Browse > Article
http://dx.doi.org/10.3796/KSFT.2006.42.2.078

Octopus fisheries in the coastal waters of Gangneung- II - Octopus drift-line fishery -  

An, Young-Il (Dept. of marine industry, Gangwon Provincial College)
Park, Jin-Young (Dept. of marine industry, Gangwon Provincial College)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.42, no.2, 2006 , pp. 78-85 More about this Journal
Abstract
A survey on the fishing gear for octopus drift-line fishing was done in Gangwon-do, Sacheon, Gyeongnam and Hokkaido, Japan, while a survey on the environments of fishing grounds used data from January to August from the Korea east coast farming forecast system of Donghae Fisheries Research and Development Institute. The present situation of fishing was examined with boats engaging in drift-line fishing from March to August in the coastal waters along Gangneung. The fishing tackle for octopus drift-line fishing was made manually, and the size, shape, and weight of the hook and number of shooting used vary according to the fishing time and region. Lead is used as the material for sinkers. As bait, pork fat with skin is mostly used in Gangwon-do. The temperature of the bottom water layer in the coastal fishing ground of Gangneung from April to June ranges from $3.2-12.4^{\circ}C$, which is the optimal temperature for octopuses. During July and August, the temperature ranges from $5.0-20.6^{\circ}C$. The maximum difference between day and night temperatures reached up to $9.2^{\circ}C$. Salinity is generally stable at $33.2-35.324.6%_{\circ}$, which does not affect the inhabitation of octopuses. The octopus catch reached its peak from May to July, while most octopuses weighed less than 1 kg (76.7%). The results show that it is effective to carry out octopus drift-line fishing up to a depth of 40 meters; and that the maximum number of octopuses per line is obtained with an operation time of six hours.
Keywords
Octopus drift-line; Catch; Water temperature; Salinity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 An, Y.I. and J.Y. Park, 2004. The present condition and problems of the coastal octopus fishery of Gangwon province in Korea. Proceedings of the 4th JapanKorea joint seminar on fisheries sciences. Dec. 15-16, 2004. Sapporo, Japan, 75 - 81
2 Choe, B.L M.S. Park, L.G. Jeon, S.R. Park and H.T. Kim, 2000. Vommercial molluscs from the freshwater and continental shelf in Korea. Gu - Deok, pp.180
3 Hartwick, E.B., L. Tulloch and S. MacDonald, 1981. Feeding and growth of Octopus defleini(Wulker). Veliger, 24, 129 - 138
4 Hartwick, E.B., 1983. Octopus defleini. Boyle, P.R. ed. Cephalopod life cycles. Academic Press, London, pp. 277 - 291
5 Hernandez - Garcia, V., J.L. Hernandez - Lopez and J.J. Castro, 2002. On the reproduction of octopus vulgaris off the coast of the Canary islands. Fisheries Research, 57, 197 - 203   DOI   ScienceOn
6 Kalland, A., 1996. Marine management in coastal Japan. Crean K. and D. Symes ed. Fishing News Books, 71-83
7 Mangold, K., 1983. Octopus Vulgaris. Boyle, P.R. ed. Cephalopod life cycles. Academic Press, London, pp. 335 - 364
8 Hartwick, E.B., R.F. Ambrose and S.M.C. Robinson, 1984. Dynamics of shallow - water populations of Octopus defleini. Marine Biology, 82, 65 - 72   DOI
9 Newman, M.A., 1963. 'Marijean' octopus expedition. Vancouver Pub. Aquar. Newst., 7(7), 467 - 471
10 Rees, W.J. and J.R. Lumby, 1954. The abundance of octopus in the English channel. J. Mar. Biol. Ass. U.K., 33, 515 - 536   DOI
11 An, Y.I. and J.Y. Park, 2005. Octopus fisheries in the coastal waters of Gangneung - I, pot fishery. J. Kor. Soc. Fish. Tech., 41, 271 - 278   과학기술학회마을   DOI   ScienceOn