羽色に基づく繁殖期のカルガモの雌雄判別

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タイトル別名
  • Sex determination of Eastern Spot-billed Ducks (Anas poecilorhyncha zonorhyncha) by plumage color in breeding season.
  • ハイロ ニ モトズク ハンショクキ ノ カルガモ ノ シユウ ハンベツ

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抄録

It proved possible to sex Eastern Spot-billed Duck Anas poecilorhyncha zonorhyncha on the basis of plumage color; 43 males and 37 females were collected in Tochigi Prefecture in May, 1987, and their sex determined by dissection. Sexual differences were found in the upper and under tail-coverts, and belly. Males have lustrous black upper and under tail-coverts, and a deep rufous-black belly. Females have rufous-black upper and under tail-coverts with pale buff-brown fringes or spots, and a belly similar to the breast.

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