在两动物中发生交配后的离合器盗版
David R Vieites1, Sandra Nieto-Román, Marta Barluenga
1Laboratorio de Anatomía Animal, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias Biolóxicas, Universidade de Vigo, Buzón 137, 36201 Vigo, Spain. vieites@berkeley.edu
Nature
|September 17, 2004
概括
结合海盗是一种新型的常见青 (Rana temporaria) 的繁殖行为,允许雄性受精来自其他对的卵. 这一策略有利于海盗男性和女性,可能减少性选择的影响.
科学领域:
- * 生殖生物学 生殖生物学
- * * 伦理学 伦理学
- * 进化生态学 进化生态学
背景情况:
- *女性多种交配和替代性交配系统可以减少性选择的机会.
- * 精子竞争和替代生殖系统在外部肥料中很常见.
- * 两动物和鱼类没有复杂的交配行为时会出现多重父权.
研究的目的:
- * 报告和描述常见青 (Rana temporaria) 的山地种群中的离合式盗版.
- * 调查这种新型的生殖行为在有外部受精的脊椎动物中的流行率和健康后果.
- * 探索替代性交配策略,如离合式盗版,如何影响性选择强度.
主要方法:
- *观察Rana temporaria山地种群的繁殖行为.
- *识别和描述"离合式盗版",即雄性从新产的离合体中受精卵.
- * 评估受盗版影响的离合器比例和对受精成功的影响.
主要成果:
- *在84%的离合器中观察到离合器盗版,这是以前在外受精的脊椎动物中未知的行为.
- *海盗雄性在子中受精卵,增加了一些对的受精成功.
- *这种行为并不取决于大小,有些雄性在同一季节同时进行交配和海盗活动.
结论:
- * 在Rana temporaria的离合式海盗活动为海盗男性和女性提供了直接的健身好处.
- *这种替代性交配策略可能会减轻强烈的性别选择的影响,这可能是由男性偏向的性别比率驱动的.
- *普通青作为研究替代交配策略和性选择之间的相互作用的模型系统.
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