全球智库信息集成服务系统(G2TT): The conservation and fishery benefits of protecting large pike Esox lucius L. by harvest regulations in recreational fishing.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1016/j.biocon.2010.03.020
	The conservation and fishery benefits of protecting large pike Esox lucius L. by harvest regulations in recreational fishing.
	Arlinghaus R; Matsumura S; Dieckmann U
发表日期	2010
出处	Biological Conservation 143 (6): 1444-1459
出版年	2010
语种	英语
摘要	Traditional fisheries management theory supports aggressive exploitation of old and large fish to maximize a stock's biomass production and yield. Here we present an age-structured fish population model with multidimensional density-dependence to test the hypotheses that protection of large, fecund individuals is beneficial for the population and seleted fisheries variables and that effects of maternal size on early survival rate change the resilience and fisheries productivity of a pike population (Esox lucius L.) exploited by recreational angling. We find that, compared to the traditional regulatory approach of management by small minimum- length limits (so that culling of large fish is encouraged), preservation of large and old individuals through harvestable-slot length limits promises considerable benefits for fisheries quality, without compromising the long-term conservation of the population. We also find that ignoring maternal effects on early survival of offspring might overestimate the equilirium spawning stock abundance by up to 17% and the predicted harvest by up to 11%, potentially putting pike populations at risk from overharvest if size-dependent maternal effects are ignored in fisheries models. If the findings from our simulation study hold for empirical systems, they suggest altered harvest regulations in many of consumptive pike recreational fisheries are needed to protect large individuals to a greater extent that currently pursued.
主题	Evolution and Ecology (EEP)
关键词	Angling Maternal effects Recreational fishing Recruitment Size selectivity Spawning potential ratio
URL	http://pure.iiasa.ac.at/id/eprint/9261/
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/129146
推荐引用方式 GB/T 7714	Arlinghaus R,Matsumura S,Dieckmann U. The conservation and fishery benefits of protecting large pike Esox lucius L. by harvest regulations in recreational fishing.. 2010.