Selectivity of commercial compared to larger mesh and square mesh trawl codends for four fish species in the Aegean Sea

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dc.contributor.authorOzbilgin, H.
dc.contributor.authorTokac, A.
dc.contributor.authorKaykac, H.
dc.date.accessioned2019-10-27T21:44:42Z
dc.date.available2019-10-27T21:44:42Z
dc.date.issued2012
dc.departmentEge Üniversitesien_US
dc.description.abstractDifferences in size selectivity of commercial (40 mm diamond mesh, 40D), larger mesh (48 mm diamond mesh, 48D), and square mesh codends (40 mm square mesh, 40S) for hake (Merluccius merluccius), greater forkbeard (Phycis blennoides), blackbelly rosefish (Helicolenus dactylopterus dactylopterus) and four-spot megrim (Lepidorhombus boscii) were investigated in the Aegean Sea. The study was conducted using the covered codend method. Data were analysed taking between-haul variations into account. Results showed that changing from a 40D to 48D codend significantly improved mean L50 values, with increases of about 22% for hake, 8% for greater forkbeard, 20% for blackbelly rosefish, and 11% for four-spot megrim (P = 0.000). A change from diamond to square mesh configuration with the same 40 mm netting also significantly increased the mean L50 values, with 45% for hake, 36% for greater forkbeard, and 25% for blackbelly rosefish (P = 0.000). For four-spot megrim the mean L50 value was about 10% lower, but this difference was statistically insignificant (P > 0.05). Despite the increases in L50 values, this study concludes that the selectivity of the 48D and 40S codends is still not sufficient to release fish smaller than length at first maturity for these four species.en_US
dc.description.sponsorshipCommission of the European UnionEuropean Union (EU) [NECESSITY/501605]en_US
dc.description.sponsorshipThe authors would like to thank the captain and crew of the commercial trawler "Niyazi Reis''. Thanks are also due Dr. Z. Tosunoglu, Dr. C. Aydin, Dr. G. Gokce, S. Leblebici, I. Aydin, and O. Soykan for participating in the sea trials. This study was financed by the Commission of the European Union (NECESSITY/501605).en_US
dc.identifier.doi10.1111/j.1439-0426.2011.01916.x
dc.identifier.endpage59en_US
dc.identifier.issn0175-8659
dc.identifier.issn0175-8659en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage51en_US
dc.identifier.urihttps://doi.org/10.1111/j.1439-0426.2011.01916.x
dc.identifier.urihttps://hdl.handle.net/11454/47284
dc.identifier.volume28en_US
dc.identifier.wosWOS:000299073500010en_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 commercial compared to larger mesh and square mesh trawl codends for four fish species in the Aegean Seaen_US
dc.typeArticleen_US

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