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Assessing Differences in Sperm Competitive Ability in Drosophila
Published on: August 22, 2013
伴侣偏好的适应性可塑性与生殖努力的差异有关
A Qvarnström1, T Pärt, B C Sheldon
1Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Sweden. annaq@biomail.ucsd.edu
Nature
|June 1, 2000
概括
雌性领捕在伴侣偏好方面表现出适应性可塑性. 他们对男性额头贴片大小的偏好因季节而异,影响生殖成功和投资.
科学领域:
- 行为生态学 行为生态学
- 进化生物学 进化生物学
- 动物行为 动物行为
背景情况:
- 伴侣偏好在自然种群中得到了很好的记录.
- 伴侣偏好的种群内部变化往往被忽视,并被认为是不适应的.
研究的目的:
- 调查一个人群内伴侣偏好变化的适应意义.
- 为了确定环境因素是否影响领捕 (Ficedula albicollis) 的伴侣选择.
主要方法:
- 根据男性额头贴片大小对女性伴侣选择的实验操纵.
- 对伴侣偏好与繁殖时间和生殖成功的相关性分析.
- 评估与繁殖时间和男性表型相关的女性生殖力度 (离合体大小).
主要成果:
- 雌性领捕对雄性额头斑块大小的偏好因繁殖季节而有所不同.
- 只有晚期繁殖的雌性更喜欢拥有较大的额头斑块的雄性.
- 在晚期繁殖者中,观察到雄性补丁大小和雌性生殖成功之间的积极关系.
- 女性的生殖力度根据繁殖时间和男性特征进行了调整.
结论:
- 伴侣偏好可以在人群中表现出适应性可塑性.
- 这种可塑性与生殖成功和投资的季节性变化有关.
- 环境因素,如繁殖时间,可以塑造适应性伴侣选择.
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