Same-sex sexual behaviour and selection for indiscriminate mating
Same-sex sexual behaviour and selection for indiscriminate mating
复制标题
DOI：
10.1038/s41559-020-01331-w
复制
发表时间：
2020-11-09
影响因子：
16.8
通讯作者：
Servedio, Maria R.
中科院分区：
文献类型：
--
作者：
Lerch, Brian A.;Servedio, Maria R.
长期以来，同性性行为（SSB）的广泛存在一直被认为是一个进化难题，因为SSB的参与者在花费时间和精力寻找伴侣后，遭受了无法繁殖的代价。SSB作为最佳策略的一部分发生的可能性受到的关注较少，尽管不分青红皂白的性行为可能是有性生殖的祖先模式。在这里，我们建立了一个简单的有性生殖模型，并为不分青红皂白的性行为的进化建立了一个理论框架。我们提供了强有力的支持的假设，SSB可以保持选择不分青红皂白的性行为，通过显示，不分青红皂白的交配是在广泛的条件下的最佳策略。此外，我们的模型表明，最强烈地支持不分青红皂白的交配的条件可能存在于性行为的起源。这些发现不仅对SSB的进化起源有影响，而且对整个动物王国的歧视性性行为的进化也有影响。
The widespread presence of same-sex sexual behaviour (SSB) has long been thought to pose an evolutionary conundrum, as participants in SSB suffer the cost of failing to reproduce after expending the time and energy to find a mate. The potential for SSB to occur as part of an optimal strategy has received less attention, although indiscriminate sexual behaviour may be the ancestral mode of sexual reproduction. Here, we build a simple model of sexual reproduction and create a theoretical framework for the evolution of indiscriminate sexual behaviour. We provide strong support for the hypothesis that SSB can be maintained by selection for indiscriminate sexual behaviour, by showing that indiscriminate mating is the optimal strategy under a wide range of conditions. Further, our model suggests that the conditions that most strongly favour indiscriminate mating were probably present at the origin of sexual behaviour. These findings have implications not only for the evolutionary origins of SSB, but also for the evolution of discriminate sexual behaviour across the animal kingdom.