Construction of discard estimates from survey and market samples

O.A. van Keeken, R.E. Grift, M. Dickey-Collas

    Research output: Book/ReportReportProfessional


    Most stock assessments in the North Sea, like those of plaice and sole, are currently based on catch statistics of landings into ports and not on the catch by the fleets. Discarding is the process where part of the catch (usually undersized fish) is thrown back into the sea immediately after being caught. The survival of discarded fish is very low. Not taking discards into account in a stock assessment could lead to underestimation of the fishing mortality, mostly on the youngest ages. This could lead to systematic differences in catch forecasts and errors in the estimation of incoming year classes.
    Original languageEnglish
    Place of PublicationIJmuiden
    Number of pages53
    Publication statusPublished - 2004

    Publication series

    NameRIVO report


    • fishery resources
    • plaice
    • dover soles
    • discards
    • fishery management
    • models
    • beam trawling
    • north sea


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