Absence of female conspecifics induces homosexual behaviour in male guppies
Absence of female conspecifics induces homosexual behaviour in male guppies
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DOI：
10.1016/j.anbehav.2003.12.022
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发表时间：
2004-12-01
期刊：
影响因子：
2.5
通讯作者：
Waite, TA
中科院分区：
文献类型：
--
作者：
Field, KL;Waite, TA
社会环境会对物种典型性行为的表达产生巨大影响。我们利用孔雀鱼（Poecilia reticulata）来探究全男性的社会环境如何影响男性的性行为。男性被分配到单一性别组或混合性别组。 15周后，他们的性行为在每种性别的三个新个体在场的情况下进行了分析。来自单一性别群体的雄性对刺激雄性的性表现和偷偷交配尝试的比率高于来自混合性别群体的雄性。来自混合性别群体的男性使用典型的异性恋行为将大部分性行为指向女性。然后将每个受试者的社会环境颠倒两周，之后两种治疗中的受试者都表现出更强的展示或偷偷接近男性的倾向。这些发现表明，当女性变得容易接近时，同性恋行为不会轻易消失，甚至在异性恋行为个体发生后也可能被诱导。虽然孔雀鱼在自然界中很少出现在全雄性群体中，但这些发现强调了社会环境塑造交配行为的能力，这对于行为研究或保护育种计划中使用的圈养种群尤其重要。 (C) 2004 年动物行为研究协会。 Elsevier Ltd. 保留所有权利。
Social environment can have dramatic effects on the expression of species-typical sexual behaviour. Using guppies, Poecilia reticulata, we asked how an all-male social environment affects male sexual behaviour. Males were assigned to either single-sex or mixed-sex groups. After 15 weeks, their sexual behaviour was assayed in the presence of three novel individuals of each sex. Males from single-sex groups performed higher rates of sexual displays and sneak copulation attempts towards stimulus males than did males from mixed-sex groups. Males from mixed-sex groups directed the majority of their sexual behaviour towards females using typical heterosexual behaviour. The social environment for each subject was then reversed for 2 weeks, after which subjects in both treatments showed a stronger tendency to display or sneak towards males. These findings reveal that homosexual behaviour is not readily extinguished when females become accessible and that it can be induced even after the ontogeny of heterosexual behaviour. While guppies may rarely occur in all-male groups in nature, these findings highlight the capacity for social environment to shape mating behaviour, which is particularly relevant for captive populations used in behavioural studies or conservation breeding programmes. (C) 2004 The Association for the Study of Animal Behaviour. Aiblisked by Elsevier Ltd. All rights reserved.