Mammalia |
Carnivora |
Ursidae
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
底生の. Polar
Atlantic Ocean and the Arctic: Ursus maritimus maritimus: Canada, Northwest Territories, Baffin Island, Greenland, Svalbard, Russia, Labrador, Newfoundland, Quebec, Iceland, Norway; Ursus maritimus marinus: Russia, Beaufort Sea, Alaska, Bering Sea, Kamchatka, Kuril Island, Sea of Okhotsk, Japan (Ref. 1522).
初回成熟時の長さ / サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm Max length : 250 cm TL オス/雌雄の選別がない; (参照 1394); 200 cm TL (female); 最大公表体重: 800.0 kg (参照 1394); 最大公表体重: 800.0 kg
Fur color: white, yellow, grey, or almost brown, depending on season and light conditions; black skin, including nose and lips; plantigrade; claws not retractable.
Generally associated with ice, but they have been swimming at sea many kilometers away from the nearest land. Feeds on ringed, bearded, harp and hooded seals, and rarely walruses and white whales; sometimes eat arctic cod and other forms of animal and vegetable matter (Ref. 1394). Generally associated with ice, but they have been swimming at sea many kilometers away from the nearest land. Feeds on ringed, bearded, harp and hooded seals, and rarely walruses and white whales; sometimes eat arctic cod (Ref. 1394), charr, sculpin, and plants (Ref. 81152). They display migration patterns and spend time on the ice for hunting, a positive energy state, and move to their terrestrial habitat, a negative energy state, when the ice melts. Earlier ice break-ups show earlier arrival of polar bears ashore (Ref. 93189).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
主な参考文献
参考文献 | コーディネーター | 協力者
Jefferson, T.A., S. Leatherwood and M.A. Webber 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. (参照 1394)
IUCNのレッドリストの状況は
(参照 130435: Version 2025-2 (Global))
脆弱 (VU) (A3c); Date assessed: 27 August 2015
ワシントン条約ステータス (参照 108899)
人間に対する脅威
人間の用途
水産業: 商業
FAO - 水産業: 種の外形; Publication: search | FishSource | 私達の周りの海
用具
インターネットの情報源
モデルに基づく推定値
回復力
(Ref. 69278): |
高い, １５か月以下の倍増期間の最小個体群 (K=0.52-0.78; tm=4.1) |
漁業の脆弱性
(参照 71543) |
High vulnerability (64 of 100). |
価格帯
(参照 80766): |
Unknown. |
