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

Time series of population-at-age and fishing mortality rate estimates are extended back to 1921 for North Sea cod, and to 1920 for North Sea haddock and whiting. The extended time series are used to examine the ability of various factors to explain the changes in biomass and recruitment of these rou...

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Bibliographic Details
Published in:ICES journal of marine science 1996-12, Vol.53 (6), p.1157-1069
Main Authors: Pope, J. G., Macer, C. T.
Format: Article
Language:English
Subjects:
extended time series
fishing mortalities
multispecies assessment
predation rate
stock/recruitment
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Summary:Time series of population-at-age and fishing mortality rate estimates are extended back to 1921 for North Sea cod, and to 1920 for North Sea haddock and whiting. The extended time series are used to examine the ability of various factors to explain the changes in biomass and recruitment of these roundfish stocks during much of the twentieth century. In particular, the possible impacts of fishing pressure and multispecies interactions are explored.
ISSN:1054-3139
1095-9289
DOI:10.1006/jmsc.1996.0141