- Volume 47 Issue 3
DOI QR Code
Sinking depth of tuna longlines related to mainline materials in the North Pacific Ocean
북태평양 중부공해에서 조업하는 다랑어연승어구의 모릿줄 재질에 따른 침강수심
- Jo, Hyun-Su (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
- Hwang, Seon-Jae (Korea Fisheries Resources Agency) ;
- Lee, Ji-Hoon (Institute of Low-Carbon Marine Production Technology, Pukyong National University) ;
- An, Doo-Hae (Cetacean Research Institute, National Fisheries Research & Development Institute) ;
- Moon, Dae-Yeon (Fisheries Resources Management Division, National Fisheries Research & Development Institute)
- 조현수 (국립수산과학원 서해수산연구소 자원환경과) ;
- 황선재 (수산자원사업단) ;
- 이지훈 (부경대학교 저탄소해양생산기술연구소) ;
- 안두해 (국립수산과학원 고래연구소) ;
- 문대연 (국립수산과학원 자원관리과)
- Received : 2011.04.14
- Accepted : 2011.08.02
- Published : 2011.08.31
The purpose of this paper is to provide useful information for fishermen in the manner of investigation a sinking speed of current type tuna longline gear at the North Pacific Ocean as a new developed tuna longline fishing ground. The sinking depth of mainline in connection with different basket was investigated. The experiments were also performed with different materials such as Supermansen (i.e., PE) and Hitech (i.e., PA) for the mainline to investigate the sinking depth of mainline and hooks. Furthermore, the relation between the sinking depth of hooks and catches are investigated also. The sinking depth of mainline at the first and the last shooting basket shows deeper than that of middle part of a basket due to reduced shortening ratio. The sinking depth of mainline and hook with Hitech material shows more shallow than that of Supermanse material, even the Hitech case was designed to sink deeper than that of Supermanse case. The highest catches arise at the middle part basket as the hook number 7 with around 248m sinking depth. From the results, longline with Hitech material is needed to increase the sinking force for reaching the relevant sinking depth. Moreover, the current strength at the North Pacific Ocean will be considered for further commercial fishing.
Supported by : 국립수산과학원
- Anderson, S. and B. McArdle, 2002. Sink rate of baited hooks during deployment of a pelagic longline from a New Zealand fishing vessel. New Zealand Journal of Marine and Freshwater Research, 36, 185-195. https://doi.org/10.1080/00288330.2002.9517079
- Beverly, S., D. Curran, M. Musyl and B. Molony, 2009. Effects of eliminating shallow hooks from tuna longline sets on target and non-target species in the Hawaii-based pelagic tuna fishery. Fisheries Research, 96, 281-288. https://doi.org/10.1016/j.fishres.2008.12.010
- Bigelow, K., M.K. Musyl, F. Poisson and P. Kleiber, 2006. Pelagic longline gear depth and shoaling. Fisheries Research, 77, 173-183. https://doi.org/10.1016/j.fishres.2005.10.010
- Bjordal, A. and S. Lokkeborg, 1996. Longlining. Fishing News Books Ltd., pp. 155.
- Brothers, N.P., J. Cooper and S. Lokkeborg, 1999. The incidental catch of seabirds by longline fisheries: Worldwide review and technical guidelines for mitigation. FAO Fisheries Circular No. 937, 1-101.
- Kim, D.A., 1999. Design of fishing gears III. Pyunghwa Press, pp. 345.
- Kim, S.S., D.Y. Moon, D.H. An, S.J. Hwang, Y.S. Kim, K. Bigelow and D. Curran, 2008. Effectd of hook and bait types on bigeye tuna catch rates in the tuna longline fishery. Kor. J. Ichthyol., 20 (2), 105-111.
- Lee, J.H., C.W. Lee and B.J. Cha, 2005. Dynamic simulation of tuna longline gear using numerical methods. Fisheries Science, 71, 1287-1294. https://doi.org/10.1111/j.1444-2906.2005.01095.x
- Lee, J.H. and L. Karlsen, 2005. Longline fishery in Norway. The Development and Evaluation of Maritime Technologies (DEMaT′05), 4, 183-190.
- Liuxiong, X., S. Liming, G. Panfeng, J. Wenxin and W. Jiaqiao, 2006. Catch rate comparison between circle hooks and ring hooks in the tropical high seas of the Indian Ocean based on the observer data. Indian Ocean Tuna Commission, WPTT-12, 1-6.
- Lokkeborg, S. and P. Teresa, 1997. Effects of setting time, setting direction and soak time on longline catch rates. Fisheries Research, 32, 213-222. https://doi.org/10.1016/S0165-7836(97)00070-2
- Melvin, E.F., 2000. Streamer lines to reduce seabird bycatch in longline fisheries. Washington Sea Grant, 1-2.
- Melvin, E.F. and N. Walker, 2008. Optimizing tori line designs for pelagic tuna longline fisheries. Report of work under New Zealand Ministry of Fisheries Special Permit 355. 1-17.
- Miyamoto, Y., K. Uchida, R. Orii, Z. Wen, D. Shiode and T. Kakihara, 2006. Three-dimensional underwater shape measurement of tuna longline using ultrasonic positioning system and ORBCOMM buoy. Fisheries Science, 72, 63-68. https://doi.org/10.1111/j.1444-2906.2006.01117.x
- NFRDI, 2008. Experimental survey of tuna loneline fishing grounds in the North Pacific Ocean. NFRDI, Busan, Korea, pp. 376.
- Roden, G.I., 1975. On North Pacific temperature salinity, sound velocity fronts, and their relation to the wind and energy flux fields. J. Phys. Oceanogr., 5, 557-571. https://doi.org/10.1175/1520-0485(1975)005<0557:ONPTSS>2.0.CO;2
- Shiode, D., F. Hu, M. Shiga, K. Yokota and T. Tokai, 2005. Midwater float system for standardizing hook depths on tuna longlines to reduce sea turtle bycatch. Fisheries Science, 71, 1182-1184. https://doi.org/10.1111/j.1444-2906.2005.01080.x
- Smith, N.W.M., 2001. Longline sink rate of an autoline vessel, and notes on seabird interactions. Science for Conservation 183, 1-32.
- Catch characteristics of the Korean tuna longline fishery in the Atlantic ocean vol.50, pp.4, 2014, https://doi.org/10.3796/KSFT.2014.50.4.556