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가덕도 상괭이(Neophocaena asiaeorientalis)의 분포 및 계절적 변화
박겸준,윤영글,신정호,손호선,최영민,Park, Kyum Joon,Yoon, Young Geul,Sin, Jeong-Ho,Sohn, Hawsun,Choi, Young-Min 한국수산과학회 2017 한국수산과학회지 Vol.50 No.5
Few studies on the finless porpoise Neophocaena asiaeorientalis have been conducted on the south coast of Korea. This region includes Gadeok Island, which is located off the Korean peninsula in an area of heavy maritime traffic. Sighting surveys of finless porpoises were conducted at seven predetermined spots around Gadeok Island in January, May, July, September, and November 2016. Finless porpoises (127 individuals in 24 schools) were sighted at all but one (spot P5) of the survey locations. Fewer porpoises were spotted in summer (Jul and Sep) than in other seasons (P<0.05). Porpoises were most abundant around the south coast of the island, where they were spotted in every season, and in significantly higher numbers than at other locations (P<0.05). Single individuals accounted for 20.8% of sightings, while 25.0% of sighted schools consisted of only two porpoises. The mean school size was 5.29 individuals (SD=6.72).