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음향을 이용한 남해 연안에 서식하는 상괭이(Neophocaena asiaeorientalis) 의 출현 특성 연구

Emergence Characteristics of Narrow-ridged Finless Porpoise Neophocaena asiaeorientalis Using Passive Acoustic Survey in the South Sea of South Korea

손호선|김은호|최슬기
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)|2021.12|한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)|제54권 제6호|pp. 989-999|DOI https://doi.org/10.5657/KFAS.2021.0989

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참고문헌

키워드

ClicksNarrow-ridged finless porpoisePassive acoustic monitoringSouth sea of South Korea
주제분류수산학

초록

The sound of finless porpoises Neophocaena asiaeorientalis was recorded with an acoustic recorder to confirm their emergence in the South Sea of South Korea in February, June, and November 2020. Sea water temperature and salinity were also measured. In addition, a sighting survey was conducted to observe the behavior of the finless porpoises and the marine environment, and the clicks of the finless porpoises were recorded every day. The results showed that they always emerged in the survey area. The finless porpoises mainly foraged, whereas some played or rested. The water temperature range of areas where the finless porpoises emerged was 7.5-23.5°C. Assuming that the number of clicks corresponds to the number of finless porpoises, the finless porpoises emerged the most during spring. The emergence decreased during winter and was the lowest during autumn. The finless porpoises emerged more during the daytime than during the nighttime in all seasons, indicating a temporal difference in the usage of the survey area. This might be due to the movement of prey organisms according to regional characteristics. A long-term survey and research on habitat use and environment is needed to manage and conserve the finless porpoises.

Abstract

The sound of finless porpoises Neophocaena asiaeorientalis was recorded with an acoustic recorder to confirm their emergence in the South Sea of South Korea in February, June, and November 2020. Sea water temperature and salinity were also measured. In addition, a sighting survey was conducted to observe the behavior of the finless porpoises and the marine environment, and the clicks of the finless porpoises were recorded every day. The results showed that they always emerged in the survey area. The finless porpoises mainly foraged, whereas some played or rested. The water temperature range of areas where the finless porpoises emerged was 7.5-23.5°C. Assuming that the number of clicks corresponds to the number of finless porpoises, the finless porpoises emerged the most during spring. The emergence decreased during winter and was the lowest during autumn. The finless porpoises emerged more during the daytime than during the nighttime in all seasons, indicating a temporal difference in the usage of the survey area. This might be due to the movement of prey organisms according to regional characteristics. A long-term survey and research on habitat use and environment is needed to manage and conserve the finless porpoises.

참고문헌 (46)

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