Breeding Suppression in Voles under Predation Risk of Small Mustelids: Laboratory or Methodological Artifact?
Breeding Suppression in Voles under Predation Risk of Small Mustelids: Laboratory or Methodological Artifact?
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DOI：
10.2307/3546977
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发表时间：
1998-06
期刊：
影响因子：
3.4
通讯作者：
T. Mappes;E. Koskela;H. Ylönen
中科院分区：
文献类型：
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作者：
T. Mappes;E. Koskela;H. Ylönen
许多被捕食动物都有生活史策略，这些策略似乎是为了避免专业捕食者的捕食而进化的。在过去的几年里。田鼠繁殖抑制（BSH）的假说是为了避免小型鼬科动物捕食而进行的一种适应，这引发了一些实证和理论研究。然而，这些研究中实证工作的有效性以及结论的合理性受到了批评。在这里，我们报告了一项实验的结果，其中我们研究了银行田鼠 Clethrionomvs glareolus 的繁殖抑制。在四个复制的外壳中。我们发现模拟最小黄鼠狼（Mustela nivalis nivalis）的捕食风险对雌性田鼠的繁殖产出没有影响。与早期的实验室研究相比，实验后治疗组之间女性的体重没有差异。我们根据这些结果和对博西家电的批评重新分析了早期实验室研究的结果。目前没有直接证据表明田鼠在野外种群中繁殖受到抑制。此外，BSH 的基本假设尚未经过实验测试。因此，对繁殖抑制最简单的解释是，它可能是方法论或实验室的产物。
Many prey animals have life-history strategies that seem to have evolved to avoid predation from specialist predators. During the past few years. the hypothesis of breeding suppression (BSH) of voles as an adaptation to avoid small mustelid predation has prompted several empirical and theoretical studies. However, the validity of empirical work as well as justification of the conclusions in these studies have been criticised. Here we report results of an experiment in which we studied the breeding suppression of bank voles, Clethrionomvs glareolus. in four replicated enclosures. We found no effects of simulated least weasel, Mustela nivalis nivalis, predation risk on the reproductive output of female voles. In contrast to earlier laboratory studies, the weights of females did not differ between treatment groups after the experiment. We reanalysed results of our earlier laboratory studies in light of these results and criticism of the BSH. At present there is no direct evidence for brecding suppression of voles in field populations. Furthermore, the underlying assumptions of the BSH have not been tested experimentally. Thus the most parsimonious explanation for breeding suppression is that it may be a methodological or laboratory artifact.