山階鳥類研究所研究報告
Online ISSN : 1883-3659
Print ISSN : 0044-0183
ISSN-L : 0044-0183
北太平洋および鳥島のクロアシアホウドリの現状と保全
林 京一小城 春雄鶴見 みや古佐藤 文男
著者情報
ジャーナル フリー

1997 年 29 巻 2 号 p. 97-101

詳細
抄録

The Black-footed Albatross (Diomedea nigripes) now breeds on eleven islands in the eastern North Pacific and on five islands in the western North Pacific. The breeding population of the eastern North Pacific is slightly declining, but that of the western North Pacific is increasing. The total population in the North Pacific is estimated to be 200, 000, of which 50, 000 are breeding birds. This population size is very small compared with the congener Laysan Albatross (D. immutabilis), which has a total population of 2, 500, 000 birds. On Torishima, which has the largest breeding population of Black-footed Albatrosses in the western North Pacific, the Black-foots have increased in number, since a new colony was built on the island during the 1988/89 breeding season. The numbers of fledged chicks in each breeding season were 1 in 1988/89, 5 in 1989/90, 84 in 1992/93, 55 in 1993/94, 125 in 1994/95, and 158 in 1995/96. In addition to the conservation of Short-tailed Albatrosses (D. albatrus), now successfully established on Torishima, multi-faceted protective programs are also planned for other breeding seabirds of this island. The programs should include such projects as: re-establishment of colonies of the Laysan Albatross and Tristram's Storm-Petrel (Oceanodroma tristrami), elimination of introduced animals, vegetation improvement, control of soil erosion at seabird nesting sites, and establishing a protected sea area around the island.

著者関連情報
© 財団法人 山階鳥類研究所
前の記事 次の記事
feedback
Top