Stock trends in six North Sea stocks as revealed by an analysis of research vessel surveys

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A model is developed for the analysis of age disaggregated indices of abundance from which stock trends can be estimated. The model is used to examine trends in North Sea cod (Gadus morhua), haddock (Melanogrammus aeglefinus), whiting (Merlangius merlangus), sole (Solea solea), plaice (Pleuronectes platessa) and herring (Clupea harengus). These are compared with the trends estimated from conventional ICES assessments which use commercial catch-at-age data. The catch data are known to be affected by misreporting which can affect the calculated stock trends. The surveys appear to be able to quantify the trends in recruitment and spawning stock with a high degree of consistency between independent surveys of the same stock and with the conventional assessment. Estimates of catch and fishing mortality rate are more uncertain. The well known problems of catch mis-reporting which affect the conventional ICES assessments do not appear large enough to alter the perception of stock trends.

LanguageEnglish
Pages924-933
Number of pages10
JournalICES Journal of Marine Science
Volume54
Issue number5
DOIs
Publication statusPublished - 1 Jan 1997

Fingerprint

research vessel
North Sea
Merlangius merlangus
Pleuronectes
Melanogrammus aeglefinus
Solea solea
Pleuronectes platessa
whiting
haddock
Clupea harengus
cod (fish)
herring
Gadus morhua
spawning
catch statistics
fishing mortality
sea
trend
analysis
mortality

Keywords

  • model
  • North Sea
  • stock trends
  • surveys

Cite this

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Stock trends in six North Sea stocks as revealed by an analysis of research vessel surveys. / Cook, R. M.

In: ICES Journal of Marine Science, Vol. 54, No. 5, 01.01.1997, p. 924-933.

Research output: Contribution to journalArticle

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