Show simple item record

dc.contributor.authorEide, Arne
dc.date.accessioned2018-12-03T08:39:50Z
dc.date.available2018-12-03T08:39:50Z
dc.date.issued2017-12-26
dc.description.abstractHarvest Control Rules are predefined heuristic decision rules to provide quota advices for managed fisheries. Frequently statistical methods and biological assumptions expressed in mathematical models, are used to provide the Harvest Control Rules with initial information (indicators values). The aim of this article is to investigate a possible way forward of replacing these inputs by quantities of measurable observations, e.g. catch-at-age statistics. The article presents a method by which recruitment indexes and stock biomass indicators are obtained by non-parametric use of annual catch-at-age records, without filtering the raw data (observations) through mathematical models. Two related methods, applied on three empirical cases, are provided: First, showing that recruitment strengths of the Northeast Arctic cod, haddock, and saithe stocks, obtained by fuzzy logic methodology, are satisfactory captures by the use of catch-at-age data. Second, stock size indicators are estimated for the three species by the same catch-at-age data. The second task turns out to be more challenging than the first, but also in the case of stock size evaluation, the suggested procedure provides reasonable results when compared to standard stock assessment methodsen_US
dc.descriptionThe accepted manuscript (AM) is the final draft author manuscript, as accepted for publication by a journal, including modifications based on referees’ suggestions, before it has undergone copyediting, typesetting and proof correction. This is sometimes referred to as the post-print version. Source at: <a href=http://doi.org/10.1093/icesjms/fsx227> http://doi.org/10.1093/icesjms/fsx227</a>en_US
dc.identifier.citationEide, A. (2017). Substituting model based indicators in Harvest Control Rules by observations using fuzzy logic methodology. ICES Journal of Marine Science. 1-11. http://doi.org/10.1093/icesjms/fsx227en_US
dc.identifier.cristinIDFRIDAID 1518117
dc.identifier.doi10.1093/icesjms/fsx227
dc.identifier.issn1054-3139
dc.identifier.issn1095-9289
dc.identifier.urihttps://hdl.handle.net/10037/14265
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.relation.journalICES Journal of Marine Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/727891/EU/ Responsive Results-Based Management and capacity building for EU Sustainable Fisheries Partnership Agreement- and international waters/FarFish/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fangst: 925en_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.titleSubstituting model based indicators in Harvest Control Rules by observations using fuzzy logic methodologyen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record