Effects of square mesh panels position of bottom trawls on by-catch bluefish Pomatomus saltatrix (Linnaeus, 1776) selectivity in the Southern Coast of the Black Sea, Turkey

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dc.authoridOzdemir, Suleyman/0000-0002-2247-0703
dc.authoridERDEM, YAKUP/0000-0003-4754-0963
dc.authoridBirinci Ozdemir, Zekiye/0000-0002-7443-1298
dc.contributor.authorOzdemir, Suleyman
dc.contributor.authorErdem, Yakup
dc.contributor.authorErdem, Ercan
dc.contributor.authorOzdemir, Zekiye Birinci
dc.date.accessioned2025-03-23T19:48:12Z
dc.date.available2025-03-23T19:48:12Z
dc.date.issued2014
dc.departmentSinop Üniversitesi
dc.description.abstractThe selectivity parameters for by-catch bluefish Pomatomus saltatrix caught by demersal trawl, a nominal 40 mm diamond mesh size codend outfitted with square mesh escape panels, was determined on the southern coast of the Black Sea. Square mesh panels of nominal 36 mm were evaluated in two separate combinations: left-right and middle on the codend. The 50% retention lengths (L-50) and selection ranges of left-right (SDS), middle (DSD) combinations and control codend for blue fish were estimated to be 13.03 and 3.82 cm, 12.91 and 3.71 cm, 12.49 and 3.68 cm respectively. The L-50 value of SDS and DSD codend were comparable with the L-50 value of the control codend; however, the control codend value was rather low. The values of SDS and DSD codend weren't very close to MLS of the bluefish (20 cm). For this reason, more than 36 mm square mesh panels can be used alternatively, instead of the 36 mm square mesh panel on the codends for the fishery of the bluefish and higher size selectivity can be obtained. However, it may not be successful fisheries when considering the minimum landing size for dominant species (whiting Merlangius merlangus (Linnaeus, 1758) and red mullet Mullus barbatus ponticus (Essipov, 1927), 13 cm) in the Black Sea trawl fishery. These results show that increasing the size selectivity in a multi-species trawl fishery using a single position or square mesh size is quite difficult. Furthermore, square mesh panel codends were more selective than diamond mesh codend (p < 0.05). Differences between left-right (SDS) position and middle (DSD) position were no significant (p > 0.05) for the square mesh panel codend. Although the left-right (SDS) combination had a higher total area than the other combination (DSD) with square mesh in the middle and was preferable for bluefish.
dc.identifier.endpage321
dc.identifier.issn0007-9723
dc.identifier.issn2262-3094
dc.identifier.issue3
dc.identifier.scopus2-s2.0-84904658832
dc.identifier.scopusqualityQ3
dc.identifier.startpage315
dc.identifier.urihttps://hdl.handle.net/11486/7538
dc.identifier.volume55
dc.identifier.wosWOS:000342604600003
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherCahiers De Biologie Marine
dc.relation.ispartofCahiers De Biologie Marine
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectSquare Mesh Panel
dc.subjectSelectivity
dc.subjectBy-catch
dc.subjectBluefish Pomatomus saltatrix
dc.subjectDemersal Trawl
dc.subjectSwimming Behaviour
dc.titleEffects of square mesh panels position of bottom trawls on by-catch bluefish Pomatomus saltatrix (Linnaeus, 1776) selectivity in the Southern Coast of the Black Sea, Turkey
dc.typeArticle

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