Selectivity of conventional and alternative codend design for five fish species in the Aegean Sea

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dc.contributor.authorTokac, A.
dc.contributor.authorOzbilgin, H.
dc.contributor.authorKaykac, H.
dc.date.accessioned2019-10-27T21:17:20Z
dc.date.available2019-10-27T21:17:20Z
dc.date.issued2010
dc.departmentEge Üniversitesien_US
dc.description.abstractP>Currently, traditional Mediterranean trawls are generally made with non-selective netting and the fishing boats are involved in multi-species fisheries. As a result, most near-shore stocks are over-exploited. Weather permitting, the demersal trawl fleet tends to fish in relatively deeper, international waters of the Aegean Sea, where the catch is usually higher. Therefore, the need for evaluation of the codends used in this fishery and the potential improvements to their selectivity are of prime importance. In the present study, selectivity data were collected for hake (Merluccius merluccius), blue whiting (Micromesistius poutassou), greater forkbeard (Phycis blennoides), blackbelly rosefish (Helicolenus dactylopterus dactylopterus) and fourspotted megrim (Lepidorhombus boscii) in commercial (300 MC) and square mesh top panel (SMTPC) codends. Trawling was carried out at depths of 274-426 m onboard a commercial vessel chartered for a 15-day sea trial in August 2004. Selection parameters were obtained by fitting a logistic equation using a maximum likelihood method. Results of the selectivity analysis indicated that the commercially used 40 mm nominal mesh size PE codend was rather unselective for the species investigated in this study. In general, the square mesh top panel codend has relatively higher L(50) values than the commercial codend. However, except for blue whiting, even this codend is rather unselective when 50% maturity lengths (L(M50)) are considered.en_US
dc.description.sponsorshipCommission of the European UnionEuropean Union (EU) [NECESSITY/501605]en_US
dc.description.sponsorshipThe authors wish to thank the captain and crew of the commercial trawler 'Niyazi Reis'. Thanks are also extended to Z. Tosunolu, M. Bilecenolu, S. Leblebici, I. Aydin, O. Soykan and our Greek colleagues G. Petrakis and A. Chilary for participating in the sea trials. Thanks also to R. Holst for guidance with the stacked haul analysis method. This study was financed by the Commission of the European Union (NECESSITY/501605). The paper, however, does not reflect the commission's view and does not anticipate its future policy with regard to this area.en_US
dc.identifier.doi10.1111/j.1439-0426.2009.01379.x
dc.identifier.endpage409en_US
dc.identifier.issn0175-8659
dc.identifier.issn0175-8659en_US
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage403en_US
dc.identifier.urihttps://doi.org/10.1111/j.1439-0426.2009.01379.x
dc.identifier.urihttps://hdl.handle.net/11454/43806
dc.identifier.volume26en_US
dc.identifier.wosWOS:000277412200004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWiley-Blackwellen_US
dc.relation.ispartofJournal of Applied Ichthyologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titleSelectivity of conventional and alternative codend design for five fish species in the Aegean Seaen_US
dc.typeArticleen_US

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