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Octopus fisheries in the coastal waters of Gangneung - I - Pot fishery -

강릉시 연안 문어어업에 관한 연구- I - 통발어업 -

  • An, Young-Il (Dept. of marine industry, Gangwon Provinical College) ;
  • Park, Jin-Young (Dept. of marine industry, Gangwon Provinical College)
  • 안영일 (강원도립대학 해양산업과) ;
  • 박진영 (강원도립대학 해양산업과)
  • Published : 2005.11.30

Abstract

In order to study the catch situation of the octopus pot fishery in the coastal waters of Gangneung, catch quantities and weight per month and depth, the soaking time & loss of fishing gear were studied based on 62 fishing times (1 set consisted of 150 pots which is equivalent to 1 fishing time) over a period of 10 months from February to December 2003 using commercial fishing vessels and training ships. The monthly CPUE was generally high in the months of june - September, and during this period July showed the highest quantity (134g/pot, 19.21kg/haul). In consideration of the fact that octopus below the weight of 2kg is protected in foreign countries, the majority of the catch was small with 76% (486 octopuses) below 1kg. The octopus catch quantity was high in depth of more than 40m, and the average catch number per set of pots in depths of over 50m was the highest with 13 octopuses. CPUE(g/pot) was the highest at a depth of over 60m recording 101. In terms of catch quantity per soaking time (4-18 days) the highest was on the 7th day, and 13-18 days also recorded high catches, and this suggests the possibility of ghost - fishing with the loss of fishing gear. Loss of fishing gear was the highest in terms of loss frequency and amount at depths of 20-30m. Consequently, it seems that octopus pot fishing at depths of more than 30m would relieve friction with other types of fishing and increase fishing efficiency.

Keywords

Pot fishery;Octopus(Paroctopus dofleini)

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Cited by

  1. Comparison of fishing efficiency on octopus traps to reduce bycatch in the East Sea vol.44, pp.1, 2008, https://doi.org/10.3796/KSFT.2008.44.1.001