Catch Composition of Bottom Trawl Fisheries in Düzce Coast, southwestern Black Sea
Journal Title: Natural and Engineering Sciences - Year 2017, Vol 2, Issue 3
Abstract
This study was performed to identify the catch composition of Düzce coast (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% (1290.29 kg / km2 ), Gobius spp. with 9.30% (164.04 kg/km2 ) and Mullus barbatus with 9.05% (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 (target) fish species (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 (IUCN). As a result of this comparison, it was determined that 2 species Critically Endangered (CR), 5 species Vulnerable (VU), 22 species Least Concern (LC), 4 species Not Evaluated (NE), 2 species Data Deficient (DD).
Authors and Affiliations
Tuba Öğreden, Deniz Yağlıoğlu
Keywords
Related Articles
- EP ID EP307882
- DOI 10.28978/nesciences.368342
- Views 135
- Downloads 0
The second record of the Seychelles dragonet Synchiropus sechellensis in the Northeastern Mediterranean coasts of the Turkey
Two female and one male specimens of the Seychelles dragonet Synchiropus sechellensis were caught by a commercial trawl at a depths of about 55-65 m on 04 November 2017 from the Aydıncık coast, Turkey. The present paper...
Artificial Intelligence (AI) Studies in Water Resources
Artificial intelligence has been extensively used in many areas such as computer science, robotics, engineering, medicine, translation, economics, business, and psychology. Various studies in the literature show that the...
Determination of Heavy Metal Concentrations in Lessepsian Suez Puffer (Lagocephalus suezensis Clark and Gohar, 1953) from North-Eastern Mediterranean
In the present study, the heavy metal concentrations in different organs (skin and muscle tissue) were studied in Lessepsian suez puffer (Lagocephalus suezensis Clark and Gohar, 1953) collected from Iskenderun Bay, North...
Haar wavelet collocation method for the approximate solutions of Emden-Fowler type equations
This paper investigates the Haar wavelet collocation method (HWCM) to obtain approximate solution of the linear Emden-Fowler type equations. To show the efficiency and accuracy of the proposed method, some problems are s...
First Indo-Pacific fish species from the Black Sea coast of Turkey: Shrimp scad Alepes djedaba (Forsskål, 1775) (Carangidae)
One specimen of shrimp scad Alepes djedaba (Forsskål, 1775) was caught by using fish net at a depth of 30 m on 11 October 2017 from Sinop Bay, the West Black Sea. With the present study, A. djedaba is first lessepsian fi...