Aves |
Anseriformes |
Anatidae
环境：氛围 / 气候带 / 深度上下限 / 分布范围
生态学
Others. Polar
Northeast Pacific, Northern Atlantic and the Arctic.
首次成熟时的长度 / 大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm最大体重: 1.6 kg (参考文献 356)
Culmen: 3.175 cm; tarsus: 4.6 cm; wing: 27.35 cm.
Coastal (Ref. 356). A boreal species (Ref. 95075). Winters in the north Pacific (Ref. 356). Also, in northern Norway where it is sympatrically associated with Common Eiders, Somateria mollissima, through feeding depth segregation; diving to >20 m, in areas dominated by cobble. Diet studies reflect its deep-water feeding habit, preferring low energetic food such as echinoderms. Possibly one of the most deep-diving species of sea ducks; with flocks observed diving to depths of 40 m (Ref. 60129). Displays surface-diving and head-dipping (Ref. 356). Generally diurnal feeders. Often feed in densely packed rafts of up to about 70 individuals, with highly synchronized diving; occasionally feeding singly or in loose flocks with unsynchronized diving. At sea, feed primarily on benthos, specifically mollusks, crustaceans and echinoderms. Principal moulting area in the eastern Canadian Arctic is in the Disko Bay region, central West Greenland, with about 100,000 birds congregating in autumn. Active during the day, resting at mid-day and during the night offshore on the deepest waters of the fjords. Generally shy birds, particularly during molting (Ref. 95257).
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
主要参考文献
参考文献 | 合作者 | 合作者
SAUP Database 2006 SAUP Database. www.seaaroundus.org. (参考文献 356)
世界自然保护联盟红皮书
(参考文献 130435: Version 2025-2 (Global))
Not Evaluated
对人类的威胁
人类利用
FAO - Publication: search | FishSource |
工具
更多信息
人口动态成长
最大年龄/尺寸
长度-重量关系
长短关系
体长-频率
质量转换
丰度
网络资源
基于模型的估算
渔业脆弱性
(参考文献 71543) |
(0 of 100). |
价格分类
(参考文献 80766): |
Unknown. |
