Catch Composition of Bottom Trawl Fisheries in Düzce Coast, southwestern Black Sea

Authors : Tuba ÖĞREDEN, Deniz YAĞLIOĞLU

Pages : 158-167

Doi:10.28978/nesciences.368342

View : 20 | Download : 12

Publication Date : 2017-11-30

Article Type : Research Paper

Abstract :This study was performed to identify the catch composition of Düzce coast insert ignore into journalissuearticles values(southwestern Black Sea); at depths of 30-110 meters by bottom trawl between September 2014 and August 2015. In the catch compositions of the Düzce coast, the abundance of the first, second and third species were Merlangius merlangus with 73.12% insert ignore into journalissuearticles values(1290.29 kg / km2 );, Gobius spp. with 9.30% insert ignore into journalissuearticles values(164.04 kg/km2 ); and Mullus barbatus with 9.05% insert ignore into journalissuearticles values(159.61 kg / km2);, respectively. The other 33 species make up 8.53% of total fish biomass. When seasonal distribution was examined, the total catch of fish were 1038.54, 2552.37, 1068.72, 5132.96 kg/km2 , of which economic insert ignore into journalissuearticles values(target); fish species insert ignore into journalissuearticles values(Merlangius merlangus); constitute 745.72, 1726.14, 724.58, 4910.15 kg/km2 in autumn, winter, spring and summer respectively. In this study, fishing a very high rate of discard whiting in little sizes draws the attention. Whiting constitutes 56% of discard. Single or sporadic captures were also recorded for Acipenser stellatus, Trachurus trachurus, Spicara smaris, Lophius piscatorius, Serranus hepatus and Hippocampus hippocampus. Moreover, in this study, red list status for 36 fish species belonging to 27 family in Düzce coasts were considered with the Red List published by the International Union for conservation of Nature and Natural Resources insert ignore into journalissuearticles values(IUCN);. As a result of this comparison, it was determined that 2 species Critically Endangered insert ignore into journalissuearticles values(CR);, 5 species Vulnerable insert ignore into journalissuearticles values(VU);, 22 species Least Concern insert ignore into journalissuearticles values(LC);, 4 species Not Evaluated insert ignore into journalissuearticles values(NE);, 2 species Data Deficient insert ignore into journalissuearticles values(DD);.
Keywords : Southwestern Black Sea, Düzce coast, Bottom Trawl, Catch Composition, Turkey