Correlated evolution of phenotypic plasticity in metamorphic timing

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题名:	Correlated evolution of phenotypic plasticity in metamorphic timing
作者:	江村剛志;Michimae, H;Emura, T
贡献者:	理學院統計研究所
关键词:	amphibian;Animals;Biological Evolution;Cannibalism;Caudata;Chironomidae;Desiccation;desiccation risk;Ecosystem;Environmental factors;evolution;Evolutionary biology;foods;genetics;Genotype & phenotype;growth & development;habitats;Hynobius retardatus;Japan;Larva;Larva - genetics;Larva - physiology;Larvae;Metamorphosis;Metamorphosis, Biological;phenotypic plasticity;physiology;Plasticity;plastics;Ponds;Population genetics;Reptiles & amphibians;salamanders and newts;Urodela;Urodela - genetics;Urodela - growth & development;Urodela - physiology;water level;Water levels
日期:	2012-07-01
上传时间:	2026-04-23 12:52:38 (UTC+8)
出版者:	Wiley-Blackwell Publishing Ltd;Oxford, UK: Wiley-Blackwell
摘要:	摘要： Phenotypic plasticity has long been a focus of research, but the mechanisms of its evolution remain controversial. Many amphibian species exhibit a similar plastic response in metamorphic timing in response to multiple environmental factors; therefore, more than one environmental factor has likely influenced the evolution of plasticity. However, it is unclear whether the plastic responses to different factors have evolved independently. In this study, we examined the relationship between the plastic responses to two experimental factors (water level and food type) in larvae of the salamander Hynobius retardatus, using a cause-specific Cox proportional hazards model on the time to completion of metamorphosis. Larvae from ephemeral ponds metamorphosed earlier than those from permanent ponds when kept at a low water level or fed conspecific larvae instead of larval Chironomidae. This acceleration of metamorphosis depended only on the permanency of the larvae’s pond of origin, but not on the conspecific larval density (an indicator of the frequency of cannibalism) in the ponds. The two plastic responses were significantly correlated, indicating that they may evolve correlatively. Once plasticity evolved as an adaptation to habitat desiccation, it might have relatively easily become a response to other ecological factors, such as food type via the pre-existing developmental pathway.(en) 其他題名： J Evol Biol 出版者： Oxford, UK: Wiley-Blackwell 出版日期： 2012-07 出處： Journal of Evolutionary Biology, 2012-07, Vol.25 (7), p.1331-1339 資源來源： Wiley Online Library Journals 版權： 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology 版權： 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology. 識別號： ISSN: 1010-061X 識別號： ISSN: 1420-9101 識別號： EISSN: 1420-9101 識別號： DOI: 10.1111/j.1420-9101.2012.02523.x 識別號： PMID: 22530725
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