Behavioral alterations in GH transgenic common carp may explain enhanced competitive feeding ability
Behavioral alterations in GH transgenic common carp may explain enhanced competitive feeding ability
复制标题
GH转基因鲤鱼的行为改变可能解释了竞争性摄食能力增强的原因
DOI：
10.1016/j.aquaculture.2011.04.013
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发表时间：
2011-07-04
期刊：
影响因子：
4.5
通讯作者：
Zhu, Zuoyan
中科院分区：
文献类型：
--
作者：
Duan, Ming;Zhang, Tanglin;Zhu, Zuoyan
本研究的目的是阐明生长激素转基因及其产生在鲤幼鱼社会交往中的作用。在连续提供食物颗粒的情况下，测定了14对“全鱼”GH转基因和非转基因鲤鱼的血清GH水平和行为影响。在3天的连续6次观察中，转基因鱼的运动水平和社会地位都有所提高，10分钟喂食前后2分钟的攻击性是非转基因鱼的2.69倍。转基因鱼消耗每个颗粒的可能性也超过1.74倍。在8 d的试验中，转基因鱼的体重特定生长率比非转基因鱼高4.09倍，血清生长激素水平比非转基因鱼高6.36倍。这些结果表明，GH转基因促进了GH的过度表达，改变了幼鱼的行为，从而提高了幼鱼的竞争能力和获取食物资源的能力，可能是为了满足更高的内在生长速率，这为GH诱导转基因鲤鱼的取食竞争能力的提高提供了直接证据。了解这些关系不仅有助于评估转基因鱼逃逸/释放的潜在生态效应，而且有助于利用该生长增强菌株的潜在水产养殖。(C) 2011 Elsevier B.V.版权所有
The aim of the present study was to clarify the role of GH transgenesis and its production in social interactions in juvenile common carp Cyprinus carpi. With food pellets provided sequentially, the serum GH levels and behavioral effects were measured in 14 pairs of size-matched 'all-fish' GH-transgenic and non-transgenic common carp. In six consecutive observations during 3 days, transgenic fish had a higher movement level as well as a higher social status, being 2.69 times as aggressive, two minutes before and after the 10-min feeding session compared to non-transgenic fish. Transgenic fish also were more than 1.74 times as likely to consume each pellet. During the 8-day experiment, transgenic fish had 4.09 times higher specific growth rate in body weight as well as 6.36 times higher serum GH level than the non-transgenic fish. These results show that GH transgenesis promotes over-expression of GH and alters behaviors in juvenile common carp, thereby increasing their ability to compete and gain food resources, presumably to meet a higher intrinsic growth rate, which gives direct evidence for the GH-induced elevation in feeding competitive ability of GH-transgenic common carp. Understanding these relationships would not only help evaluating potential ecological effects of the escaped/released transgenic fishes, but also help using potential aquaculture of this growth-enhanced strain. (C) 2011 Elsevier B.V. All rights reserved.