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Abstract

This paper analyses the operational efficiency and economic performance of the circle hook and the J-hook, commonly used by traditional fishers in the demersal longline fishery of the Sultanate of Oman. A longline experiment was conducted at three fishing locations at Masirah Island of Al-Sharqiyah Governorate.  A total of 6,120 baited J-hooks and circle hooks were deployed over a 17-day period. The findings from this experimental research suggest that the overall performance (measured under various operational yardsticks such as hooking status and location, catch composition and quality, catching efficiency, and time and cost efficiency) of the circle hook is better than its counterpart. The results also indicate that the use of circle hooks has the potential to yield better financial returns. It is acknowledged that the reliance on three fishing locations may restrict the scientific generalizations. However, it is hoped that the results from this study will provide insight into the design of future experiments to ensure the validity of the present results and make effective regulatory decisions.

Keywords

J-hooks Circle hooks long line fisheries performances efficiency

Article Details

How to Cite
Al-Qartoubi, I. A., Bose, S., Al-Masroori, H. S., & Govender, A. (2019). Circle hook versus J-hook: A case study of the Sultanate of Oman. Journal of Agricultural and Marine Sciences [JAMS], 23, 29–39. Retrieved from https://journals.squ.edu.om/index.php/jams/article/view/2343

References

  1. Al-Masroori H, Al-Oufi H, McIlwain JL, McLean E. 2004. Catches of lost fish traps (Ghost fishing) from fishing grounds near Muscat, Sultanate of Oman. Fisheries Research 69: 407-414.
  2. Bach P, Dagorn L, Misselis C. 2000. The role of bait type on pelagic long line efficiency, ICES, Copenhagen (Denmark). p.16.
  3. Bjordal A. 2002. The use of technical measures in responsible fisheries: regulation of fishing gear. In: Cochrane KL, editor. A fishery manager’s guidebook. Management measures and their application. FAO Fisheries Technical Paper. No. 424. Rome, FAO. 231p.
  4. Bjordal A, Lokkeborg S. 1996. Longlining, Fishing News Books, Osney Mead, Oxford, England.
  5. Bjordal A. 1988. Recent developments in longline fishing: catching performance and conservation aspects, Institute Fisheries Technical Research. pp. 19-23.
  6. Cai J, Leung PS, Pan M, Pooley S. 2005. Economic linkage impacts of Hawaii’s longline fishing regulations, Fisheries Research 74: 232–42.
  7. Clarke M, Borges R, Stokes D. 2002. Comparisons of trawl and longline catches of deep water Elasmobranches West and North of Ireland, Scientific council meeting, NAFO SCR. Doc. 02/27, Serial No. N 4749.
  8. Cooke SJ, Suski CD. 2004. Are circle hooks an effective tool for conserving marine and freshwater recreational catch and release fisheries?, Aquatic Conservation, University of British Columbia, Marine Freshwater Eco-systems 14: 299-326.
  9. Ducrocq M. 2004. A 6,000 km2 coastal sanctuary for sharks and rays in Mauritania, West Africa, Fondation Internationale du Banc d'Arguin, France, Shark News, p. 15, http://128.227.186.212/fish/organizations/ssg/sharknews/sn16/sn16.pdf, accessed 28 October 2006.
  10. Garry L, Preston GL, Mead PD, Chapman LB, Taumaia P. 1999. Deep-bottom fishing techniques for the Pacific Islands: A manual for fishermen, Secretariat of the Pacific Community, Print, New Zealand.
  11. Grover AM, Mohr M, Plamer-Zwahlen M. 2002. Hook- and- release mortality of Chinook salmon from drift mooching with circle hooks: Management implications for California’s ocean sport fishery, In: Lucy, JA, Studholme AL, editor. 2002. Catch and release in marine recreational fisheries, American Fisheries Society Symposium 30: 39-56.
  12. Halliday R, Kenchington TJ. 1993. Size selection of ground fish longline gear, Project Summary. Fisheries and Ocean, Scotia-Fundy Region, Halifax, Nova Scotia, No. 40, p. 5.
  13. Hareide NR. 1995. Comparison between longlining and trawling for deep water species selectivity, quality and catchability- A review. In: Hopper AG, editor. deep water fisheries of the North Atlantic Slope, pp. 227-234.
  14. He X, Bigelow KA, Boggs CH. 1997. Cluster analysis of longline sets and fishing strategies within the Hawaii-based fishery, Fisheries Research 31: 147-158.
  15. ICES. 1977. Report of the working group on standardisation of scientific methods for comparing the catching performance of different fishing gear, Cooperative research report No. 66, International Council for the Exploration of the Sea Charlottelund slot, DK-2920 Charlottenlund, Denmark, pp. 16.
  16. Johannessen T, Ferno A. Lokkeborg S. 1993. Behaviour of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in relation to various sizes of long-line bait, ICES, Marine Science Symposia 196: 47-50.
  17. Kihedu KJ, Mlay MKL, Mwambungu JA, Ngatunga B.P. 2001. Proceedings Drifting Long Line, A Potential Fishing Method for the Northern Part of Lake Nyasa/Malawi/Niassa, Tanzania Fisheries Research Institute, Kyela Centre, East Africa, Lake Malawi Fisheries Management Symposium.
  18. Lokkeborg S, Bjordal A. 1992. Species and size selectivity in longline fishing, a review, Fisheries Research 13: 311–322.
  19. Lukacovic R, Uphoff J. 2002. Hook location, fish size and season as factors influencing catch and release mortality of striped bass caught with bait in Chesapeake Bay. In: Lucy JA, Studholme AL, editor. Catch and Release in Marine Recreational Fisheries, American Fisheries Society Symposium, vol. 30, pp. 97-100.
  20. Martian WR, McCracken FD. 1954. Relative efficacy of baits for groundfish, Program Report Atlanta Biological Sta. 126: 17-20.
  21. MAF. 2002. Longline fishery in Oman, Ministry of Agriculture and Fisheries, Sultanate of Oman, Unpublished report.
  22. MAF. 2013. Fisheries Statistics Book for 2013, Directorate general of planning and development, Ministry of Agriculture and Fisheries, Sultanate of Oman.
  23. MNE. 2004. Selected Data and Indicators from (1993 & 2003) Censuses, Census Administration, Ministry of National Economy, Sultanate of Oman.
  24. MNE. 2007. Seventh five-year development plan 2006-2010, Ministry of National Economy, Ministry of National Economy, Sultanate of Oman.
  25. Muoneke MI, Childress WM. 1994. Hooking mortality: a review for recreational fisheries, Reviews in Fisheries Science 2: 123-156.
  26. Pajot G, Weerasooriya KT. 1980. Fishing trials with bottom set longlines in Sri Lanks, Food and Agriculture Organisation of the United Nations, Development of Small-Scale Fisheries in the Bay of Bengal, Madras, India.
  27. Radcliffe C. 2005. Fishing system technologist: a handbook for fisheries extension workers, Ministry of Agriculture and Fisheries, Sultanate of Oman, p.181.
  28. Serafy JE, Cooke SJ, Diaz GA, Graves JE, Hall M, Shivji M. Swimmer Y. 2012. Circle hooks in commercial, recreational, and artisanal fisheries: Research status and needs for improved conservation and management, Bulletin of Marine Science 88(3): 371-391.
  29. Skomal GB, Chase BC, Prince ED. 2002. A comparison of circle hook and straight hook performance in recreational fisheries for juvenile Atlantic Bluefin Tuna, In: Lucy JA, Studholme AL, editor. 2002. Catch and release in marine recreational fisheries, American Fisheries Society Symposium 30: 57-65.
  30. Skud BE, Hamley JM. 1978. Factors affecting longline catch and effort: II. Hook spacing, International Pacific Halibut Commission Scientific Report 64: 15-24.
  31. Stengel H,. Al-Harthy A. 2001. First investigation about the efficiency of bottom longlining in the EEZ of the Sultanate of Oman (Masirah Area), Ministry of Agriculture and Fisheries, Unpublished report.
  32. Thomas RG, Boudreaux C, Lightner J, Lear E, Hebert V. 1997. Hook release mortality of red drum and spotted sea trout. Abstract in the 1997, Southern Division American Fisheries Society Midyear Meeing, San Antonio, TX.
  33. Trumble RJ, Kaimmer SM, Williams GH. 2002. A review of the methods used to estimate, reduce, and manage bycatch mortality of pacific halibut in the commercial longline ground fish fisheries of the Northeast pacific, In: Lucy JA, Studholme AL, editor. 2002. Catch and release in marine recreational fisheries, American Fisheries Society Symposium 30: 88-96.