Length-weight relationships of teleost fish species caught in gillnets as non-target in the Southwest Marmara Sea



The mixed species can be caught together in the specific fishing gear at the same time. In the present study, 18 mm mesh size gillnets were used for catching Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) in the Southwest Marmara Sea. Although, Trachurus mediterraneus was targeted with these nets, 29 non-target species of teleost fish were caught and evaluated. The length-weight relationships of targeted Trachurus mediterraneus and 11 non-target species were calculated because of the number of individuals. A specific species is targeted with fishing gear, but non-target species are caught and population characteristics such as the length-weight relationships of these species are important for fisheries management. The length-weight relationships from non-target species Alosa immaculata Bennett, 1835, Boops boops (Linnaeus, 1758), Chromis chromis (Linnaeus, 1758), Serranus scriba  (Linnaeus, 1758) and Pagellus erythrinus (Linnaeus, 1758) were determined for the first time in the Marmara Sea in the present study. As a result, various fishing pressures, environmental disasters and hydrobiological effects necessitate the continuous investigation and monitoring of population characteristics, such as the length-weight relationships of species living in the Sea of Marmara.


Gillnets, Marmara Sea, Fisheries management, Length-weight relationships, Teleost fish

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