Publication Abstract

An evaluation of the stock structure of North Sea cod, haddock and whiting since 1920, together, with a consideration of the impacts of fisheries and predation effects on their biomass and recruitment

An evaluation of the stock structureof North Sea cod, haddock and whiting since 1920, together, with a consideration of theimpacts of fisheries and predation effects on their biomass and recruitment

J.G. Pope and C.T. Macer

Time series ofpopulation-at-age and fishing mortality rate estimates are extended back to 1921 for NorthSea cod, and to 1920 for North Sea haddock and whiting. The extended time series are usedto examine the ability of various factors to explain the changes in biomass andrecruitment of these roundfish stocks during much of the twentieth century. In particular,the possible impacts of fishing pressure and multispecies interactions are explored.

Reference:

J.G. Pope and C.T. Macer, 1996. An evaluation of the stock structure of North Sea cod,haddock and whiting since 1920, together, with a consideration of the impacts of fisheriesand predation effects on their biomass and recruitment. ICES Journal of Marine Science,53: 1157-1169.

J.G. Pope* and C.T. Macer*

ICES Journal of Marine Science, 53: 1157-1169