Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Breeding Status and Ecology of Saunders' Gulls (Larus saundersi) in Songdo Reclaimed Land, West Coast of Korea

서해안 송도매립지에서 번식하는 검은머리갈매기의 현황과 번식생태

  • Kwon, Young-Soo (National Park Research Institute Korea National Park) ;
  • Chung, Hoon (Department of Animal Science Sahmyook University)
  • 권영수 (국립공원관리공단 국립공원) ;
  • 정훈 (삼육대학교 동물과학부)
  • Published : 2009.09.30
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Abstract

Saunders' gulls (Laurs saundersi) which are listed as globally vulnerable species on the IUCN Red List are distributed in East Asia and breed mainly in China and Korea. Their population is estimated to be between 7,100 to 9,600. Songdo reclaimed lands in the western coast of South Korea are the main breeding sites for these species. However, most of these breeding sites have been seriously disturbed in the last several years because of new urban development constructions. This study was conducted to provide baseline data on the breeding ecology of Saunders' gulls. Since 1998, the breeding population has rapidly increased in South Korea, with the number of nests rising from 85 nests in 2000 to 185 nests in 2005. Egg volume is more variable than breadth or length. Clutch size, hatching and breeding success were $2.9{\pm}0.81$ (n=182, mean$\pm$sd.), 48.07% (75 hatched egg/156 eggs) and 29.08% (155 fledglings/533 eggs), respectively. Factors affecting breeding failure were predation, rainfall, starvation and supernormal clutches. These results are provided along with other cited literature to argue for conservation of Saunders' gulls.

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References

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