Same-sex sexual behaviour and mistaken identity in male field crickets, Teleogryllus oceanicus
Same-sex sexual behaviour and mistaken identity in male field crickets, Teleogryllus oceanicus
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DOI：
10.1016/j.anbehav.2012.08.001
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发表时间：
2012-10-01
期刊：
影响因子：
2.5
通讯作者：
French, Nicholas
中科院分区：
文献类型：
--
作者：
Bailey, Nathan W.;French, Nicholas
人们提出了各种适应性和非适应性假设来解释动物同性性行为（SSB）的维持。适应性假设在昆虫系统中获得的支持有限，并且 SSB 表达背后的行为机制尚不清楚。一个经常被提出的机制是，昆虫中的 SSB 是由于错误的身份而发生的。我们使用田间蟋蟀（Teleogryllus oceanicus）来评估雄性 SSB 存在的适应性假设，然后剖析其近端行为起源。我们测试了男性 SSB 是否减轻了性内攻击的成本或促进了社会统治地位的建立。我们没有发现任何支持这些适应性假设的证据。然而，男性经历的社会环境调节了他们的 SSB 表达。与经历过另一位男性或没有社交接触的男性相比，最近在其社交环境中与女性有过接触经历的男性在随后与男性接触时发生 SSB 的可能性要高出三到八倍。我们的研究结果提供了证据，表明大洋鲀中雄性SSB的出现是由于性别歧视减弱而导致的错误身份的结果，当人们认为雌性可以交配时，它们强调了行为可塑性在SSB表达中的关键作用。 (C) 2012 年动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
A variety of adaptive and nonadaptive hypotheses have been proposed to explain the maintenance of same-sex sexual behaviour (SSB) in animals. Adaptive hypotheses have gained limited support in insect systems, and the behavioural mechanisms underlying the expression of SSB are not well understood. A frequently suggested mechanism is that SSB in insects occurs as a result of mistaken identity. We used the field cricket, Teleogryllus oceanicus, to evaluate adaptive hypotheses for the existence of male SSB and then dissect its proximate behavioural origins. We tested whether male SSB mitigates the costs of intrasexual aggression or facilitates the establishment of social dominance. We found no support for either of these adaptive hypotheses. However, the social environment males experienced modulated their expression of SSB. Males with recent experience of females in their social environment were between three and eight times more likely to engage in SSB in subsequent encounters with males, compared to males that experienced either another male or no social contact. Our results provide evidence that male SSB in T. oceanicus arises as a result of mistaken identity driven by weakened sex discrimination when there is a perception of females available for mating, and they highlight a pivotal role for behavioural plasticity in the expression of SSB. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.