Stock-related effects in the recruitment of North Sea haddock and whiting

R. M. Cook, D. W. Armstrong

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A model is developed which describes recruitment in haddock Melanogrammus aeglefinus by the separate effects of total stock and spawning stock. Whilst spawning stock makes an approximately proportionate contribution to egg production, the total stock has an adverse effect on subsequent recruitment. Pre-recruit mortality, which is related to total stock size, appears to be the operative factor. The model can account for c 40% of variation in log recruitment. In whiting Merlangius merlangus c 22% of the variation in log recruitment can be attributed to the negative effect of total stock size. There is no detectable separate spawning-stock effect. -from Authors

Original languageEnglish
Pages (from-to)272-280
Number of pages9
JournalJournal du Conseil - Conseil International pour l'Exploration de la Mer
Issue number3
Publication statusPublished - 1986


  • north sea
  • haddock
  • whiting
  • Melanogrammus aeglefinus
  • fish stocks

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