Publicaties | Kaarten

nieuwe zoekopdracht

[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Maturation trends indicative of rapid evolution preceded the collapse of northern cod
Olsen, E.M.; Heino, M.; Lilly, G.R.; Morgan, M.J.; Brattey, J.; Ernande, B.; Dieckmann, U. (2004). Maturation trends indicative of rapid evolution preceded the collapse of northern cod. Nature (Lond.) 428(6986): 932-935
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Moratoria
    Phenotypes
    Plasticity
    Population characteristics > Population number
    Population functions > Growth
    Population functions > Mortality
    Properties > Physical properties > Optical properties > Extinction coefficient
    Gadus morhua Linnaeus, 1758 [WoRMS]
    Marien/Kust
Auteurs  Top 
  • Olsen, E.M.
  • Heino, M.
  • Lilly, G.R.
  • Morgan, M.J.
  • Brattey, J.
  • Ernande, B.
  • Dieckmann, U.
Abstract
    Northern cod, comprising populations of Atlantic cod (Gadus morhua) off southern Labrador and eastern Newfoundland, supported major fisheries for hundreds of years. But in the late 1980s and early 1990s, northern cod underwent one of the worst collapses in the history of fisheries. The Canadian government closed the directed fishing for northern cod in July 1992, but even after a decade-long offshore moratorium, population sizes remain historically low. Here we show that, up until the moratorium, the life history of northern cod continually shifted towards maturation at earlier ages and smaller sizes. Because confounding effects of mortality changes and growth-mediated phenotypic plasticity are accounted for in our analyses, this finding strongly suggests fisheries-induced evolution of maturation patterns in the direction predicted by theory. We propose that fisheries managers could use the method described here as a tool to provide warning signals about changes in life history before more overt evidence of population decline becomes manifest.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ.