在混合交配系统的鱼类中,年龄依赖性吸引力的遗传变异
Jefferson O Guerra1, Merrit C Newton1,2, Cassandra S Nicotera1
1Department of Biology, Sewanee: The University of the South, Sewanee, TN, USA.
Biology letters
|January 22, 2025
概括
男鱼选择伴侣不仅仅是基于年龄. 在红树林河流中,男性对年轻或年长的雌雄性动物的偏好取决于遗传血统,揭示了复杂的基因型×年龄相互作用在生殖决策中.
科学领域:
- 进化生物学 进化生物学
- 生殖生物学 生殖生物学
- 行为生态学 行为生态学
背景情况:
- 生殖衰老,即随着年龄的增长生育能力的下降,在许多物种的雌性中很常见.
- 了解年龄依赖的线索对于男性来说至关重要,以做出最佳的伴侣选择决定.
- 类红树林河 (Kryptolebias marmoratus) 提供了一个独特的模型,其中包括自我受精的雌雄性和罕见的雄性.
研究的目的:
- 为了研究Kryptolebias marmoratus hermaphrodites的生殖衰老. 为了研究Kryptolebias marmoratus hermaphrodites的生殖衰老.
- 为了检查Kryptolebias marmoratus的雄性如何根据伴侣年龄做出伴侣选择的决定.
- 为了确定男性偏好是否受到雌雄的遗传血统的影响.
主要方法:
- 通过测量衰老的双性恋动物的生育能力下降来评估生殖衰老.
- 在基因相同的老年和年轻的双性恋动物之间进行的同时选择试验中观察到男性伴侣选择行为.
- 分析了基因血统和年龄对男性伴侣偏好的相互作用.
主要成果:
- 雌雄性动物的生育能力随着年龄的增长显著下降,在遗传谱系中存在差异.
- 男人并不普遍喜欢年轻的双性恋动物;根据遗传血统,偏好有很大的不同.
- 观察到一种强烈的基因型×年龄相互作用,吸引力取决于伴侣的年龄和遗传背景.
结论:
- 在Kryptolebias marmoratus中,男性伴侣的选择受到伴侣的遗传血统和年龄之间的复杂相互作用的影响.
- 雄性可以评估遗传变异的吸引力跨越一个雌性生殖的生殖寿命.
- 为了充分了解这些男性偏好,需要进一步研究伴生体活力和跨遗传系的交叉.
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