Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 403433
Title Development of the EcoQO for the North Sea fish community
Author(s) Greenstreet, S.P.R.; Rogers, S.I.; Rice, J.C.; Piet, G.J.; Guirey, E.
Source ICES Journal of Marine Science 68 (2011)1. - ISSN 1054-3139 - p. 1 - 11.
DOI https://doi.org/10.1093/icesjms/fsq156
Department(s) IMARES Vis
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) size-based indicators - ecosystem approach - transfer efficiencies - reference points - food webs - body-mass - model - management - fisheries - spectra
Abstract Development of the Ecological Quality Objective (EcoQO) for the North Sea demersal fish community is described. Size-based metrics were identified as the most effective indicators of the state of the community, but such metrics are also sensitive to environmental influence. Redefining the large fish indicator (LFI) produced a metric more sensitive to fishing-induced change and therefore more useful to managers. Fish stocks were thought to be exploited at a sustainable rate in the early 1980s, so in a process echoing the precautionary approach to fish stock management, this was considered the reference period for the LFI, suggesting a value of 0.3 as the appropriate EcoQO. The LFI declined from around 0.3 in 1983 to 0.05 in 2001, followed by a recovery to 0.22 in 2008. However, analyses of the longer-term groundfish survey data suggest that, even were fishing pressure to be reduced to early 20th century levels, the LFI would be unlikely to rise much above a value of 0.3. The response of the LFI to variation in fishing pressure suggested a more complex relationship than anticipated, underscoring the need for operational theoretical size-resolved multispecies fish community models to support management towards broader ecosystem objectives.
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