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General characteristics of bottom trawl fishery and effect of haul duration and total catch on discard in the Western Black Sea

Bu calismada, Bati Karadeniz dip trol balikciliginin genel karakteri ile cekim suresi, hedef, iskarta ve toplam av miktari gibi bazi parametreler arasi iliskiler regresyon ve korelasyon analizi ile incelenmistir. Calisma verileri Igneada ve Rumeli Feneri bolgelerinde 2012-2014 yillari arasinda 66 gecerli dip trol cekiminden elde edilmistir. Sonuc olarak 2010-2014 yillari arasinda dip trol balikcilarinin denize ciktiklari gun sayisi 99 ile 167 arasinda degistigi tespit edilmistir. Cekim suresi arttikca toplam av artarken iskarta av miktari da artmaktadir. Karadeniz demersal kaynaklarinin surdurulebilir kullaniminin saglanmasi icin yalnizca karaya cikan av uzerinden duzenlemeler yapmak yerine balikcilik girdi kontrollerinin de (denize cikilan gun sayisi ve cekim suresi gibi) balikcilik yoneticileri tarafindan planlanmasi gerekmektedir.

From Ocean to Farm: Capture-Based Aquaculture of Bluefin Tuna in the Eastern Mediterranean Sea

Abstract Atlantic bluefin tuna (ABFT) fattening activities began in the eastern Mediterranean (Cyprus, Greece, and Turkey) in 2002. The total potential production is estimated at 11,240 tons. However, the actual production fluctuates depending on catch quota. ABFT farming in the region uses traditional methods of catching tuna with purse seiners and transferring them to grow-out cages, where they are fed small pelagic fishes until they reach the size and fat level required by the high-end market. ABFT farming in the region has had some conflicts with other human activities such as tourism. The boom in tuna farming in the Mediterranean over a relatively short period of time has caused overfishing, which in turn has led to a decreasing spawning stock. The ABFT has disappeared from the Black Sea, and their spawning ground in the eastern Mediterranean needs to be regulated and protected to ensure the long-term sustainability of the stock. Illegal, Unreported and Unregulated (IUU) fishing practices should be strictly regulated by the International Commission for the Conservation of Atlantic Tunas (ICCAT) members and nonmember countries. The development of hatchery and sustainable aquaculture technologies will decrease the pressure on wild stocks and in the future may enable stock enhancement, mitigating overfishing, and decreasing the high market price of the ABFT in the eastern Mediterranean and elsewhere.