Document généré le 10/05/2026 depuis l'adresse: https://www.documentation.eauetbiodiversite.fr/fr/notice/changements-adaptatifs-induits-par-la-peche-chez-les-populations-halieutiques
Titre alternatif
Producteur
Contributeur(s)
Éditeur(s)
AGROCAMPUS OUEST, Vie-Agro-Santé
Identifiant documentaire
9-19013
Identifiant OAI
oai:archimer.ifremer.fr:19013
Auteur(s):
Marty, Lise
Mots clés
: Pêche
évolution adaptative
plasticité phénotypique
norme de réaction
dérive génétique
érosion génétique
age et taille à maturation
croissance
survie
trade-offs
densité-dépendance
gadidées de mer du nord
fishing
adaptive evolution
phenotypic plasticity
reaction norm
genetic drift
genetic erosion
age and size at maturation
growth
survival
trade-offs
density-dependence
North sea Gadoids
Date de publication
13/09/2011
Date de création
Date de modification
Date d'acceptation du document
Date de dépôt légal
Langue
fre
Thème
Type de ressource
Source
Droits de réutilisation
2011 the author
Région
Département
Commune
Description
Fishing is an important source of mortality in harvested populations and therefore may induce adaptive responses. These responses affect life-history traits in particular, which have consequences for stocks’ dynamics, and thus can alter the demographic direct effect of fishing (i.e. the reduction in stock’s biomass). Fishing-induced adaptive changes depend, non-exclusively, on two processes: evolution and phenotypic plasticity. These two components are observed at the phenotypic level because functional genes coding for the traits undergoing adaptive changes have not yet been identified. These two origins are confounded in individual phenotypes, and the impact of adaptive changes in the long run remains therefore unclear: evolutionary changes are expected to be slowly and/or hardly reversible, whereas plastic ones are in principle reversible in one generation. Furthermore, because it decreases total population size, fishing may also accelerate the rate of genetic drift that affects the neutral and functional genetic composition of harvested populations. This thesis is about adaptive changes in life-history traits induced by fishing, with a special focus on age and size at maturation and a case study on North Sea gadoids. It comprises four parts.
Accès aux documents
0
Consultations
0
Téléchargements
