气候变化领域集成服务门户(CCPortal): The evolution of targeted cannibalism and cannibal-induced defenses in invasive populations of cane toads

CCPortal

DOI	10.1073/pnas.2100765118
	The evolution of targeted cannibalism and cannibal-induced defenses in invasive populations of cane toads
	DeVore J.L.; Crossland M.R.; Shine R.; Ducatez S.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:35
英文摘要	Biotic conflict can create evolutionary arms races, in which innovation in one group increases selective pressure on another, such that organisms must constantly adapt to maintain the same level of fitness. In some cases, this process is driven by conflict among members of the same species. Intraspecific conflict can be an especially important selective force in high-density invasive populations, which may favor the evolution of strategies for outcompeting or eliminating conspecifics. Cannibalism is one such strategy; by killing and consuming their intraspecific competitors, cannibals enhance their own performance. Cannibalistic behaviors may therefore be favored in invasive populations. Here, we show that cane toad tadpoles (Rhinella marina) from invasive Australian populations have evolved an increased propensity to cannibalize younger conspecifics as well as a unique adaptation to cannibalism-a strong attraction to vulnerable hatchlings-that is absent in the native range. In response, vulnerable conspecifics from invasive populations have evolved both stronger constitutive defenses and greater cannibal-induced plastic responses than their native range counterparts (i.e., rapid prefeeding development and inducible developmental acceleration). These inducible defenses are costly, incurring performance reductions during the subsequent life stage, explaining why plasticity is limited in native populations where hatchlings are not targeted by cannibalistic tadpoles. These results demonstrate the importance of intraspecific conflict in driving rapid evolution, highlight how plasticity can facilitate adaptation following shifts in selective pressure, and show that evolutionary processes can produce mechanisms that regulate invasive populations. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Baldwin effects; Canalization; Co-adaptation; Phenotypic plasticity; Plasticity costs
语种	英语
scopus关键词	acceleration; animal experiment; article; Australian; cannibalism; hatchling; human; nonhuman; phenotypic plasticity; Rhinella marina; tadpole
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238817
作者单位	School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia; Department of Biological Sciences, Macquarie University, Sydney, NSW 2113, Australia; Institut de Recherche pour le Développement, UMR 241, EIO (Écosystèmes Insulaires Océaniens), Faa'a, Tahiti, 98702, French Polynesia
推荐引用方式 GB/T 7714	DeVore J.L.,Crossland M.R.,Shine R.,et al. The evolution of targeted cannibalism and cannibal-induced defenses in invasive populations of cane toads[J],2021,118(35).
APA	DeVore J.L.,Crossland M.R.,Shine R.,&Ducatez S..(2021).The evolution of targeted cannibalism and cannibal-induced defenses in invasive populations of cane toads.Proceedings of the National Academy of Sciences of the United States of America,118(35).
MLA	DeVore J.L.,et al."The evolution of targeted cannibalism and cannibal-induced defenses in invasive populations of cane toads".Proceedings of the National Academy of Sciences of the United States of America 118.35(2021).