Improved estimates of the natural mortality rates of nine commercially important fish species included in the North Sea Multispecies VPA model

The multispecies virtual population analysis (MSVPA) model developed for the North Sea by the ICES Multispecies Assessment Working Group estimates the predation mortalities for 9 commercially important fish stocks which are due to the five main predators in the North Sea: cod, haddock, whiting, sait...

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Bibliographic Details
Published in:Journal du conseil - Conseil international pour l'exploration de la mer 1990-01, Vol.46 (2), p.211-223
Main Author: Sparholt, H
Format: Article
Language:English
Subjects:
Marine
Online Access:Get full text
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Summary:The multispecies virtual population analysis (MSVPA) model developed for the North Sea by the ICES Multispecies Assessment Working Group estimates the predation mortalities for 9 commercially important fish stocks which are due to the five main predators in the North Sea: cod, haddock, whiting, saithe, and mackerel. This paper presents estimates of the predation mortalities for the 9 species which are caused by all fish other than the five MSVPA predators, and by seabirds and seals. These mortalities are estimated to be 48% of those caused by the five MSVPA predators. The remaining natural mortality, caused by other factors than predation (e.g. disease, spawning stress, senility), is evaluated from the literature.
ISSN:0020-6466