ホッキョクグマ

📖 1. 概要

現生の陸上食肉目動物の中で平均体重が最も重い最大級の捕食者で、学名は「海のクマ（Ursus maritimus）」を意味します。

🌐 Wikipedia 要約抜粋

The polar bear is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed. The polar bear is the largest extant species of bear and land carnivore by body mass, with adult males weighing 300–800 kg (660–1,760 lb). The species is sexually dimorphic, as adult females are much smaller. The polar bear is white or yellowish-furred with black skin and a thick layer of fat. It is more slender than the brown bear, with a narrower skull, longer neck and lower shoulder hump. Its teeth are sharper and more adapted to cutting meat. The paws are large and allow the bear to walk on ice and paddle in the water.

🦴 2. 体の構造と特徴

中空で透明な管構造の毛と黒い皮膚、厚さ11cmの脂肪層により、北極海の氷水の中でも体温を完璧に保ちます。

🔍 3. 生態と行動

1.5km先の氷の下にあるアザラシの呼吸穴の匂いを感知する超高感度の嗅覚を持っています。

🇰🇷 4. 韓国との関わり

韓国極地研究所（KOPRI）の北極茶山科学基地における気候変動生態研究の代表的な指標種です。