气候变化领域集成服务门户(CCPortal): Diminishing returns drive altruists to help extended family

CCPortal

DOI	10.1038/s41559-020-01382-z
	Diminishing returns drive altruists to help extended family
	Kennedy P.; Sumner S.; Botha P.; Welton N.J.; Higginson A.D.; Radford A.N.
发表日期	2021
ISSN	2397-334X
起始页码	468
结束页码	479
卷号	5 期号:4
英文摘要	Altruism between close relatives can be easily explained. However, paradoxes arise when organisms divert altruism towards more distantly related recipients. In some social insects, workers drift extensively between colonies and help raise less related foreign brood, seemingly reducing inclusive fitness. Since being highlighted by W. D. Hamilton, three hypotheses (bet hedging, indirect reciprocity and diminishing returns to cooperation) have been proposed for this surprising behaviour. Here, using inclusive fitness theory, we show that bet hedging and indirect reciprocity could only drive cooperative drifting under improbable conditions. However, diminishing returns to cooperation create a simple context in which sharing workers is adaptive. Using a longitudinal dataset comprising over a quarter of a million nest cell observations, we quantify cooperative payoffs in the Neotropical wasp Polistes canadensis, for which drifting occurs at high levels. As the worker-to-brood ratio rises in a worker’s home colony, the predicted marginal benefit of a worker for expected colony productivity diminishes. Helping related colonies can allow effort to be focused on related brood that are more in need of care. Finally, we use simulations to show that cooperative drifting evolves under diminishing returns when dispersal is local, allowing altruists to focus their efforts on related recipients. Our results indicate the power of nonlinear fitness effects to shape social organization, and suggest that models of eusocial evolution should be extended to include neglected social interactions within colony networks. ? 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	altruism; animal; family; human; social interaction; wasp; Altruism; Animals; Family; Humans; Social Interaction; Wasps
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/256990
作者单位	School of Biological Sciences, University of Bristol, Bristol, United Kingdom; Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom; Centre for Research in Animal Behaviour, University of Exeter, Exeter, United Kingdom; Centre for Biodiversity and Environment Research (CBER), Division of Biosciences, University College London, London, United Kingdom
推荐引用方式 GB/T 7714	Kennedy P.,Sumner S.,Botha P.,et al. Diminishing returns drive altruists to help extended family[J],2021,5(4).
APA	Kennedy P.,Sumner S.,Botha P.,Welton N.J.,Higginson A.D.,&Radford A.N..(2021).Diminishing returns drive altruists to help extended family.Nature Ecology & Evolution,5(4).
MLA	Kennedy P.,et al."Diminishing returns drive altruists to help extended family".Nature Ecology & Evolution 5.4(2021).