全球智库信息集成服务系统(G2TT): Adaptive changes in harvested populations: Plasticity and evolution of age and size at maturation.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1098/rspb.2003.2519
	Adaptive changes in harvested populations: Plasticity and evolution of age and size at maturation.
	Ernande B; Dieckmann U; Heino M
发表日期	2004
出处	Proceedings of the Royal Society B: Biological Sciences 271 (1537): 415-423
出版年	2004
语种	英语
摘要	We investigate harvest-induced adaptive changes in age and size at maturation by modelling both plastic variation and evolutionary trajectories. Harvesting mature individuals displaces the reaction norm for age and size at maturation toward older ages and larger sizes and rotates it clockwise, whereas harvesting immature individuals has the reverse qualitative effect. If both immature and mature individuals are harvested, the net effect has approximately the same trend as when harvesting immature individuals only. This stems from the sensitivity of the evolutionary response, which depends on the maturity state of harvested individuals, but also on the type of harvest mortality (negatively or positively density dependent, density independent) and the value of three life-history parameters (natural mortality, growth rate and the trade-off between growth and reproduction). Evolutionary changes in the maturation reaction norm have strong repercussions for the mean size and the density of harvested individuals that, in most cases, result in the reduction of biomass-a response that population dynamical models would overlook. These results highlight the importance of accounting for evolutionary trends in the long-term management of exploited living resources and give qualitative insights into how to minimize the detrimenta consequences of harvest-induced evolutionary changes in maturation reaction norms.
主题	Adaptive Dynamics Network (ADN)
关键词	Age and size at maturation Evolution Exploited populations Harvesting Phenotypic plasticity
URL	http://pure.iiasa.ac.at/id/eprint/7156/
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/128379
推荐引用方式 GB/T 7714	Ernande B,Dieckmann U,Heino M. Adaptive changes in harvested populations: Plasticity and evolution of age and size at maturation.. 2004.