全球智库信息集成服务系统(G2TT): Impact of environmental covariation in growth and mortality on evolving maturation reaction norms.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1086/658988
	Impact of environmental covariation in growth and mortality on evolving maturation reaction norms.
	Marty L; Dieckmann U; Rochet M-J; Ernande B
发表日期	2011
出处	The American Naturalist 177 (4): E98-E118
出版年	2011
语种	英语
摘要	Maturation age and size have important fitness consequences through their effects on survival probabilities and body sizes. The evolution of maturation reaction norms in response to environmental covariation in growth and mortality is therefore a key subject of life-history theory. The eco-evolutionary model we present and analyze here incorporates critical features that earlier studies of evolving maturation reaction norms have often neglected: the trade-off between growth and reproduction, source-sink population structure, and population regulation through density-dependent growth and fecundity. We report the following findings. First, the evolutionarily optimal age at maturation can be decomposed into the sum of a density-dependent and a density-independent component. These components measure, respectively, the hypothetical negative age at which an individual's length would be 0 and the delay in maturation relative to this offset. Second, along any growth trajectory, individuals mature earlier when mortality is higher. This allows us to deduce, third, how the shapes of evolutionarily optimal maturation reaction norms depend on the covariation between growth and mortality (positive or negative, linear or curvilinear, and deterministic or probabilistic). Providing eco-evolutionary explanations for many alternative reaction-norm shapes, our results appear to be in good agreement with current empirical knowledge on maturation dynamics.
主题	Evolution and Ecology (EEP)
关键词	Phenotypic plasticity Growth-reproduction trade-off Source-sink population structure Density dependence Selection gradient
URL	http://pure.iiasa.ac.at/id/eprint/9610/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/129321
推荐引用方式 GB/T 7714	Marty L,Dieckmann U,Rochet M-J,et al. Impact of environmental covariation in growth and mortality on evolving maturation reaction norms.. 2011.