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

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 (turbot gillnets) and large scale (trawlers) fisheries. During the fishing operations within the study, 66 sturgeons (...

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Bibliographic Details
Published in:Marine Science and Technology Bulletin
Main Authors: ÖZDEMİR, Süleyman, ERDEM, Ercan, BİRİNCİ ÖZDEMİR, Zekiye
Format: Article in Journal/Newspaper
Language:English
Published: Adem Yavuz SÖNMEZ 2023
Subjects:
Accidental mortality;Acipenseridae;Black Sea;Delphinus delphis ponticus;Incidental catch;Phocoena phocoena relicta
Fisheries Management
Balıkçılık Yönetimi
Phocoena phocoena
Turbot
Online Access:https://dergipark.org.tr/tr/pub/masteb/issue/80100/1327417
https://doi.org/10.33714/masteb.1327417
Description
Summary: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 (turbot gillnets) and large scale (trawlers) fisheries. During the fishing operations within the study, 66 sturgeons (41 Danube sturgeon - Acipenser gueldenstaedtii and 25 starry sturgeon - Acipenser stellatus) and 49 cetaceans (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 (R=0.9964, negative allometric growth) and W=0.0345L2.5351 (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.

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