{"refrec":{"BRefID":724,"RR":"<b>Fonds, M.; Blom, W.C.</b> (1996). Onderzoek naar mogelijkheden tot vermindering van discardproductie door technische aanpassing van boomkornetten. <i>BEON Rapport = BEON-report</i>, 96(15). RIKZ: Den Haag. 47 pp.","BEntID":724,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>BEON Rapport = BEON-report</i>, 96(15). RIKZ: Den Haag.  47 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Fonds, M.; Blom, W.C.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Fonds, M.; Blom, W.C.","Englishabstract":"The catch composition of a sole net (8 cm mesh opening) was analysed according to the catch of benthos and undersized fish. Five different methods to decrease the catch of benthos and undersized fish were researched: fewer tickler chains, brushes in stead of ticklers, larger meshes (9 in stead of 8 cm), a double “Anti-Discard” net (AD-net) and a net with very large meshes (200-480 cm) in the upper side of the net (GM-net). Only the AD-net and the GM-net gave clear possibilities to decrease the unwanted by-catch. None of these methods, however, can prevent the damaging of buried benthos. Protection of the coastal area, where undersized fish and vulnerable benthos can be found, is possibly more effective than discard-saving technical constructions. The intensive beam trawling in the southern North Sea, probably already caused changes in the composition of the soil fauna, reducing the numbers of vulnerable benthos and larger fish species, while less vulnerable benthos species and smaller fish species have increased in number.","AbstractOtherLang":"De vangstsamenstelling van een tongennet (8 cm maaswijdte) werd geanalyseerd met betrekking tot de vangst van benthos en ondermaatse vis. Vijf verschillende mogelijkheden om de hoeveelheid ondermaatse vis en benthos in de vangsten te verminderen werder nader onderzocht: minder wekkerkettingen, borstels i.p.v. wekkers, grotere mazen (9 i.p.v. 8 cm), een dubbel \"Anti-Discard\" net (AD-net) en een net met zeer wijde mazen (200-480 cm) in de bovenzijde (GM-net). Alleen het AD-net en het GM-net gaven duidelijke mogelijkheden om ongewenste bijvangsten te verminderen. Geen van de onderzochte mogelijkheden kan echter daadwerkelijk de beschadiging van ingegraven benthos grotendeels voorkomen. Bescherming van het kustgebied, waar zich vooral de ondermaatse vis ophoudt en waar ook veel kwetsbaar benthos voorkomt, is mogelijk meer effectief dan discard-sparende technische constructies. De intensieve boomkorvisserij in de zuidelijke Noordzee heeft vermoedelijk al tot veranderingen in de samenstelling van de bodemfauna geleid, waarbij de kwetsbare benthos soorten en grotere vissoorten zijn afgenomen, terwijl de minder kwetsbare benthossoorten en kleine vissoorten in aantal en dichtheid zijn toegenomen.","BibLvlCode":"MS","StandardTitle":"Onderzoek naar mogelijkheden tot vermindering van discardproductie door technische aanpassing van boomkornetten","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2025-07-21 01:33:23.796402","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1996,"DateUpdate":"2025-07-14","DateCreate":"2000-08-24","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":724,"ISBN":null,"PubliDate":1996,"IssueDate":null,"Volume":"96","Issue":"15","Pagination":"47","Place":"Den Haag","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":33963,"SerRR":"BEON Rapport = BEON-report. Programma Bureau BEON: Den Haag.  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