Stock Assessment of Atherina BoyeriRisso, 1810 Using Two Different Methodological Approaches (length-based VPAand Catch-only CMSY), in a Freshwater Ecosystem
In: Thalassas: An International Journal of Marine Sciences, Jg. 39 (2023-10-01), Heft 2, S. 1015-1025
Online
serialPeriodical
Zugriff:
In this study, stock of the Atherina boyeriRisso, 1810 in habit İznik Lake was assessed using two different methodological approaches (length-based VPAand catch-only CMSY). A special rigged beach seine (with 6 mm codend mesh size) was used in the sampling process. Fishing trials were carried out 4 different stations of lake between March-2014 and February-2015 with monthly period so as to generating of the length frequency (LFQ) data. TropFishRpackage was used for analyzing of the LFQdata with bootstrapped ELEFAN Iprocess in the VPA. A total of 2938 fish were measured in the study. A 21-year-old official catch data was used in CMSYanalysis. Growth parameters L∞, K,and towere estimated as 14.21 cm, 0.52 yr−, -0.3 for female; 13.82 cm, 0.55 yr−, -0.37 for male and 14.26 cm, 0.52 yr−, -0.39 for both sexes respectively. Total mortality coefficient (Z), natural mortality (M) and fishing mortality (F) were estimated as 3.57 yr−, 1.04 yr−and 2.53 yr−respectively. VPAbased biological reference points Fmax, F05, F01,and SPRwere estimated as 1.09, 0.48, 0.67 and 0.11 respectively. CMSYbased reference points FMSY, MSY, BMSY, Fwere computed as 0.382, 1.987, 5.079 and 0.511 respectively. Overexploitation was determined on the A. boyeristock using of the both VPA (F/Fmax> 1)and CMSY (F/FMSY> 1). Fishing pressure should be decrease for sustainability of the A. boyeri’sstock in İznik Lake.
Titel: |
Stock Assessment of Atherina BoyeriRisso, 1810 Using Two Different Methodological Approaches (length-based VPAand Catch-only CMSY), in a Freshwater Ecosystem
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Autor/in / Beteiligte Person: | Cilbiz, Mehmet ; Uysal, Rahmi |
Link: | |
Zeitschrift: | Thalassas: An International Journal of Marine Sciences, Jg. 39 (2023-10-01), Heft 2, S. 1015-1025 |
Veröffentlichung: | 2023 |
Medientyp: | serialPeriodical |
ISSN: | 0212-5919 (print) ; 2366-1674 (print) |
DOI: | 10.1007/s41208-023-00571-4 |
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