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孕产妇的投资随着体型的增加和鱼和鱼的多样化率的提高而演变
Christopher G Mull1, Matthew W Pennell2, Kara E Yopak3
1Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada; Integrated Fisheries Lab, Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
Current biology : CB
|June 6, 2024
概括
在鱼,鱼和金像鱼中,活体携带进化了多次,显著增加了物种多样化率. 这种进化,特别是在更大的热带物种中,与息地殖民有关,而不是性选择.
科学领域:
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
- 鱼类学 鱼类学 鱼类学
背景情况:
- 在脊椎动物中,从产卵的祖先进化了150多次.
- 了解生殖多样性的驱动因素及其与物种多样化的联系至关重要.
- 鱼类 (鱼,鱼,鱼) 具有广泛的生殖和生态多样性,非常适合研究早期的脊椎动物生殖.
研究的目的:
- 为了重建 chondrichthyans 生殖模式的进化历史.
- 为了研究生育率和物种化率的演变之间的关系.
- 为了确定驱动软骨鱼类多样化的因素.
主要方法:
- 对610种孔德里希物种的家族遗传学分析,以重建生殖模式的进化.
- 对整个族系的繁殖策略 (产卵与生育,母体养) 的比较分析.
- 生殖模式转变,身体大小,息地和多样化速度之间的相关性分析.
主要成果:
- 产卵是氏体中祖先的生殖方式;活着的承受至少进化了七次.
- 母体养 (母体养) 进化至少有15次,其中有一次是逆转.
- 生产与多样化率几乎翻一番有关,特别是在更大,热带物种中,并与新息地殖民有关.
结论:
- 生产的进化,而不是母性化,是德里希提亚生物多样化的主要驱动力.
- 孔德里希提人中的多样化主要与息地殖民有关,不同于性选择是关键因素的远距离动物.
- 孔德里希类鱼类在分类后的生殖隔离进化速度可能较慢,这表明与其他鱼类群体相比,它们具有不同的多样化机制.
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