실습선에 의한 LED 집어등의 오징어 어획성능
Fishing efficiency of LED fishing lamp for squid Todarodes pacificus by training ship
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초록
강원도립대학 실습선을 이용하여 LED燈의 개선에 따른 오징어의 어획성능을 조사하였다. 실습선인 해송호 (24톤)는 정격 소비전력 150W의 LED燈 72개 (10.8kW)을 설치하고 2009년 6월 15일-7월 27일 사이에 어획성능과 연료소비량 조사를 10회 수행하였고, 300W의 LED燈 71개(21.3kW)를 설치하여 2010년 1월 17일-8월 4일 사이에 5회 조사를 수행하였다. 이 때 LED燈에 의한 어획성능을 비교하기 위하여 동일 시기와 어장에서 조업하는 대부분 120kW의 MH燈으로 조업하는 대조어선의 어획량을 조사하였다. 해송호의 조업 중의 연료소비량은 총 연료소비량 5,262.6ℓ중 약 19.9%인 1,047.7ℓ이고 조업시간당 연료소비량은 평균 9.2ℓ이었다. LED燈 선박의 매회 어획량은 12-1,640마리로 평균 652마리였고, 10척의 대조선박인 MH燈 어선은 40-4,800마리를 어획하여 평균 2,055마리였다. 오징어 어획은 손낚시와 자동조획기로 하는데, 1인당 손낚시와 자동조획기 1개 롤러의 낚싯줄에 어획된 마릿수는 LED燈 선박에서 손낚시와 자동조획기의 어획비율 50.8% : 49.2%이었으나 MH燈 어선의 경우 86.4% : 13.6%로 특히 MH燈 어선은 주로 손낚시로 어획하였다. 한편, 자동조획기 1대당 어획량의 비교에서는 LED燈 선박이 MH燈 선박과 비슷하거나 많이 어획하였다. 따라서 LED燈에 의한 어획가능성은 보여주었지만 총 어획량에서 MH燈보다 낮기 때문에 앞으로 더욱 LED燈의 집어능력을 높이기 위한 성능개선이 필요하다고 판단된다.
Abstract
This study surveyed the fishing efficiency for Japanese common squid based on improvements made to LED fishing lamps by utilizing the training ship of Gangwon Provincial College. The training ship, Haesong-ho (24 tons), was equipped with seventy-two 150W electric power LED fishing lamps (10.8kW), and their fishing efficiency and fuel consumption level were surveyed for a total of ten times during the period between June 15, 2009 and July 27, 2009. In addition, the training ship was equipped with seventy-one 300W electric power LED fishing lamps (21.3kW) and their fishing efficiency and fuel consumption level were surveyed for a total of five times during the period between January 17, 2010 and August 4, 2010. In order to compare the fishing efficiency of LED fishing lamps, the catch of another fishing vessel equipped with Metal Halide (MH) fishing lamps of 120kW for the same period and at the same fishing grounds. The fuel consumption levels during the fishing operation of Haesong-ho was about 1,047.7 liters which was approximately 19.9% of the total fuel consumption level of 5,262.6 liters, and the fuel consumption level per operation hour was on average 9.2 liters. The number of Japanese common squid caught by the LED fishing lamp-equipped fishing vessel ranged from 12 to 1,640 squid for each fishing trial and the average quantity was 652. The number of Japanese common squid caught by the MH fishing lamp-equipped 10 fishing vessels ranged from 40 to 4,800 squid and the average quantity was 2,055. The fishing of Japanese common squid was done by the use of hand lines and an automatic jigging machine. The number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 50.8% to 49.2% with respect to the LED fishing lamp-equipped fishing vessel. However, the number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 86.4% to 13.6% with respect to the MH fishing lamp-equipped fishing vessel where most of the catch was made by hand lines. On the other hand, in comparing the number of Japanese common squid caught per automatic jigging machine, the number of squid caught by the LED fishing lamp-equipped fishing vessel was about the same or greater than the number of squid caught by the MH fishing lamp-equipped fishing vessel.
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