composition and antioxidant defenses of market-size sparus macrocephalus

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第12期8卷 906-911页

作者： ZHANG Xiao-dong WU Tian-xing CAI Li-sheng ZHU Yong-fei School of Animal Sciences Zhejiang University Hangzhou 310027 China Department of Chemistry Zhejiang University Hangzhou 310027 China Key Laboratory for Molecular Design and Nutrition Engineering Ningbo Institute of Technology Zhejiang University Ningbo 315100 China

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.

关键词： Antioxidant defenses Fasting Muscle composition sparus macrocephalus

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Effects of α-tocopheryl acetate supplementation in preslaughter diet on antioxidant enzyme activities and fillet quality of commercial-size sparus macrocephalus

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第9期8卷 680-685页

This study examined the effects of dietary α-tocopheryl acetate supplementation on antioxidant enzyme activities and fillet quality in commercial-size sparus macrocephalus. Three hundred fish [main initial weight （350±12） g] were divided into three groups （E250, E500 and El000） and reared in 9 cages. The fish were fed for 8 weeks with three diets containing different levels of dietary α-tocopheryl acetate （289, 553, 1069 mg/kg）. Over the experimental period, fish were fed to satiation and reached a final mean weight of （465±28） g without significant body weight difference and proximate composition difference. Fillet α-tocopherol was significantly （P〈0.05） different between groups, reaching levels of 14.2, 22.1, 30.9 pg/mg fillet for groups E250, E500 and El000, respectively. Total serum superoxide dismutase （SOD） activity increased significantly （P〈0.05） in fish fed the diets high in α-tocopheryl acetate, but serum glutathione peroxidase （GPX） activity was unaffected. In storage on ice, fillets of fish fed the diets high in α-tocopheryl acetate exhibited significantly lower （P〈0.05） levels of oxidation. These results suggested that increased dietary α-tocopheryl acetate could increase its flesh deposition, increase the activity of SOD and prevent lipid peroxidation ofsparus macrocephalus fillets in retail storage on ice.

关键词： Fillet quality Lipid peroxidation sparus macrocephalus α-Tocopherol

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Effectiveness of stocking sparus macrocephalus fry in situ in the East China Sea

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Aquaculture and Fisheries 2019年第2期4卷 74-79页

作者： Qingsong Hu Ning Bao Hafiz Abdur Rahman Yazhou Jiang Shouyu Zhang Jun Li Jikang Shentu College of Engineering and Technology Shanghai Ocean UniversityShanghai201306China East China Sea Fisheries Research Institute Shanghai200090China College of Ecology and Environment Shanghai Ocean UniversityShanghai201306China Ningbo Ocean and Fishery Research Institute Ningbo315103China

The sea area surrounding Baishishan Island has abundant fishery resources because of its plentiful food and rocky reefs that provide refuge from ***,overfishing has occurred in many areas and some species’local populations need to be replenished through stocking *** case study,using sparus microcephalus as the test species,designed and analyzed detailed stocking strategies to improve the survival ratio and control the active range of the released *** variables included release location,release time,and tidal *** stocking strategies were designed,executed,and evaluated for comparison.A traditional stocking method was applied to the high flow area of Baishishan Island in Xiangshan Bay,East China *** released fry were transported by boat and released to the sea using *** fish were traced using plastic *** average distance of the 19 recaptured fry from the release point was 7.6 km with 52.9%mortality *** distance at recapture and mortality rate among recaptured individuals showed that the traditional releasing method was not *** in situ stocking method was used in a low tide area and natural process was imitated to decrease the stress response and promote physiological *** purpose of this method was to prolong the release process applying temporary net cages at the release location,which resulted in a regional distribution of the released fish and possibly improving the food availability.A new Sr+tagging technique was adopted to evaluate the release effect and quantify comparative release *** 1 fish among the 354 caught was found farther than 1 km from the release point in the following 6 *** results validated the promotion of the new stocking technique.

关键词： Baishishan island sparus macrocephalus Sr+tagging technique In situ release Survival rate

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