By-catch in a 40 mm PE demersal trawl codend

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dc.contributor.authorOzbilgin, YD
dc.contributor.authorTosunoglu, Z
dc.contributor.authorOzbilgin, H
dc.date.accessioned2019-10-27T19:21:31Z
dc.date.available2019-10-27T19:21:31Z
dc.date.issued2006
dc.departmentEge Üniversitesien_US
dc.description.abstractDemersal trawling in Turkish waters yields a considerable amount of by-catch and discard. Data presented in this study were collected during a demersal trawl codend selectivity trial carried out on board the RV Egesuf (27 m, 500 HP) between August 9 and September 4, 2002, in Izmir Bay. In total, 52 species of fish and invertebrate from 40 mm nominal mesh size commercially used PE codend and 24 mm cover were identified, separately weighed, and classified as commercial and non-commercial. In addition, for red mullet (Mullus barbatus), hake (Merluccius merluccius), common pandora (Pagellus erythrinus), axillary sea bream (Pagellus acarne), annular sea bream (Diplodus annularis), and picarel (Spicare smaris), length measurements were taken to the nearest half centimeter, and percentages of by-catch, in terms of numbers of individuals, were calculated using Minimum Landing Size (MLS) or, if this was not defined, Length at First Maturity (LFM). Levels of by-catch for these species were also calculated in terms of weight, using length-weight relationships reported in the literature. The results showed that, on average, 63% (93 kg) of codend catch was composed of commercial species, while the rest, 37% (56 kg), was unmarketable species. Moreover, although they are commercial species, 5% of red mullet, 92% of hake, 32% of common pandora, and 33% of axillary sea bream were below MLS in terms of weight. In conclusion, it is stressed that the Aegean Sea demersal trawl fishery has a multi-species nature, its by-catch level is rather high, and therefore there is an urgent need for introducing more selective fishing practices.en_US
dc.identifier.endpage185en_US
dc.identifier.issn1300-0128
dc.identifier.issn1300-0128en_US
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage179en_US
dc.identifier.urihttps://hdl.handle.net/11454/38991
dc.identifier.volume30en_US
dc.identifier.wosWOS:000238191400005en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherScientific Technical Research Council Turkey-Tubitaken_US
dc.relation.ispartofTurkish Journal of Veterinary & Animal Sciencesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectThe Aegean Seaen_US
dc.subjectIzmir Bayen_US
dc.subjecttrawlen_US
dc.subjectdiscarden_US
dc.subjectby-catchen_US
dc.titleBy-catch in a 40 mm PE demersal trawl codenden_US
dc.typeArticleen_US

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