| Rapid growth cost in “all-fish” growth hormone gene transgenic carp:Reduced critical swimming speed |
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| 作者姓名： | LI DeLiang FU CuiZhang HU Wei ZHONG Shan WANG YaPing & ZHU ZuoYan State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan China Graduate University of Chinese Academy of Sciences Beijing China |
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| 作者单位： | LI DeLiang1，2，FU CuiZhang1，HU Wei1，ZHONG Shan1，3，WANG YaPing1 & ZHU ZuoYan1 1 State Key Laboratory of Freshwater Ecology and Biotechnology，Institute of Hydrobiology，Chinese Academy of Sciences，Wuhan 430072，China; 2 Graduate University of Chinese Academy of Sciences，Beijing 100049，China; 3 Department of Genetics，Basic Medical School of Wuhan University，Wuhan 430071，China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos. 30400056 and 30130050)，the Development Plan of the State Key Fundamental Research of China (Grant No. 2001CB109006)，the ‘863’ High Technology Project (Grant No. 2004AA213120) |
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| 摘 要： | Evidence has accumulated that there is a trade-off between benefits and costs associated with rapid growth. A trade-off between growth rates and critical swimming speed (Ucrit) had been also reported to be common in teleost fish. We hypothesize that growth acceleration in the F3 generation of "all-fish" growth hormone gene (GH) transgenic common carp (Cyprinus carpio L.) would reduce the swimming abilities. Growth and swimming performance between transgenic fish and non-transgenic controls were compared. The results showed that transgenic fish had a mean body weight 1.4―1.9-fold heavier,and a mean specific growth rate (SGR) value 6%―10% higher than the controls. Transgenic fish,however,had a mean absolute Ucrit (cm/s) value 22% or mean relative Ucrit (BL/s) value 24% lower than the controls. It suggested that fast-growing "all-fish" GH-transgenic carp were inferior swimmers. It is also supported that there was a trade-off between growth rates and swimming performance,i.e. faster-growing individuals had lower critical swimming speed.
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