アホウドリ<i>Phoebastria albatrus</i>の羽衣外観の成熟過程―鳥島における年齢と性別が既知な個体に基づく解析―

• 今野 怜

• 今野 美和

• 佐藤 文男

  公益財団法人山階鳥類研究所

書誌事項

タイトル別名

• Maturation of Plumage in the Short-tailed Albatross <i>Phoebastria albatrus</i> Based on Birds of Known Sex and Age on Torishima
• アホウドリPhoebastria albatrusの羽衣外観の成熟過程 : 鳥島における年齢と性別が既知な個体に基づく解析
• アホウドリ Phoebastria albatrus ノ ハゴロモ ガイカン ノ セイジュク カテイ : トリシマ ニ オケル ネンレイ ト セイベツ ガ キチ ナ コタイ ニ モトズク カイセキ

抄録

To facilitate the accurate description of plumage of the Short-tailed Albatross Phoebastria albatrus, we classified plumage into eight components, based on photos taken at a breeding colony on Torishima, Izu Islands. Plumage components of 20 individuals just before fledging and 729 individuals of known sex and ranging in age from 2 to 26 years were scored. The plumage color became more whitish with age. The underbody plumage became white earlier than the upper body, whereas on the thigh, tibia and a posterior part of undertail coverts, dark brown feathers remained even in older age. The upper body turned white from the uppertail coverts towards the front, whereas dark brown feathers remained on the mantle, scapulars and nape, even in older age. The upperwing and underwing were often the same score. The progress of the score was earlier for males than for females. At every age from 3 to 18 years, the summed score of seven components (the underwing score was excluded) was significantly different between sexes, although older age males and females could be considered to have the same score. Individuals with a dark brown mantle, scapulars, rump and uppertail coverts were of age of 5 or less years and had not yet bred, except for a few females. Many individuals started breeding after they had a white part on the rump and uppertail coverts. Males reached final plumage pattern at the age of 8 to 15 years, while females reached final plumage pattern at the age of 11 to 20 years or older.

収録刊行物

• 山階鳥類学雑誌

  山階鳥類学雑誌 50 (1), 1-27, 2018-08-31

  公益財団法人 山階鳥類研究所

キーワード

• 年齢推定
• アホウドリ類
• 羽衣の発達様式
• 羽衣スコア
• 性差

詳細情報

• CRID: 1390564227297094656
• NII論文ID: 130007698449
• NII書誌ID: AA11864856
• DOI: 10.3312/jyio.50.1
• ISSN: 18820999
• ISSN: 13485032
• NDL書誌ID: 029249934
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029249934
• Web Site: https://www.jstage.jst.go.jp/article/jyio/50/1/50_1/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可