인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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개인구독
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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록·키워드
This study was conducted to understand the variation of Characteristics of Swans(Cygnus spp.) between 1990s and 2000s at the Nakdong estuary, Korea. The dataset was collected through two long term monitoring; in the early 1990s (May 1989~April 1993) and the mid 2000s (May 2002~April 2008). During the period, the observed Swans(Cygnus spp.) at the Nakdong estuary was 2 species and 73,655 individuals: 28,417 Tundra Swan(Cygnus columbianus), 45,238 Whooper Swan(Cygnus cygnus), respectively. Among the 2 species (and 73,655 individuals) of Cygnus genus, 10,828 individuals were observed in the early 1990s, which were 5,238 Tundra Swan, 5,590 Whooper Swan. In addition, 62,827 individuals were observed in the mid 2000s, which were 23,179 Tundra Swan, 39,648 Whooper Swan. The observed individuals were larger in the mid 2000s(Mean=10,471.17) than in the early 1990s(Mean=2,707.00), and also there was significant difference in the number of individuals between the early 1990s and the mid 2000s. The average number of observed individuals at five different regions was 4,122.67 in Daemadeung, 503.33 in Jangja･Shinjado, 600.50 in Saja･Doyodeung, 3,398.00 in Lower Ulsukdo and 1,846.67 in Ulsukdo, respectively, and the total average of these 5 regions was 2,094.23. There was significant difference among the monitoring regions(Kruskal-Wallis test, x<SUP>2</SUP> =24.170, P<0.001). Particularly, the observed individuals were larger in Daemadeung and Lower Ulsukdo than in other three regions.
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최근 본 자료 전체보기
UCI(KEPA) : I410-ECN-0101-2017-498-000770962
