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Revisiting the influences of parent stock, temperature, and predation on the recruitment of the northeast Arctic cod stock, 1930-1990
Pope, J.; Large, P.A.; Jakobsen, T. (2001). Revisiting the influences of parent stock, temperature, and predation on the recruitment of the northeast Arctic cod stock, 1930-1990. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 58(5): 967-972. https://dx.doi.org/10.1006/jmsc.2001.1100
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Behaviour > Feeding behaviour > Cannibalism
    Organisms > Aquatic organisms > Animals > Aquatic animals > Marine animals > Fishes > Aquatic animals > Marine fishes > Osteichthyes > Cod
    PNE, Arctic
    Properties > Physical properties > Thermodynamic properties > Temperature
    Stock assessment
    Arctic Ocean [Marine Regions]
    Marien/Kust
Auteurs  Top 
  • Pope, J.
  • Large, P.A., correspondent
  • Jakobsen, T.
Abstract
    The data sets required for constructing age-based models for the Northeast Arctic cod stock are extended back to 1930 and critically reviewed. The full data set (1930-1994) is interpreted by both a standard virtual population analysis (VPA) and a version that allows for cannibalism. The resulting extended time-series of population abundance-at-age is used to reconsider the parent stock, temperature, and predation relationships described earlier. Results from the version of the VPA with cannibalism based on the new data confirm the earlier findings that temperature and spawning-stock biomass had a significant positive effect on recruitment. This is not the case with the extended time-series as interpreted by the standard VPA because, while significant temperature and juvenile predation effects are still found, a parent stock effect is no longer statistically significant. Moreover, the general level of explanation provided by the multiple regression is far less with the extended time-series.
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