Preliminary study of passive acoustic monitoring of finless porpoises Neophocaena asiaeorientalis around the Southwest offshore wind farm in Korea

Young Geul Yoon; Wonjun Yang; Jee Woong Choi

doi:10.7776/ASK.2021.40.6.537

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2021 Vol.40, Issue 6 Next Page

Research Article

Preliminary study of passive acoustic monitoring of finless porpoises Neophocaena asiaeorientalis around the Southwest offshore wind farm in Korea 서남해 해상풍력 실증단지 주변에서의 수동 음향 관측을 이용한 상괭이 모니터링 가능성 연구

30 November 2021. pp. 537-545

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Abstract

Due to the accelerated development and transformation of coastal waters by humans, damage to marine mammals is a concern. To understand how coastal development may affect marine mammals, it is essential to determine their distribution characteristics. In this study, the appearance of finless porpoises was confirmed by passive acoustic monitoring around the Southwest offshore wind farm in July, 2020. Although there were no visual observation results of finless porpoises in the research area, the clicks measured in the offshore wind farm were verified by comparing with acoustic characteristics of the clicks measured in the area with a high detection rate. During the experimental period, clicks of finless porpoises were recorded for ten consecutive days, and Clicks per Porpoise Positive Minute (CPPM) was 40.7 clicks min-1, Porpoise Positive Minutes (PPM) was 9.7 %, Encounter duration and waiting time were 18.2 min and 94.9 min respectively. This study provides information on the appearance of them in the Southwest offshore wind farm and this result may help to monitor the impact of marine mammals from wind farm operation.

Keywords

Passive acoustic monitoring

Finless porpoise

Click

Offshore wind farm

인간에 의한 연안 지역 개발 및 변형의 가속화로 인해 해양포유류에 대한 피해가 우려되고 있다. 연안 개발이 해양포유류에 어떤 영향을 미칠 수 있는지 이해하려면 이들의 분포를 파악하는 것이 중요하다. 본 연구에서는 서남해 해상풍력 실증단지에서 수동 음향 관측을 통해 상괭이의 출현을 확인하였다. 실험지역에서의 상괭이에 대한 목시관측 결과가 없으므로, 풍력단지에서 탐지된 클릭은 상괭이 발견율이 높은 지역에서 측정한 클릭과 음향특성을 비교하여 검증하였다. 음향 측정 결과에 의하면 상괭이는 매일 출몰하였으며, 평균 클릭수는 40.7회, 상괭이의 출현 비율은 9.7 %, 출현 시간은 18.2 min이며, 대기 시간은 94.9 min으로 나타났다. 이 연구를 통해 서남해 해상풍력 실증단지에서 알려지지 않은 상괭이 출현에 대한 정보를 제공하였으며, 이러한 결과는 풍력단지 운영으로 인한 해양포유류의 영향을 모니터링하는데 도움을 줄 수 있다.

키워드

수동 음향 관측

상괭이

클릭

해상풍력단지

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 40
No :6
Pages :537-545
Received Date : 2021-10-27
Revised Date : 2021-11-17
Accepted Date : 2021-11-22
DOI :https://doi.org/10.7776/ASK.2021.40.6.537

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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