{"refrec":{"BRefID":204031,"RR":"<b>Depestele, J.; Vandemaele, S.; Vanhee, W.; Polet, H.; Torreele, E.; Leirs, H.; Vincx, M.</b> (2011). Quantifying causes of discard variability: an indispensable assistance to discard estimation and a paramount need for policy measures. <i>ICES J. Mar. Sci./J. Cons. int. Explor. Mer 68(8)</i>: 1719-1725. <a href=\"http://dx.doi.org/10.1093/icesjms/fsr030\" target=\"_blank\">dx.doi.org/10.1093/icesjms/fsr030</a>","BEntID":196217,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>ICES J. Mar. Sci./J. Cons. int. Explor. Mer 68(8)</i>: 1719-1725. <a href=\"https://dx.doi.org/10.1093/icesjms/fsr030\" target=\"_blank\">https://dx.doi.org/10.1093/icesjms/fsr030</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Depestele, J.; Vandemaele, S.; Vanhee, W.; Polet, H.; Torreele, E.; Leirs, H.; Vincx, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Depestele, J. <i>et al.</i>","Englishabstract":"Fishery-dependent data underpin the scientific advice given to fishery managers. However, discard estimates are often imprecise as a result of limited sampling coverage. Estimating discard rates from length frequency distributions (LFDs) in commercial catches may complement information from observer trips. The accuracy of estimates depends greatly on careful investigation of the discard variability. Here, the impact of three essential factors was quantified for beam-trawl fisheries in the southern North Sea: (i) market prices, (ii) landings per trip (LPT) limitations, and (iii) selectivity of the commercial fishing gear. Observed discard rates for cod, plaice, sole, and whiting were compared with estimates based on length frequency data, taking account of the variability attributable to LPT limitations and market price. Observed discard estimates of cod and whiting differed significantly from LFD-derived estimates because of highgrading. The results indicate that LFD-derived discard estimates are only reliable if the crucial driving factors are quantified. LFDs can be collected from research vessels or by fishers in partnership with scientists. Based upon many of these LFDs and the discard-variability factors identified in observer programmes, discard rates can be estimated better. ","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Quantifying causes of discard variability: an indispensable assistance to discard estimation and a paramount need for policy measures","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"beam trawl; discards; fishery management; highgrading; market price; minimum landing size; North Sea; quota","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2016-06-12","DateCreate":"2011-04-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000294075400018","VABBcode":null,"OpenAcc":1,"DOI":"10.1093/icesjms/fsr030"},"refs":null,"anarec":{"AnaID":204031,"PubliDate":2011,"Pagination":"1719-1725","XtraPublOfAnaID":null,"ISBN":null,"Volume":"68","Issue":"8","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":1719,"Pages":7,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Depestele","Firstname":"Jochen","Initials":"J.","Affiliation":"Univ Ghent, B-9000 Ghent, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":148178,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"MARBIOL","InsFSN":"Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie","ORCID":"0000-0001-7554-553X","PersID":9285,"InsID":13},{"AutName":"Vandemaele","Firstname":"Sofie","Initials":"S.","Affiliation":"Univ Antwerp, B-2020 Antwerp, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":148179,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"UA","InsFSN":"Universiteit Antwerpen","ORCID":null,"PersID":11266,"InsID":4538},{"AutName":"Vanhee","Firstname":"Willy","Initials":"W.","Affiliation":"Inst Agr & Fisheries Res ILVO, B-8400 Oostende, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":143671,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"ILVO","InsFSN":"Instituut voor Landbouw-, Visserij- en Voedingsonderzoek","ORCID":null,"PersID":352,"InsID":5442},{"AutName":"Polet","Firstname":"Hans","Initials":"H.","Affiliation":"Inst Agr & Fisheries Res ILVO, B-8400 Oostende, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":143672,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"ILVO","InsFSN":"Instituut voor Landbouw-, Visserij- en Voedingsonderzoek","ORCID":"0000-0002-2953-4108","PersID":694,"InsID":5442},{"AutName":"Torreele","Firstname":"Els","Initials":"E.","Affiliation":"Inst Agr & Fisheries Res ILVO, B-8400 Oostende, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":145913,"OrderNr":5,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"ILVO","InsFSN":"Instituut voor Landbouw-, Visserij- en Voedingsonderzoek","ORCID":null,"PersID":15887,"InsID":5442},{"AutName":"Leirs","Firstname":"Herwig","Initials":"H.","Affiliation":"Univ Antwerp, B-2020 Antwerp, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":143674,"OrderNr":6,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"UA","InsFSN":"Universiteit Antwerpen","ORCID":"0000-0002-7612-5024","PersID":12132,"InsID":4538},{"AutName":"Vincx","Firstname":"Magda","Initials":"M.","Affiliation":"Univ Ghent, B-9000 Ghent, Belgium.","Discriminator":null,"CorporateFlag":0,"BEntID":196217,"AutID":143675,"OrderNr":7,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"MARBIOL","InsFSN":"Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie","ORCID":null,"PersID":19,"InsID":13}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":220961,"LibID":36,"BRefID":204031,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"220961","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":"ANE, North Sea","ThestID":182108,"Acronym":"ASFA_GEOT","ThesTermPath":"ANE, North Sea"},{"ThesaurusTerm":"Beam trawlers","ThestID":841,"Acronym":"ASFA","ThesTermPath":"Beam trawlers"},{"ThesaurusTerm":"Quota regulations","ThestID":6663,"Acronym":"ASFA","ThesTermPath":"Legislation > Fishery regulations > Quota regulations"},{"ThesaurusTerm":"Fishery management","ThestID":3248,"Acronym":"ASFA","ThesTermPath":"Management > Resource management > Fishery management"},{"ThesaurusTerm":"Market prices","ThestID":5036,"Acronym":"ASFA","ThesTermPath":"Market prices"}],"thestermsASFA":[{"ThesaurusTerm":"ANE, North Sea"},{"ThesaurusTerm":"Fishery management"},{"ThesaurusTerm":"Quota regulations"}],"taxtermsASFA":null,"geotermsASFA":[{"GeoTerm":"North Sea"}],"collections":[{"Collection":"OMA - Open Marien Archief","ShortName":"OMA"}],"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"},"545":{"SpName":"Historische zeevisserij","SpColID":545,"ParSpColID":null,"TopParID":null,"ShortName":"Hist. Zeevisserij","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"Hist. Zeevisserij"},"792":{"SpName":"Historische zeevisserij in de Noordzee","SpColID":792,"ParSpColID":545,"TopParID":545,"ShortName":"Hist. Zeevisserij in de Noordzee","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":545,"SpColPath":"Hist. Zeevisserij/Hist. Zeevisserij in de Noordzee"},"548":{"SpName":"Historische zeevisserij: Literatuur","SpColID":548,"ParSpColID":545,"TopParID":545,"ShortName":"Hist. Zeevisserij: Literatuur","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":545,"SpColPath":"Hist. Zeevisserij/Hist. Zeevisserij: Literatuur"},"221":{"SpName":"OMA - Open Marien Archief","SpColID":221,"ParSpColID":null,"TopParID":null,"ShortName":"OMA","URLLocation":null,"LibID":36,"OpenRepoFlag":1,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"OMA"},"422":{"SpName":"Section Marine Biology","SpColID":422,"ParSpColID":null,"TopParID":null,"ShortName":"MarBiol","URLLocation":null,"LibID":null,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"MarBiol"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":196217,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://dx.doi.org/10.1093/icesjms/fsr030","externalID":"10.1093/icesjms/fsr030","URLTypeCode":"DOI","URLID":18264,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"thesterms":[{"ThesaurusTerm":"ANE, North Sea","ThestID":182108,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Beam trawlers","ThestID":841,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Fishery management","ThestID":3248,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Market prices","ThestID":5036,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Quota regulations","ThestID":6663,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":null,"geoterms":[{"GeoTerm":"North Sea","GeoObjectID":2350,"GeotID":390}],"othterms":[{"OtherTerm":"Discards","OthtID":7861}],"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"ANE, North Sea","DutchTerm":null,"ThestID":182108,"Acronym":"ASFA_GEOT","ThesTypID":34,"ThesType":"ASFA Geoterms"},{"ThesaurusTerm":"Beam trawlers","DutchTerm":"Boomkorren","ThestID":841,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Fishery management","DutchTerm":"Visserij management","ThestID":3248,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Market prices","DutchTerm":null,"ThestID":5036,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Quota regulations","DutchTerm":"Quotawetgeving","ThestID":6663,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":null,"geotermsFRIS":[{"GeoTerm":"North Sea","DutchTerm":"Noordzee"}],"othtermsFRIS":[{"OtherTerm":"Discards","DutchTerm":null,"OthtID":7861}],"resmessage":"","complete":1,"sessions":{"newSesName":"Haspeslagh, Jan, J.","newSesDate":{"date":"2011-04-05 11:15:34.457000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Lyssens, Liesbeth, L.","updSesDate":{"date":"2016-06-12 21:32:04.887000","timezone_type":3,"timezone":"Europe/Brussels"}}}