Cod recruitment is strongly affected by climate when stock biomass is low
- 1 January 2005
- journal article
- Published by Oxford University Press (OUP) in ICES Journal of Marine Science
- Vol. 62 (3) , 339-343
Abstract
Stocks of Atlantic cod (Gadus morhua) have been declining over much of the North Atlantic for the past 30 years, owing to a combination of overfishing and adverse changes in their environment. In a previous study, environmental effects were introduced as an extra parameter in the stock-recruit relationship, where they act as a multiplier, independent of the level of spawning-stock biomass (SSB). Using a non-parametric pooled analysis of all cod stocks on the European Shelf south of 62°N, it is shown here that environmental variability (as represented by the North Atlantic Oscillation) only has a significant effect on recruitment when the spawning stock is low. This has implications for fisheries management strategies, and for rates of stock recovery, which will be very dependent on environmental conditions.Keywords
This publication has 18 references indexed in Scilit:
- Effect of the North Atlantic Oscillation on recruitment of Atlantic cod (Gadus morhua)Canadian Journal of Fisheries and Aquatic Sciences, 2004
- Plankton effect on cod recruitment in the North SeaNature, 2003
- What kinds of fish stock predictions do we need and what kinds of information will help us to make better predictions?Scientia Marina, 2003
- Fisheries and Climate2003
- Climate change and the North Atlantic Oscillation2003
- The North Atlantic Oscillation: Climatic Significance and Environmental Impact2003
- Adaptive Thinking2002
- Environmental and stock effects on spatial distribution and abundance of mature cod Gadus morhuaMarine Ecology Progress Series, 2002
- Effects of environmental variability on growth and recruitment in cod (Gadus morhua) using a comparative approachOceanologica Acta, 2000
- Potential collapse of North Sea cod stocksNature, 1997