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Egyptian Journal of Aquatic Biology and Fisheries
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Volume Volume 29 (2025)
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Vu, N., Nguyen, K. (2025). A Comparison of Catch Rates of C-Hooks and J-Hooks in the Hook-and-Line Tuna Fishery. Egyptian Journal of Aquatic Biology and Fisheries, 29(2), 1205-1219. doi: 10.21608/ejabf.2025.418884
Nghiep Vu; Khanh Nguyen. "A Comparison of Catch Rates of C-Hooks and J-Hooks in the Hook-and-Line Tuna Fishery". Egyptian Journal of Aquatic Biology and Fisheries, 29, 2, 2025, 1205-1219. doi: 10.21608/ejabf.2025.418884
Vu, N., Nguyen, K. (2025). 'A Comparison of Catch Rates of C-Hooks and J-Hooks in the Hook-and-Line Tuna Fishery', Egyptian Journal of Aquatic Biology and Fisheries, 29(2), pp. 1205-1219. doi: 10.21608/ejabf.2025.418884
Vu, N., Nguyen, K. A Comparison of Catch Rates of C-Hooks and J-Hooks in the Hook-and-Line Tuna Fishery. Egyptian Journal of Aquatic Biology and Fisheries, 2025; 29(2): 1205-1219. doi: 10.21608/ejabf.2025.418884

A Comparison of Catch Rates of C-Hooks and J-Hooks in the Hook-and-Line Tuna Fishery

Article 75, Volume 29, Issue 2, March and April 2025, Page 1205-1219  XML PDF (742.23 K)
DOI: 10.21608/ejabf.2025.418884
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Authors
Nghiep Vu; Khanh Nguyenorcid
Abstract
      Harvesting oceanic tuna species has played a very important role in the social economic development, income, and livelihoods throughout the central provinces of Vietnam. The hook-and-line (handline) with artificial light using J-shape hooks (so-called J-hooks) is the primary fishing method used to catch the yellowfin (Thunnus albacares) and bigeye tuna (Thunnus obesus) in the South China Sea. However, this fishery has a challenge of incidental catch of sea turtles. This study investigated the catch comparisons of hook-and-line fishery using C-shape hooks (so-called C-hooks) versus conventional J-hooks in the purpose of reducing the incidental catch of sea turtles. Field experiments were conducted from February to May 2022 onboard the commercial fishing boat and showed that C-hooks caught the same amount of all species compared to the J-hooks. In addition, C-hooks caught larger yellowfin tuna than the J-hooks. Our results show that the use of C-hooks in hook-and-line fishery has the ecological and economic benefit in terms of endangered species protection and maintenance of catch rates of wanted species.
Keywords
C-hook; Bycatch reduction; Sea turtles; Handlines; Tuna fishery
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