Change of Iris Color with Age in Great Spotted Woodpeckers Dendrocopos major
スポンサーリンク
概要
- 論文の詳細を見る
Great Spotted Woodpeckers were captured in winter in the Tomakomai Experiment Forest of Hokkaido University and their iris color was examined.Except for one case (irides grey), all individuals had either brown or wine red irides. Individuals with brown irides predominated (94.6% of males, 96.0% of females) when they were captured for the first time, but when recaptured one year later they had wine red irides. Thus iris color appears to change from brown to wine red with age; no change of iris color occurred amongest birds with wine red iris when first caught.A model of process of iris color change is given and it is suggested that iris color could be used for ageing woodpeckers (Table 3).
- 日本鳥学会の論文
日本鳥学会 | 論文
- コウノトリCiconia boyciana の羽1本からの抽出DNAを用いたPCR法による性鑑別
- ハシボソガラスの自動車を利用したクルミ割り行動のバリエーション
- オオミズナギドリ雛の短期的な栄養状態は親の給餌調節に影響しない
- ウミウの採餌トリップ長の個体変異が繁殖成績に及ぼす影響
- 技術報告 オオミズナギドリの給餌生態研究への自動体重計及び出入り記録装置の利用