The catch amount of Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) gillnets in the Sea of Marmara-Reference-Cited by-同舟云学术

The catch amount of Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) gillnets in the Sea of Marmara

Published:2024-07-15 Issue:2 Volume:26 Page:495-506
ISSN:1301-7985
Container-title:Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi
language:
Short-container-title:

Author:

Şen Yusuf¹^ORCID,Kalemli Ceyda¹^ORCID,Özekinci Uğur¹^ORCID

Affiliation:

1. Çanakkale Onsekiz Mart Üniversitesi

Abstract

The small-scale fishermen in the coastal area of the Marmara Sea between April and June caught the Mediterranean horse mackerel Trachurus mediterraneus (Steindachner, 1868) with gillnets. This target species, T.mediterraneus and significant amounts of non-target species are caught in these nets. So, the technical and structural characteristics of the gillnets for a commercial fishermen were determined and the target and non-target species were evaluated in catching operations. The multifilament gillnet mesh size of 18 milimeters polyamid, twine thickness of 210d/2, hanging ratio of 0.33 and the total length of approximately 200 meters. Also, guarding nets were added to gillnets. The total amount was determined as 397.8 kilograms (kg) and 9204 individuals (ind). The weight of T.mediterraneus was constituted 39.3% of the total weight. The in of T.mediterraneus was constituted 43.4% of the total ind. While the catch per unit effort (CPUE) for T.mediterraneus was calculated at 0.026 kg/m.operation-1 and 0.7 ind/m.operation-1, the CPUE for the total amount was calculated at 0.066 kg/m.operation-1 and 1.5 ind/m.operation-1. The total economic value was calculated at 15814.4 Turkish Liras (TL), which 9390 TL from T.mediterraneus and 6424.4 TL from non-target species. This study is important in terms of revealing for the first time the catch efficiency of gillnets used by commercial fishermen to catch T.mediterraneus in the coastal area of the Marmara Sea, which is an important fishing area. These results will contribute to the creation of management plans and fisheries management for species-specific fishing gear used in a region.

Publisher

Balikesir Universitesi Fen Bilimleri Enstitusu Dergisi

Reference36 articles.

1. Sinclair, M., and Valdimarsson, G., Responsible fisheries in the marine ecosystem in Cook, R., Impact of By-catch mortality by Fishing Gear, Food and Agriculture Organization of the United Nations, Rome, Italy, CABI Publishing, (2003).

2. Alverson, D. L., Freeberg, M. H., Murawski, S. A. and Pope, J. G., A global assessment of fisheries bycatch and discards, 339, Food and Agriculture Organization of the United Nation, Rome, Italy, 233 p, (1994).

3. Zeller, D., Cashion, T., Palomares, M. and Pauly, D., Global marine fisheries discards: A synthesis of reconstructed data, Fish and Fisheries, 19, 1, 30-39, (2018).

4. Tsagarakis, K., Palialexis, A. and Vassilopoulou, V., Mediterranean fishery discards: review of the existing knowledge. ICES Journal of Marine Science, 71, 5, 1219–1234, (2013).

5. Gillett, R., Global study of shrimp fisheries, 475, Food and Agriculture Organization of the United Nation Fisheries Technical Paper, 25-29, (2008).