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Original Articles

A Study on the Estimation of Fisheries Resources at Ullueng Coastal Marine Ranching Area in 2023

2023년 울릉군 연안바다목장 수산자원량 추정 연구

Geang Bok Kim1*
,
Sang Hack Choi2
,
Chang Geun Choi3
김 광복1*
,
최 상학2
,
최 창근3
1East Sea branch Ecological restoration division, Korea Fisheries Resources Agency, Pohang 37602, Korea
2Seamorning Engineering Co. Ltd., Seoul 06716, Korea
3Department of Ecological Engineering, Pukyong National University, Busan 48513, Korea
1한국수산자원공단 동해본부
2(주)씨모닝
3부경대학교 생태공학과
*Corresponding Author
30 June 2024. pp. 21-40
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Abstract

Korea’s marine ranches have been established in various coastal areas, starting with Tongyeong, with the aim of restoring and efficiently managing fishery resources. Effective management of the fishery can only be carried out if the exact status of the marine ranch is known. There are a number of different methods used to estimate the abundance of fishery resources. Of these, fishing gear surveys provide species specificity but require a lot of survey time, and quantitative surveys are difficult because only a few stations can be surveyed over a large area. On the other hand, hydroacoustic surveys are widely used in developed fisheries. They can estimate the spatial and temporal distribution and abundance of fish over large areas in a short time. Hydroacoustic surveys can estimate the abundance of fishery resources based on the target strength (TS) of dominant species in the survey area and the volume backscattering strength (SV) obtained from field surveys. In this study, fish species were identified using fishing gear and distribution and abundance of fish were estimated using hydroacoustic surveys at Ullueng coastal marine ranching area.

Keywords
Abundance
Fish
Hydroacoustic
Recovery of Fisheries Resources
Target strength
Ullueng

우리나라의 바다목장은 수산자원의 회복과 효율적인 관리를 목적으로 통영을 시작으로 전국 각 해역에 생성되었다. 수산자원을 효율적으로 관리하려면 바다목장의 정확한 상태를 파악해야 하고, 이를 위해 우선 수산자원의 현존량을 파악하고자 하였다. 수산자원의 현존량을 파악하는 방법은 여러 가지가 있으며, 그 중 어구 조사는 종 명확성은 있으나 많은 조사 시간이 필요하고, 넓은 해역의 일부 정점만 조사가 가능하므로 정량적인 조사가 어렵고, 수중음향 조사는 단시간에 넓은 해역에 서식하고 있는 어류의 시ㆍ공간적인 분포 및 현존량을 평가할 수 있어 수산 선진국에서 많이 이용되고 있는 방법이다. 수중음향 조사기법은 조사해역의 우점 어류의 음향산란강도(Target strength, TS)와 현장조사를 통한 체적후방산란강도(Volume back scattering strength SV)를 기반으로 수산자원 현존량을 파악할 수 있다. 본 조사에서는 어구를 이용하여 어종을 파악하고, 수중음향 조사기법을 이용하여 연안 바다목장에 서식하는 수산자원의 어류의 밀도 및 현존량을 파악하였다.

키워드
수산자원의 회복
수중음향
어류
울릉군
음향산란강도
현존량
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 4
  • No :1
  • Pages :21-40
  • Received Date : 2024-06-17
  • Revised Date : 2024-06-25
  • Accepted Date : 2024-06-25
  • DOI :https://doi.org/10.23135/an.2024.4.1.3
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