1. Rapid growth cost in 'all-fish' growth hormone gene transgenic carp: Reduced critical swimming speed
- Author
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Zhong Shan, Wang Yaping, LI DeLiang, Zhu Zuoyan, Hu Wei, and FU CuiZhang
- Subjects
Fishery ,Common carp ,Swimming speed ,Multidisciplinary ,Animal science ,biology ,Transgene ,Carp ,biology.organism_classification ,Growth hormone ,Gene ,Hormone ,Cyprinus - Abstract
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 (U-crit) had been also reported to be common in teleost fish. We hypothesize that growth acceleration in the F-3 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 U-crit (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.
- Published
- 2007