...Some species build large nests, such as the desert woodrat N. lepida , which collects pieces of cactus to form the outer wall, and some can reach 1m in diameter and 40cm in height. Because of their habit of collecting various items, they are also known as pack rats, named after the traveling merchant pack man. Species that live in the south breed all year round, 2 to 3 times a year, and give birth to 1 to 4 babies per litter after a gestation period of 30 to 40 days. ... *Some of the terminology that mentions "pack rat" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…種類によっては大きな巣をつくり,サバクモリネズミ(サバクウッドラット)N.lepidaのようにサボテンのかけらを集めて外壁とし,直径1m,高さ40cmに達するものもある。いろいろな物を集める習性があるため,行商人pack manに由来するpack ratの別名がある。南方に生息する種では一年中繁殖し,年に2~3回,妊娠期間30~40日の後,1産1~4子を生む。… ※「pack rat」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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