Length Based Assessments for European Pilchard Sardina pilchardus and European Anchovy Engraulis encrasicolus, in the İzmir Bay, Aegean Sea

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dc.authorscopusid6602228008
dc.authorscopusid57904870800
dc.authorscopusid55427203800
dc.contributor.authorTosunoğlu Z.
dc.contributor.authorMert Şenbahar A.
dc.contributor.authorDemirel N.
dc.date.accessioned2023-01-12T20:26:20Z
dc.date.available2023-01-12T20:26:20Z
dc.date.issued2023
dc.departmentN/A/Departmenten_US
dc.description.abstractIn the Mediterranean Sea, European pilchard Sardina pilchardus and European anchovy Engraulis encrasicolus are the most important small pelagic fish regarding their ecological role, and revenue. Here, we perform a comprehensive assessment of length-based methods for those small pelagics from İzmir Bay, Aegean Sea. Therefore, the Length-based Bayesian Estimator and Length-based Spawning Potential Ratio were used to evaluate the stock structure and status of two important small pelagic fish. The length range for Sardina pilchardus was from 7.1 cm to 17.3 cm in TL. The ratios Lmean/Lopt and Lc/Lc_opt were over 1, suggesting truncated length structure and fishing of not too small individuals. The proportion of mature individuals in the catch was far less than half (36%) suggesting that in these fisheries catch consists mostly of immature individuals. The length range for Engraulis encrasicolus was from 5 cm to 15 cm in TL. The ratios Lmean/Lopt and Lc/Lc_opt were over 1 (1.2 and 1.3, respectively), suggesting truncated length structure and fishing of large individuals. The proportion of mature individuals in the catch was over half (52%) suggesting that in these fisheries catch consists of adults. The estimated sizes at median 50% selectivity (SL50) for S. pilchardus (11.1 cm) was ?0.6 cm shorter than its lengths at 50% maturity (L50) of 11.7 cm, which indicates that a large proportion of the catch was immature. The median estimate of the spawning potential ratio was ?0.19 for S. pilchardus and ?0.48 for E. encrasicolus. © 2023, Central Fisheries Research Inst. All rights reserved.en_US
dc.description.sponsorshipEge Üniversitesi: 2017/SUF/002; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK: 118O317en_US
dc.description.sponsorshipThis study was funded by Ege University Scientific Research Project Coordination Unit (2017/SUF/002) and TUBİTAK (118O317).en_US
dc.identifier.doi10.4194/TRJFAS21901
dc.identifier.issn13032712
dc.identifier.issn1303-2712en_US
dc.identifier.issueSpecial Issue 3en_US
dc.identifier.scopus2-s2.0-85138709809en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.urihttps://doi.org/10.4194/TRJFAS21901
dc.identifier.urihttps://hdl.handle.net/11454/79982
dc.identifier.volume23en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCentral Fisheries Research Insten_US
dc.relation.ispartofTurkish Journal of Fisheries and Aquatic Sciencesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAnchovyen_US
dc.subjectData-limited fisheriesen_US
dc.subjectFisheries managementen_US
dc.subjectLength-frequencyen_US
dc.subjectSardineen_US
dc.subjectSpawning potential ratioen_US
dc.titleLength Based Assessments for European Pilchard Sardina pilchardus and European Anchovy Engraulis encrasicolus, in the İzmir Bay, Aegean Seaen_US
dc.typeArticleen_US

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