Harvest-induced evolution and effective population size

Show full item record



Permalink

http://hdl.handle.net/10138/167624

Citation

Kuparinen , A , Hutchings , J A & Waples , R S 2016 , ' Harvest-induced evolution and effective population size ' Evolutionary Applications , vol. 9 , no. 5 , pp. 658-672 . DOI: 10.1111/eva.12373

Title: Harvest-induced evolution and effective population size
Author: Kuparinen, Anna; Hutchings, Jeffrey A.; Waples, Robin S.
Contributor: University of Helsinki, Environmental Sciences
Date: 2016
Language: eng
Number of pages: 15
Belongs to series: Evolutionary Applications
ISSN: 1752-4571
URI: http://hdl.handle.net/10138/167624
Abstract: Much has been written about fishery-induced evolution (FIE) in exploited species, but relatively little attention has been paid to the consequences for one of the most important parameters in evolutionary biology-effective population size (N-e). We use a combination of simulations of Atlantic cod populations experiencing harvest, artificial manipulation of cod life tables, and analytical methods to explore how adding harvest to natural mortality affects N-e, census size (N), and the ratio N-e/N. We show that harvest-mediated reductions in N-e are due entirely to reductions in recruitment, because increasing adult mortality actually increases the N-e/N ratio. This means that proportional reductions in abundance caused by harvest represent an upper limit to the proportional reductions in N-e, and that in some cases N-e can even increase with increased harvest. This result is a quite general consequence of increased adult mortality and does not depend on harvest selectivity or FIE, although both of these influence the results in a quantitative way. In scenarios that allowed evolution, N-e recovered quickly after harvest ended and remained higher than in the preharvest population for well over a century, which indicates that evolution can help provide a long-term buffer against loss of genetic variability.
Subject: contemporary evolution
fisheries management
life history evolution
population genetics - empirical
wildlife management
FISHERIES-INDUCED EVOLUTION
EXPLOITED FISH STOCKS
LIFE-HISTORY
OVERLAPPING GENERATIONS
GENETIC COMPENSATION
TEMPORAL-CHANGES
CONSEQUENCES
AGE
OVEREXPLOITATION
COMPONENTS
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
eva12373.pdf 583.5Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record