Catch Composition of Different Bottom Trawl Cod-ends in the Western Black Sea
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Istanbul Univ Press, Fac Aquatic Sciences
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Across the Mediterranean and the Black Sea, an improvement in technological adoption which op-timizes the environmental benefits of fisheries is needed. The testing of quality standards in trawl fishing is one of the essential components. In an experiment, we tested four bottom trawl cod-ends in the western Black Sea to determine the characteristics of the catch composition. Fishing trials were conducted by 40 mm diamond (40D), 44 mm diamond (44D), 40 mm square (the 40S), and 40 mm 90-degree turned (40T) mesh cod-ends for 31 bottom trawling hauls. The multivariate analysis of catch composition indicated a significantly higher differentiation between 40D and 40T cod-ends, mainly characterized by five species: Merlangius merlangus, Mytilus galloprovincialis, Trachinus dra-co, Mullus barbatus, and Uranuscopus scaber. The difference in the shape of cod-end meshes re-flected the variation in the catchability and catch composition. However, the 40S and 40T showed 80% similarity in catch composition. Among cod-ends, 40T yielded in lowest catch per unit effort for both commercial and other species. Adoption of gear specially made to catch more target species can help bottom trawl fisheries further improve their ecological and economic sustainability.
Açıklama
Anahtar Kelimeler
Black Sea, Bottom trawl, catch composition, cod-end, Demersal Trawl, Discards, Fishery, Selectivity, Coast, Size, Codends
Kaynak
Aquatic Sciences and Engineering
WoS Q Değeri
Q4
Scopus Q Değeri
Q4
Cilt
38
Sayı
1
