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Turkish Journal of Fisheries and Aquatic Sciences 2023, Vol 23, Num, 3     (Pages: TRJFAS22719)

Stock Assessment of Red Mullet, Mullus barbatus Linnaeus, 1758 by Length-based and Catch-based Models in the Northeastern Mediterranean

Savaş Kılıç 1 ,Süleyman Öztürk 1 ,Süleyman Sarıgöz 1 ,Serkan Erkan 1 ,Mahir Kanyılmaz 2 ,E. Mümtaz Tıraşın 3 ,Marcelo Vasconcellos 4 ,Stefano Lelli 5 ,Nazlı Demirel 6

1 Mediterranean Fisheries Research Production & Training Institute, Kepez Unit, 07192, Antalya, Türkiye.
2 General Directorate of Fisheries and Aquaculture, Ministry of Agriculture and Forestry, Ankara, Türkiye.
3 Institute of Marine Sciences and Technology, Dokuz Eylül University, İzmir, Türkiye
4 FAO Fisheries and Aquaculture Division, Viale delle Terme di Caracalla 00153 Rome, Italy
5 General Fisheries Commission for the Mediterranean – GFCM, Rome, Italy
6 Institute of Marine Sciences and Management, Istanbul University, Istanbul, Türkiye
DOI : 10.4194/TRJFAS22719 Viewed : 1824 - Downloaded : 741 Stock assessment for Mullus barbatus using catch-based (CMSY) and length based (LBB, LBSPR and LIME) data limited models were performed by using official catch statistics and commercial length frequency data from northeastern Mediterranean. The CMSY model results showed that the catch amount did not exceed MSY, and the fisheries reference points (B/BMSY and F/FMSY) indicated a healthy stock status in 2020. The LBB model results indicated that the biomass ratio was above safe biological limits (B<0.5 BMSY) but fishing mortality was slightly higher than natural mortality. Likewise, LBSPR results showed that SL50 for red mullet was higher than its Lm50, while the estimated median SPR was above the limit of 20% set as the biological reference point. The LIME results were more optimistic than those from the LBB and LBSPR and the estimated SPR was found above 40% which is the target reference point for a sustainable stock. According to the results of different assessment models, the red mullet stock was deemed sustainable in terms of biomass but observation of fishing pressure is required. Keywords : Data-poor fishery Demersal fish Fisheries management GSA 24