Rapid growth cost in "all-fish" growth hormone gene trainsgenic carp: Reduced critical swimming speed
Rapid growth cost in "all-fish" growth hormone gene trainsgenic carp: Reduced critical swimming speed
复制标题
DOI：
10.1007/s11434-007-0217-x
复制
发表时间：
2007-06-01
影响因子：
--
通讯作者：
Zhu ZuoYan
中科院分区：
文献类型：
--
作者：
Li DeLiang;Fu CuiZhang;Zhu ZuoYan
越来越多的证据表明，与快速增长相关的收益和成本之间存在权衡。增长率和临界之间的权衡。游泳速度（U-crit）在硬骨鱼中也很常见。我们推测，“全鱼”生长激素基因转基因鲤鱼（Cyprinus carpio L.） F-3代生长加速会降低其游泳能力。比较了转基因鱼和非转基因鱼的生长和游泳性能。结果表明，转基因鱼的平均体重是对照的1.4 ~ 1.9倍，平均特定生长率（SGR）比对照提高6% ~ 10%。转基因鱼的平均绝对U-crit （cm/s）值比对照低22%，平均相对U-crit （BL/s）值比对照低24%。这表明快速生长的“全鱼”转基因gh鲤鱼游泳能力较差。研究还支持生长速度和游泳成绩之间存在权衡关系，即生长快的个体的临界游泳速度较低。
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.