plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
어남규·김소라·박겸준·이상헌1·김현우2*
국립수산과학원 고래연구소, 1부산대학교 해양학과, 2국립수산과학원 연근해자원과
The spotted seal Phoca largha a primary marine mammal found along the Korean coast, exhibits a seasonal migration pattern between breeding and feeding areas. In this study, population fluctuations of spotted seals were analyzed around Baengnyeongdo Island, Korea, from 2016 to 2021. Field surveys were conducted at two major haulout sites, Mulbeom rocks and Yeonbong rocks, during low tide between April and November of each year. The results indicate that the highest number of spotted seals was observed in summer, particularly in August or September. Mulbeom rocks consistently accommodated more spotted seals than Yeonbong rocks, suggesting that it is a more suitable haulout site for the spotted seals. The recorded population was approximately 200 spotted seals, showing a slight decrease when compared with previous surveys conducted in 2000-2002 and 2006-2008. This decline could be attributed to overhunting and habitat degradation. Fluctuations in the number of spotted seals could also be influenced by short-term factors such as weather conditions. Further research incorporating drone surveys and photo-identification will improve our understanding of population dynamics and support conservation measures for spotted seals in this region.
Spotted seal, Phoca largha, Population, Baengnyeongdo Island