An Overview of the Status of Sturgeons and Cetaceans Accidentally Captured in Southern Black Sea Coastal Zone of Türkiye

Authors : Süleyman ÖZDEMİR, Ercan ERDEM, Zekiye BİRİNCİ ÖZDEMİR

Pages : 411-422

Doi:10.33714/masteb.1327417

View : 89 | Download : 78

Publication Date : 2023-09-28

Article Type : Research Paper

Abstract :This study was conducted out in the southern Black Sea coastal zone, in 2011-2016 fishing seasons. In the study, bycatch of sturgeons and cetaceans were examined both in small scale insert ignore into journalissuearticles values(turbot gillnets); and large scale insert ignore into journalissuearticles values(trawlers); fisheries. During the fishing operations within the study, 66 sturgeons insert ignore into journalissuearticles values(41 Danube sturgeon - Acipenser gueldenstaedtii and 25 starry sturgeon - Acipenser stellatus); and 49 cetaceans insert ignore into journalissuearticles values(40 harbor porpoises - Phocoena phocoena relicta and 9 short beaked dolphin - Delphinus delphis ponticus); were captured. Length-weight relationships of Danube sturgeon and starry sturgeon were determined as W=0.0123L2.8808 insert ignore into journalissuearticles values(R=0.9964, negative allometric growth); and W=0.0345L2.5351 insert ignore into journalissuearticles values(R=0.9961, negative allometric growth);, respectively. Mean total length were calculated as 60.02±1.04 cm for Danube sturgeons, 46.42±1.17 cm for starry sturgeon and mean fork length were established as 126.75±3.36 cm for harbor porpoises, 163.74±1.42 cm for short beaked dolphins in the study.
Keywords : Accidental mortality, Acipenseridae, Black Sea, Delphinus delphis ponticus, Incidental catch, Phocoena phocoena relicta