{"refrec":{"BRefID":139514,"RR":"<b>Aarts, G.; Poos, J.-J.</b> (2009). Comprehensive discard reconstruction and abundance estimation using flexible selectivity functions. <i>ICES J. Mar. Sci./J. Cons. int. Explor. Mer 66(4)</i>: 763-771. <a href=\"https://dx.doi.org/10.1093/icesjms/fsp033\" target=\"_blank\">https://dx.doi.org/10.1093/icesjms/fsp033</a>","BEntID":133076,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>ICES J. Mar. Sci./J. Cons. int. Explor. Mer 66(4)</i>: 763-771. <a href=\"https://dx.doi.org/10.1093/icesjms/fsp033\" target=\"_blank\">https://dx.doi.org/10.1093/icesjms/fsp033</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Aarts, G.; Poos, J.-J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Aarts, G.; Poos, J.-J.","Englishabstract":"The additional mortality caused by discarding may hamper the sustainable use of marine resources, especially if it is not accounted for in stock assessment and fisheries management. Generally, long and precise time-series on age-structured landings exist, but historical discard estimates are often lacking or imprecise. The flatfish fishery in the North Sea is a mixed fishery targeting mainly sole and plaice. Owing to the gear characteristics and a minimum landing size for these species, considerable discarding occurs, especially for juvenile plaice. Discard samples collected by on-board observers are available since 1999 from a limited number of commercial fishing trips. Here, we develop a statistical catch-at-age model with flexible selectivity functions to reconstruct historical discards and estimate stock abundance. We do not rely on simple predefined selectivity ogives, but use spline smoothers to capture the unknown non-linear selectivity and discard patterns, and allow these to vary in time. The model is fitted to the age-structured landings, discards, and survey data, the most appropriate model is selected, and estimates of uncertainty are obtained","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Comprehensive discard reconstruction and abundance estimation using flexible selectivity functions","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-08 01:30:52.516658","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"discards; North Sea; plaice; population dynamics; splines; statisticalmodels","OtherDescriptors":null,"Notes":null,"AnaPub":2009,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2009-07-10","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000265096600016","VABBcode":null,"OpenAcc":1,"DOI":"10.1093/icesjms/fsp033"},"refs":null,"anarec":{"AnaID":139514,"PubliDate":2009,"Pagination":"763-771","XtraPublOfAnaID":null,"ISBN":null,"Volume":"66","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44710,"SerRR":"ICES Journal of Marine Science. Academic Press: London.  ISSN 1054-3139; e-ISSN 1095-9289","StandardTitleSer":"ICES Journal of Marine Science","ISSN":"1054-3139","AbbrevSer":"ICES J. Mar. Sci./J. Cons. int. Explor. Mer","StandardTitleMon":null,"StartPage":763,"Pages":9,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":[{"XBRefID":201692,"RefStrFull":"<b>Aarts, G.; Poos, J.-J.</b> (2010). Comprehensive discard reconstruction and abundance estimation using flexible selectivity functions, <b><i>in</i></b>: Poos, J.-J. <i>Effort allocation of the Dutch beam trawl fleet.</i> pp. 127-147","RelID":4,"RelationY":"Related to","StandardTitle":"Comprehensive discard reconstruction and abundance estimation using flexible selectivity functions"}],"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Aarts","Firstname":null,"Initials":"G.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":133076,"AutID":51567,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Poos","Firstname":"Jan Jaap","Initials":"J.-J.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":133076,"AutID":72134,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":"0000-0002-8507-5751","PersID":25165,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":211522,"LibID":36,"BRefID":139514,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"211522","RFID":null,"PaidValue":null,"Medium":"Server","Description":"VLIZ Open Access","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open access","URL":null,"ClassifID":53,"Classification":"Open access","ReqLink":null,"ClassifTypID":1,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":null,"InternalReq":0,"LoggedInReq":0,"Disclaimer":null,"DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Academic Press","City":"London"}],"MONpubls":null,"pictures":[],"thestermsPath":[{"ThesaurusTerm":"Flatfish fisheries","ThestID":3305,"Acronym":"ASFA","ThesTermPath":"Fisheries > Finfish fisheries > Flatfish fisheries"},{"ThesaurusTerm":"Population dynamics","ThestID":9702,"Acronym":"ASFA","ThesTermPath":"Population dynamics"},{"ThesaurusTerm":"Splines","ThestID":7907,"Acronym":"ASFA","ThesTermPath":"Splines"},{"ThesaurusTerm":"Statistical models","ThestID":82015,"Acronym":"CSA","ThesTermPath":"Statistical models"}],"thestermsASFA":[{"ThesaurusTerm":"Flatfish fisheries"},{"ThesaurusTerm":"Population dynamics"},{"ThesaurusTerm":"Splines"},{"ThesaurusTerm":"Statistical models"}],"taxtermsASFA":null,"geotermsASFA":null,"collections":null,"conf":null,"proj":null,"Physdatasets":null,"spcols":null,"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":133076,"AbstractFlag":-1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":133076,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://dx.doi.org/10.1093/icesjms/fsp033","externalID":"10.1093/icesjms/fsp033","URLTypeCode":"DOI","URLID":60782,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"thesterms":[{"ThesaurusTerm":"Flatfish fisheries","ThestID":3305,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Population dynamics","ThestID":9702,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Splines","ThestID":7907,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Statistical models","ThestID":82015,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"}],"taxterms":null,"geoterms":null,"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"Flatfish fisheries","DutchTerm":"Platvis-visserij","ThestID":3305,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Population dynamics","DutchTerm":"Populatiedynamiek","ThestID":9702,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Splines","DutchTerm":null,"ThestID":7907,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Statistical models","DutchTerm":null,"ThestID":82015,"Acronym":"CSA","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus"}],"taxtermsFRIS":null,"geotermsFRIS":null,"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2009-07-10 13:09:47.253000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Lyssens, Liesbeth, L.","updSesDate":{"date":"2018-02-13 19:34:46.407000","timezone_type":3,"timezone":"Europe/Brussels"}}}