Affiliation:
1. Faculty of Marine Sciences and Technology, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
Abstract
Abstract
This study was conducted to determine the selectivity of hooks (galvanized, tin, carbon, nickel) used for Atlantic bonito (Sarda sarda Bloch, 1793) in the Gallipoli Peninsula and the Dardanelles during the 2015 and 2018 fishing seasons (spring and autumn). The Atlantic bonito was fished with hooks of size 1/0, 2/0, 3/0, and 4/0. A total of 604 bonitos were caught, including 201 individuals using a galvanized hook, 194 individuals using a tin hook, 158 individuals using a nickel hook and 51 individuals using a carbon hook. A lower catch was obtained with hooks of size 4/0 (42 in total). The highest catch (100 total) was obtained with hooks of size 1/0 and a lower catch (19 in total) was obtained with hooks of size 4/0 in the case of tin hooks. In the case of nickel hooks, the highest catch (63 in total) was obtained with hooks of size 1/0 and a lower catch (eight in total) was obtained with hooks of size 4/0. The optimum catch length and curve width were calculated in relation to the size of hooks. It was determined that all hooks used in the experiments catch below the length allowed for fishing. It was therefore concluded that the use of the largest hooks would be preferable, with size 4/0 being the most suitable for maintaining the continuity of the species.
Reference54 articles.
1. Akamca, A. (2004). Çapraz ve Düz igneli Dip Pareketalarında Avlama Etkinligi ve Tür Seçiciligi. Unpublished doctoral dissertation, University of Çukurova Üniversitesi, Adana, Turkey. (In Turkish).
2. Akyasan, E., Oztekin, A., Altınagac, U. & Ayaz, A. (2016). Effects of diferent feather colours in Chub mackerel Scomber japonicus Houttuyn, 1782) handline used at Gökçeada region on fishing eficiency. Marine Science and Technology Bulletin 5(1): 1–5.
3. Ates, C., Deval, C.M. & Bok, T. (2008). Age and growth of Atlantic bonito Sarda sarda bloch, 1793) in the Sea of Marmara and Black Sea, Turkey. Journal of Applied Ichthyology 24: 546–550.
4. Bacheler, N., Jeffrey, M. & Buckel, A. (2004). Does hook type influence the catch rate, size, and injury of grouper in a North Carolina commercial fishery Department of Zoology, Center for Marine Sciences and Technology, North Carolina State University, 303 College Circle, Morehead City, NC 28557, USA.
5. Bertrand, J. (1988). Selectivity of hooks in the handline fishery of the Saya de Malha Banks (Indian Ocean). Fish. Res 6: 249–255.