A member of the mammalian class, rodent order, family Cricetidae. Widely distributed in North America. Inhabits waterside areas such as marshes, lakes, and rivers, and feeds mainly on aquatic plants, but also eats shellfish, frogs, and fish. It builds its nest on the shoreline, with its entrance underwater. Head and body length is 25-36 cm, tail length is 20-28 cm, and weight is 1-1.8 kg. Its tail is long and flat, and it has a pair of glands at the base of its tail that give off a musky odor, hence its name, the stinky mouse. The toes on its hind feet have stiff hairs that act as webs. Gestation period is 22-30 days. It gives birth from April to August, and in warm regions, it also gives birth in winter, with 1-11 pups per birth. It has 3 pairs of nipples. It was introduced to Europe and other places as a fur animal and kept as a pet, but it has also become widely feral in various places. In Japan, they were kept as pets during World War II, but some escaped and became wild in the Kanto region. The former Soviet Union was the largest producer of fur. [Takeo Miyao] [Reference] |© Hidehiko Tamagawa "> Major species of mice [specimen illustrations] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
哺乳(ほにゅう)綱齧歯(げっし)目キヌゲネズミ科の動物。北アメリカに広く分布している。沼沢地、湖、河川など水辺にすみ、水生植物を主食としているが、貝類、カエル、魚類なども食べる。岸辺に巣をつくり、出入口は水中にある。頭胴長25~36センチメートル、尾長20~28センチメートル、体重1~1.8キログラム。尾は長くて扁平(へんぺい)、尾の付け根にじゃ香musk臭を放つ1対の腺(せん)があるのが名の由来で、ニオイネズミともよばれる。後ろ足の指に硬毛があり、水かきの役割を果たしている。妊娠期間22~30日。4~8月、暖地では冬にも出産し、1産1~11子。乳頭は3対。毛皮動物としてヨーロッパなどへも移入されて飼育されたが、各地で広く野生化もしている。日本でも第二次世界大戦中飼育されていたが、逃げ出したものが関東地方で野生化している。毛皮生産では旧ソ連が最大であった。 [宮尾嶽雄] [参照項目] |©玉川秀彦"> ネズミのおもな種類〔標本画〕 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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