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Evaluation of status of commercial fish stocks in European marine subareas using mean trophic levels of fish landings and spawning stock biomass

2017-07Journal article Open access
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dc.contributor.authorJayasinghe, R. P. Prabath K.
dc.contributor.authorAmarasinghe, Upali S.
dc.contributor.authorNewton, Alice
dc.date.accessioned2018-12-07T14:53:16Z
dc.date.available2018-12-07T14:53:16Z
dc.date.issued2017-07
dc.description.abstractMost of the fish stocks in the world, including European fish stocks, are threatened by overfishing and/or degraded environmental conditions. Although the Common Fisheries Policy (CFP) is the main policy instrument managing fish stocks in Europe, there is continued concern as to whether commercial fish stocks will achieve Good Environmental Status (GEnS) in 2020 in accordance with the Marine Strategy Framework Directive (MSFD). In this context, the evaluation of the status of fish stocks in the subareas of FAO fishing area 27 was carried out using mean trophic levels (MTL) in fish landings and spawning stock biomass (SSB). Comparisons were made before and after 2008 to establish whether the trend is positive or negative. The main data sources for landings and SSB were the International Council for the Exploration of the Sea (ICES) advisory reports. MTLs in landing and SSB were determined for each subarea and the subareas were categorized into four groups, according to MTLs after 2008. The first group (subareas I + II, V) had higher MTL in landings and higher MTL in SSB after 2008. Therefore, fisheries in these subareas appear sustainable. The second group was subareas VIII + IX, for which the fish stocks have higher MTL in landings but low MTL in SSB, indicating that SSB was being overfished. The third was subarea (VI), where fish stocks have lower MTL in landings than those in SSB after 2008, which may indicate that fish stocks are recovering. Fish stocks in the fourth group (subareas III, IV and VII) had low MIL in landings and the MTL in SSB was lower than that of landings before 2008. This may be due to heavy fishing. In addition, we estimated the harvest rate (HR) of the fish stocks before and after 2008. The results showed that most of the fish stocks have lower HR after 2008, indicating that the status has improved, perhaps due to improvements in the implementation of CFP. However, some fish stocks showed high HR even after 2008, so that new management options are still needed. Other factors such as eutrophication, seafloor disturbances, marine pollution, invasive species etc., influence SSB ecosystem health options and should also be incorporated in the management criteria. Most of these environmental pressures are of high priority in the MSFD, and therefore the findings of this study will be useful for both CFP and MSFD. (C) 2016 The Authors. Published by Elsevier Ltd.
dc.description.sponsorshipErasmus Mundus Joint Doctorate in Marine and Coastal Management (MACOMA); EC 7FP [308392]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.ocecoaman.2016.07.002
dc.identifier.issn0964-5691
dc.identifier.issn1873-524X
dc.identifier.urihttp://hdl.handle.net/10400.1/11435
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Sci Ltd
dc.relationDEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCommon fisheries policy
dc.subjectFood-web
dc.subjectManagement
dc.subjectEcosystem
dc.subjectIndicators
dc.subjectSea
dc.titleEvaluation of status of commercial fish stocks in European marine subareas using mean trophic levels of fish landings and spawning stock biomass
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status
oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/308392/EU
oaire.citation.endPage163
oaire.citation.startPage154
oaire.citation.titleOcean and Coastal Management
oaire.citation.volume143
oaire.fundingStreamFP7
person.familyNameNewton
person.givenNameAlice
person.identifier333937
person.identifier.ciencia-id6F13-1247-B2B7
person.identifier.orcid0000-0001-9286-5914
person.identifier.scopus-author-id7201391894
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication636c0a22-6cf2-4324-a704-64777269e97d
relation.isAuthorOfPublication.latestForDiscovery636c0a22-6cf2-4324-a704-64777269e97d
relation.isProjectOfPublicationd4aba6a0-5743-4148-9cad-d2a9fb72bc4f
relation.isProjectOfPublication.latestForDiscoveryd4aba6a0-5743-4148-9cad-d2a9fb72bc4f

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