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 505698
Title The response of the North Sea demersal fish community to changing fishing pressure as seen through the prism of the large fish indicator
Author(s) Stamoulis, Antonios; Torreele, Els
Source Fisheries Research 181 (2016). - ISSN 0165-7836 - p. 222 - 233.
Department(s) Aquaculture and Fisheries
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Demersal fish community - Good environmental status (GES) - Large fish indicator (LFI) - North Sea - Size-based indicators

The large fish indicator (LFI) is a size-based indicator of fish community state. In the North Sea, the LFI is already established as the fish community's Ecological Quality Objective (OSPAR-EcoQO). The LFI has also been proposed as an indicator for food webs and for monitoring of biodiversity in European regional seas. The LFI was developed based on the entire North Sea fish community, which ignores the differences between the southern and the northern fish communities from the International Bottom Trawl Survey (IBTS) data. In this study, we have calculated LFIs based on IBTS and the Beam Trawl Survey (BTS), which target different components of the fish community and we test whether the LFI responds to changes in fishing pressure. The results did not confirm our expectation of a negative correlation between the pressure and state. We found a positive relationship between the IBTS-based LFI and the roundfish fishing mortality as well as an inverse relationship between the BTS-based LFI and the flatfish fishing mortality. The differences in the relationships between the IBTS- and BTS-based LFI and the respective roundfish-averaged and flatfish-averaged fishing mortality confirmed the spatial differences between the North Sea roundfish and flatfish fish communities. Although previous relationships between the LFI and the fishing pressure involved lengthy time-lags (10-12 years), we found shorter responsiveness of the LFI of 1-2 years. Further understanding of the ecological, environmental and anthropogenic factors affecting the LFI is required before ecosystem objectives can be set within the MSFD.

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