气候变化领域集成服务门户(CCPortal): Fertilization mode drives sperm length evolution across the animal tree of life

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DOI	10.1038/s41559-021-01488-y
	Fertilization mode drives sperm length evolution across the animal tree of life
	Kahrl A.F.; Snook R.R.; Fitzpatrick J.L.
发表日期	2021
ISSN	2397-334X
起始页码	1153
结束页码	1164
卷号	5 期号:8
英文摘要	Evolutionary biologists have endeavoured to explain the extraordinary diversity of sperm morphology across animals for more than a century. One hypothesis to explain sperm diversity is that sperm length is shaped by the environment where fertilization takes place (that is, fertilization mode). Evolutionary transitions in fertilization modes may transform how selection acts on sperm length, probably by affecting postcopulatory mechanisms of sperm competition and the scope for cryptic female choice. Here, we address this hypothesis by generating a macro-evolutionary view of how fertilization mode (including external fertilizers, internal fertilizers and spermcasters) influences sperm length diversification among 3,233 species from 21 animal phyla. We show that sperm are shorter in species whose sperm are diluted in aquatic environments (that is, external fertilizers and spermcasters) and longer in species where sperm are directly transferred to females (that is, internal fertilizers). We also show that sperm length evolves faster and with a greater number of adaptive shifts in species where sperm operate within females (for example, spermcasters and internal fertilizers). Our results demonstrate that fertilization mode is a key driver in the evolution of sperm length across animals, and we argue that a complex combination of postcopulatory forces has shaped sperm length diversification throughout animal evolution. ? 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	animal; female; fertilization; male; spermatozoon; Animals; Female; Fertilization; Male; Spermatozoa
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256893
作者单位	Department of Zoology, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	Kahrl A.F.,Snook R.R.,Fitzpatrick J.L.. Fertilization mode drives sperm length evolution across the animal tree of life[J],2021,5(8).
APA	Kahrl A.F.,Snook R.R.,&Fitzpatrick J.L..(2021).Fertilization mode drives sperm length evolution across the animal tree of life.Nature Ecology & Evolution,5(8).
MLA	Kahrl A.F.,et al."Fertilization mode drives sperm length evolution across the animal tree of life".Nature Ecology & Evolution 5.8(2021).