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dc.contributor.authorDemirel, Nazlı
dc.contributor.authorSenbahar, A. Mert
dc.contributor.authorTosunoglu, Zafer
dc.date.accessioned2023-02-21T09:59:15Z
dc.date.available2023-02-21T09:59:15Z
dc.date.issued2023
dc.identifier.citationTosunoglu Z., Senbahar A. M., Demirel N., "Length based assessments for European pilchard Sardina pilchardus and European anchovy Engraulis encrasicolus, in the İzmir Bay, Aegean Sea", TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, cilt.23, sa.3, ss.1-8, 2023
dc.identifier.issn1303-2712
dc.identifier.othervv_1032021
dc.identifier.otherav_399e9263-c09e-4556-8752-1cd04adbbbd5
dc.identifier.urihttp://hdl.handle.net/20.500.12627/187980
dc.identifier.urihttps://avesis.istanbul.edu.tr/api/publication/399e9263-c09e-4556-8752-1cd04adbbbd5/file
dc.identifier.urihttps://doi.org/10.4194/trjfas21901
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 S. 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 E. 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.
dc.language.isoeng
dc.subjectYaşam Bilimleri
dc.subjectTemel Bilimler
dc.subjectMultidisipliner
dc.subjectBalıkçılık
dc.subjectDeniz Biyolojisi
dc.subjectHidrobiyoloji
dc.subjectBİYOLOJİ
dc.subjectÇOK DİSİPLİNLİ BİLİMLER
dc.subjectBiyoloji ve Biyokimya
dc.subjectDoğa Bilimleri Genel
dc.subjectYaşam Bilimleri (LIFE)
dc.subjectTemel Bilimler (SCI)
dc.titleLength based assessments for European pilchard Sardina pilchardus and European anchovy Engraulis encrasicolus, in the İzmir Bay, Aegean Sea
dc.typeMakale
dc.relation.journalTURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES
dc.contributor.departmentİstanbul Üniversitesi , Deniz Bilimleri Ve İşletmeciliği Enstitüsü , Deniz Bilimleri Ve İşletmeciliği Bölümü
dc.identifier.volume23
dc.identifier.issue3
dc.identifier.startpage1
dc.identifier.endpage8
dc.contributor.firstauthorID4245945


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