Parental investment and fecundity, but not brain size, are associated with establishment success in introduced fishes
Parental investment and fecundity, but not brain size, are associated with establishment success in introduced fishes
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DOI：
10.1111/j.1365-2435.2007.01318.x
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发表时间：
2007-10-01
影响因子：
5.2
通讯作者：
Drake, John M.
中科院分区：
文献类型：
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作者：
Drake, John M.
经典理论预测，定殖能力应随着繁殖力的增加而增加。此外，最近有研究表明，鸟类的成功建立与相对大脑大小相关，这被认为是脊椎动物中可能普遍存在的。我对全球鱼类引进的建立成功进行了比较研究，控制了区域地理差异，以测试这些假设的相关性。在17种鱼类的133次引进中，建立成功与繁殖力呈负相关，而没有证据表明大脑相对大小的影响。在部分重叠的数据分析，有39个物种的相对大脑大小和建立率之间的相关性没有证据，负相关与繁殖力的一个解释是，父母的投资可能是更重要的建立比繁殖力。在126个引进的14个物种，繁殖行为与父母的投资显着相关的建立成功。这些结果表明，大脑大小和建立成功之间的相关性并不普遍。
Classical theory predicts that colonizing ability should increase with fecundity. Additionally, it has recently been shown that successful establishment of birds was correlated with relative brain size, which was suggested as possibly universal among vertebrates.I conducted a comparative study of establishment success in global fish introductions, controlling for regional geographic differences, to test these hypothesized correlates.In 133 introductions of 17 fish species, establishment success was negatively associated with fecundity while there was no evidence for an effect of relative brain size. In analysis of partially overlapping data, there was no evidence of a correlation between relative brain size and establishment rate across 39 species.One explanation for the negative association with fecundity is that parental investment might be more important to establishment than fecundity. In 126 introductions of 14 species, reproductive behaviours associated with parental investment were significantly associated with establishment success. These results suggest that the correlation between brain size and establishment success is not universal.