학술논문
한려해상국립공원 홍도와 태안 난도의 괭이갈매기 번식현황
Status of Black-tailed gulls breeding on Hongdo (Hallyeohaesang National Park) and Nando Island
Status of Black-tailed gulls breeding on Hongdo (Hallyeohaesang National Park) and Nando Island
Document Type
Article
Text
Text
Author
김미란; 이용순; 최세준; 김양모; 김재훈; 황보연; 권영수; Miran Kim; Yong-soon Lee; Se-jun Choi; Yang-mo Kim; Jae-hun Kim; Bo-yeon Hwang; Young-soo Kwon
Source
국립공원연구지, 11/30/2022, Vol. 13, Issue 2, p. 61-66
Subject
Language
Korean
ISSN
2093-0674
Abstract
Seabirds take a long time to recover if their population decreases due to slow growth and small clutch size. This study was conducted to collect basic data of breeding status of Black-tailed gulls (Larus crassirostris) on Hongdo Island of Hallyeohaesang National Park and and Nando Island. These two breeding colonies are designated as natural monuments. We investigated egg volume, clutch size and nest density in May 2022. As results, clutch size was 1.89±0.57 in Hongdo Island and 1.91±0.48 in Nando Island. The egg volume was also similar between Hongdo Island (59.22±5.47) and Nando Island (59.63±3.96). The nest density was significantly higher in Hongdo Island (1.27±0.18/㎡) than in Nando Island(0.54±0.15/㎡). Breeding population was estimated as 56,729 pairs in Hongdo Island while 14,112 pairs in Nando Island based on the proportion of breeding areas. Long-term monitoring is required to know the trends of Black-tailed gulls to protect breeding colonies.