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首页> 外文期刊>Ethology >No Inbreeding Avoidance by Female Burying Beetles Regardless of Whether They Encounter Males Simultaneously or Sequentially
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No Inbreeding Avoidance by Female Burying Beetles Regardless of Whether They Encounter Males Simultaneously or Sequentially

机译：雌性甲虫无论是同时还是相继遇到雄性，都无法避免近亲繁殖。

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摘要

Inbreeding avoidance reduces the probability that an individual will mate with a related partner, thereby lowering the risk that it produces inbred offspring suffering from inbreeding depression. Inbreeding avoidance can occur through several mechanisms, including active mate choice, polyandry and sex-biased dispersal. Here, we focus on the role of active mate choice as a mechanism for inbreeding avoidance. Recent evidence suggests that the experimental design used in mate choice experiments (i.e. simultaneous versus sequential choice) can have a strong impact on the strength of the reported mating preferences. In this study, we examine whether similar effects of experimental design also apply in the context of inbreeding avoidance. To this end, we designed two experiments on the burying beetle Nicrophorus vespilloides that matched two different contexts under which females encounter potential mates in the wild; that is, when females encounter males simultaneously and sequentially. We found that females were as likely to mate with related and unrelated males regardless of whether they encountered male partners simultaneously or sequentially. Thus, our study provides no evidence for inbreeding avoidance in this species, and suggests that the number of mates present did not influence the degree of inbreeding avoidance. We discuss potential explanations for the lack of inbreeding avoidance through mate choice, including lack of mechanisms for recognizing close relatives, low costs and/or low risks of inbreeding and the presence of other inbreeding avoidance mechanisms, such as sex-biased dispersal and polyandry coupled with post-copulatory mate choice.
机译：避免近交会降低个体与相关伴侣交配的可能性，从而降低其产生近交后代抑郁症的近交后代的风险。避免近交可以通过多种机制来进行，包括主动选择配偶，一夫多妻制和偏向性别的分散。在这里，我们着重介绍主动配偶选择作为避免近交的机制的作用。最近的证据表明，在配偶选择实验中使用的实验设计（即同时选择还是顺序选择）会对报告的交配偏好的强度产生重大影响。在这项研究中，我们研究了在近交避免的背景下实验设计的类似效果是否也适用。为此，我们针对掩埋甲虫Nicrophorus vespilloides设计了两个实验，这些实验与两种不同的情况相匹配，在这种情况下，雌性在野外遇到潜在的配偶。也就是说，当女性同时和相继遇到男性时。我们发现雌性与有亲属和无亲属的男性交配的可能性很高，无论他们是同时遇到男性伴侣还是先后遇到男性伴侣。因此，我们的研究没有提供该物种近交回避的证据，并且表明存在的配偶数量不会影响近交回避的程度。我们讨论了通过配偶选择缺乏近亲回避的潜在解释，包括缺乏识别近亲的机制，成本低和/或近交风险低以及其他近亲回避机制的存在，例如性别偏见的散布和一妻多夫制选择交配后的伴侣。

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