An alternative hypothesis for the evolution of same-sex sexual behaviour in animals
An alternative hypothesis for the evolution of same-sex sexual behaviour in animals
复制标题
动物同性性行为进化的另一种假设
DOI：
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发表时间：
2019
影响因子：
16.8
通讯作者：
Caitlin E. McDonough
中科院分区：
文献类型：
--
作者：
Julia D. Monk;Erin Giglio;A. Kamath;M. Lambert;Caitlin E. McDonough
同性性行为（SSB）已在超过1,500种动物中记录，并广泛分布于大多数主要分支中。进化生物学家长期以来一直试图揭示“同性恋行为”的适应性起源，试图解决这个明显的达尔文悖论：SSB是如何反复进化和持续存在的，尽管它假定的健身成本？这个问题隐含的假设是，“异性恋”或排他性的异性性行为（DSB）是动物的基线条件，SSB是从那里进化而来的。我们质疑的想法，SSB必然提出了一个进化的难题，并建议文献包括未经检查的假设，成本，收益和SSB的起源。相反，我们为SSB的进化起源提供了一个替代的零假设，通过一个微妙的视角转变，远离SSB的起源和维持是一个需要解决的问题的期望。我们认为，DSB作为祖先的经常隐含的假设还没有得到严格的审查，而是假设一个祖先的条件下，不分青红皂白的性行为针对所有性别。通过改变我们研究动物性行为的透镜，我们可以更富有成效地考察各种性策略的进化历史。作者假设，这是一种针对所有性别的不分青红皂白的性行为的祖先状态，而不是一种以异性性行为为基线，同性性行为为异常的状态。
Same-sex sexual behaviour (SSB) has been recorded in over 1,500 animal species with a widespread distribution across most major clades. Evolutionary biologists have long sought to uncover the adaptive origins of ‘homosexual behaviour’ in an attempt to resolve this apparent Darwinian paradox: how has SSB repeatedly evolved and persisted despite its presumed fitness costs? This question implicitly assumes that ‘heterosexual’ or exclusive different-sex sexual behaviour (DSB) is the baseline condition for animals, from which SSB has evolved. We question the idea that SSB necessarily presents an evolutionary conundrum, and suggest that the literature includes unchecked assumptions regarding the costs, benefits and origins of SSB. Instead, we offer an alternative null hypothesis for the evolutionary origin of SSB that, through a subtle shift in perspective, moves away from the expectation that the origin and maintenance of SSB is a problem in need of a solution. We argue that the frequently implicit assumption of DSB as ancestral has not been rigorously examined, and instead hypothesize an ancestral condition of indiscriminate sexual behaviours directed towards all sexes. By shifting the lens through which we study animal sexual behaviour, we can more fruitfully examine the evolutionary history of diverse sexual strategies. The authors hypothesize an ancestral condition of indiscriminate sexual behaviours directed towards all sexes, rather than a state in which different-sex sexual behaviour is a baseline and same-sex sexual behaviour is anomalous.
昆虫模型的实验进化表明，男性同性恋行为的发生是由于不准确的择偶行为
影响因子：
2.5
作者：
Sales K
通讯作者：
Sales K