Fishery-induced selection on an Alpine whitefish: quantifying genetic and environmental effects on individual growth rate

Details

Ressource 1Request a copy Sous embargo indéterminé.
State: Public
Version: Final published version
Serval ID
serval:BIB_57F27C29D0AE
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fishery-induced selection on an Alpine whitefish: quantifying genetic and environmental effects on individual growth rate
Journal
Evolutionary Applications
Author(s)
Nusslé S., Bornand C.N., Wedekind C.
ISSN
1752-4571
Publication state
Published
Issued date
2009
Peer-reviewed
Oui
Volume
2
Number
2
Pages
200-208
Language
english
Abstract
Size-selective fishing, environmental changes and reproductive strategies are expected to affect life-history traits such as the individual growth rate. The relative contribution of these factors is not clear, particularly whether size-selective fishing can have a substantial impact on the genetics and hence on the evolution of individual growth rates in wild populations. We analysed a 25-year monitoring survey of an isolated population of the Alpine whitefish Coregonus palaea. We determined the selection differentials on growth rate, the actual change of growth rate over time and indicators of reproductive strategies that may potentially change over time. The selection differential can be reliably estimated in our study population because almost all the fish are harvested within their first years of life, i.e. few fish escape fishing mortality. We found a marked decline in average adult growth rate over the 25 years and a significant selection differential for adult growth, but no evidence for any linear change in reproductive strategies over time. Assuming that the heritability of growth in this whitefish corresponds to what was found in other salmonids, about a third of the observed decline in growth rate would be linked to fishery-induced evolution. Size-selective fishing seems to affect substantially the genetics of individual growth in our study population.
Keywords
Artificial selection, Contemporary evolution, Coregonus, Salmonid, Selection differential
Web of science
Open Access
Yes
Create date
20/11/2008 23:28
Last modification date
20/08/2019 15:11
Usage data