没有证据表明,在鱼和鱼群中,多一性对种群水平有好处
Joel H Gayford1,2, Estefanía M Flores-Flores2
1Department of Life Sciences, Imperial College London, London, United Kingdom.
PloS one
|September 4, 2024
概括
鱼和鱼 (Elasmobranchii) 的交配系统变化不会影响它们的种群状况或灭绝风险. 虽然一夫多妻制和多夫多妻制都作为适应性策略独立演变,但它们不会影响弹性枝种群的生存能力.
科学领域:
- 进化生物学 进化生物学
- 动物行为 动物行为
- 保护科学 保护科学
背景情况:
- 交配系统的变化,从基因一夫一妻制到多夫一夫制,显著影响动物的性冲突,选择和健康.
- 从理论上讲,交配系统可以影响种群的生存能力和灭绝风险,但经验证据仍然是混合的,通常需要实质性的环境变化.
- 鱼和鱼 (Elasmobranchii) 是一个独特的模型,因为它们的交配系统,种群状况和环境变化.
研究的目的:
- 为了研究交配系统 (一夫多妻制和多夫制) 与Elasmobranchii.种群状况之间的关系.
- 为了推断在弹性树枝交配系统的宏观进化变化,在整个他们的族系.
- 确定交配系统的变化是否影响鱼和鱼的种群生存能力和灭绝风险.
主要方法:
- 对整个Elasmobranchii的交配系统和种群状况进行了基因组学比较分析.
- 在基因一夫一妻制和多夫一妻制之间的进化过渡的重建.
- 统计评估交配系统类型与人口趋势之间的相关性.
主要成果:
- 基因一夫一妻制和多夫一夫制在Elasmobranchii中独立地多次演变.
- 这些不同的交配系统似乎是由于特定的生态和生物条件而受到青的替代适应策略.
- 没有发现有意义的证据将交配系统的变化与人口层面的后果或elasmobranchs的灭绝脆弱性联系起来.
结论:
- 弹性树枝的交配系统变化不太可能成为灭绝风险的主要驱动因素.
- 一夫一妻制和多夫一妻制的演变代表了对不同条件的适应性反应,而不是人口健康的指标.
- 需要进一步的研究,才能充分理解交配系统的进化动态及其在这个脊椎动物群中对人口水平的影响.
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