강릉시 연안 문어어업에 관한 연구 - Ⅰ - 통발어업 -
Octopus fisheries in the coastal waters of Gangneung - Ⅰ - Pot fishery -
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동해안의 문어 통발어업에 대한 어획상황을 조사하기 위하여 강릉시 주변 해역에서 문어의 월별, 수심별 어획량, 어획체중 및 어구의 침지시간과 유실에 대해서 2003년 2-12월의 10개월간 일반어선과 실습선을 이용하여 투승 통발 150개를 기준(1회)으로 62회 걸쳐 조사한 결과는 다음과 같다. 월별 CPUE(통발당 문어어획량)은 대체로 6-9월에 높았는데, 그 중 7월(134g/pot, 19.21kg/haul)에 가장 높았다. 어획된 문어체중은 외국에서 2kg 미만을 보호하는 것을 고려하면 1kg 미만이 76%(486마리)로 대부분 소형 문어였다. 수심별 문어 어획량은 40m 이상의 수심에서 높았고, CPUE는 수심 60m 이상에서101g/pot, 13octopus/haul로 가장 높았다. 침지시간(4-18일)별 어획량은 침지시간 7일경에 가장 높았고, 13-18일에도 높게 나타났는데 이는 어구유실에 의한 Ghost-fishing의 가능성을 시사하고 있다. 어구유실은 유실빈도와 유실량을 고려할 때 수심 20-30m에서 가장 높았다. 따라서 문어통발어업은 30m 보다 깊은 수심에서 조업하는 것이 타 업종간의 마찰도 해소하고 조업효율도 높은 것으로 판단된다.
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 days 13-18 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.
참고문헌 (12)
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