Ecosystem Effects of the Commercial Scorpion-Fish Nets Used in Ordu Region
Journal Title: Turkish Journal of Maritime and Marine Sciences - Year 2015, Vol 1, Issue 1
Abstract
In this study, the effect of trammel nets used for the scorpion-fish in the Black Sea Region on the other species is investigated. These nets are used on the rocky bottoms which are very important for the ecosystem. This study was carried in 2014 on the coasts of Ordu. In this research, commercial bottom trammel nets having a length of 50m with 44mm, 50mm, 56mm and 60mm mesh sizes were used. A monthly sampling routine was performed. During this research a total of 22 species were caught by the scorpionfish nets. 43.38 % of the total catch by these nets is the target species (scorpionfish), 32.56 % are crab species, 18.79 % are other fishes and 5.28 % are Mollusca species. Crab species constitute a considerable amount of species having no economic importance. Within the period of scorpion-fish season (May-August), the distribution of the total catch by nets is formed as; 48.63 % are crab species and 51.37 % are other species including the target one (scorpion-fish). As a result, it is shown that the by catch percentage of scorpion-fish nets is considerably high and the commercial scorpion-fish nets has a negative impact on the crab populations.
Authors and Affiliations
Mehmet AYDIN, Uğur KARADURMUŞ, Seda KONTAŞ
Keywords
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