Maladaptive changes in multiple traits caused by fishing: impediments to population recovery

被引：290

作者：

Walsh, MR ^{[1
]}

Munch, SB

Chiba, S

Conover, DO

机构：

[1] SUNY Stony Brook, Marine Sci Res Ctr, Stony Brook, NY 11794 USA

[2] Tokyo Univ Agr, Dept Bioind, Abashiri, Hokkaido 0992493, Japan

来源：

ECOLOGY LETTERS | 2006年 / 9卷 / 02期

关键词：

biodiversity; conservation biology; correlated characters; exploited fisheries; life history evolution; overharvesting; size selection;

D O I：

10.1111/j.1461-0248.2005.00858.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Some overharvested fish populations fail to recover even after considerable reductions in fishing pressure. The reasons are unclear but may involve genetic changes in life history traits that are detrimental to population growth when natural environmental factors prevail. We empirically modelled this process by subjecting populations of a harvested marine fish, the Atlantic silverside, to experimental size-biased fishing regimes over five generations and then measured correlated responses across multiple traits. Populations where large fish were selectively harvested (as in most fisheries) displayed substantial declines in fecundity, egg volume, larval size at hatch, larval viability, larval growth rates, food consumption rate and conversion efficiency, vertebral number, and willingness to forage. These genetically based changes in numerous traits generally reduce the capacity for population recovery.

引用

页码：142 / 148

页数：7

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