어류군집 조사 결과 비교를 통한 최적의 방법 선택 = Optimal selection of fish assemblage survey method through comparing the result

국문 초록 (Abstract)

어류자원 조사는 수중카메라 모니터링 시스템, 통발 조사, 잠수 조사 방법을 이용하여 2021년 6월, 8월, 10월 제주도 인근에서 연구하였다. 단위 시간당 면적 대비 개체수(ind/m3/h)와 단위 시간당 면적 대비 종수(spp./m3/h)를 이용하여 수산자원 조사 방법의 효율성을 비교하였고 단위 시간당 면적(ind/m3/h) 대비 개체수를 비교한 결과 수중카메라 조사 214.69, 잠수 조사 124.6, 통발 조사 0.57 순으로 확인되었다. 단위 시간당 면적 대비 종 수((spp./m3/h)는 잠수 조사 0.85, 수중카메라 조사 0.38, 통발 조사 0.01 순으로 확인하였다. 개체수에서는 수중카메라를 이용한 어류 자원 모니터링 방법이 더 효율적인 것으로 나타났으며, 종수에서는 잠수 조사 방법이 더 효율적인 것으로 나타났다. 그러나 비용과 조사 효율성을 고려하면 수중카메라를 활용한 어류자원 조사 방법이 더 효과적인 것으로 판단되었다. 본 연구 결과는 향후 수산자원 조사의 핵심인 어류 개체군 밀도 추정에 널리 활용될 수 있을 것으로 기대된다.

다국어 초록 (Multilingual Abstract)

Fish resource surveys were conducted near Jeju Island in June, August and October 2021 using an underwater camera monitoring system, fish pots, and SCUBA diving methods. The efficiency of the methods used to survey fish resources was compared using the number of individuals compared to area per unit time (inds/m3/h) and the number of species compared to area per unit time (spp./m3/h). As a result of comparing the number of individuals compared to the area per unit time (inds/m3/h), the order was underwater camera 214.69, SCUBA diving 124.62, and fish pots 0.57 inds/m3/h. The number of species compared to area per unit time (spp./m3/h) is in the following order: SCUBA diving 0.85, underwater camera 0.38, and fish pots 0.01 spp./m3/h. The fish resource monitoring method using underwater cameras was found to be more efficient in individual counts, and the SCUBA diving method was found to be more efficient in species counts. When considering cost and survey efficiency, the fish resource survey method using underwater cameras was judged to be more effective. The results of this study are expected to be widely used in estimating the population density of fish, which is the core of future fisheries resource surveys.

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