An animal of the family Salamanderidae in the order Caudata in the class Amphibians. It is endemic to Hokkaido and is found widely in the lowlands and mountains of the island. It is 11 to 18 centimeters long. Its back is blackish brown or yellowish brown, and some individuals have tiny yellow spots scattered on them. It lays eggs in still water such as ponds, marshes, and ditches. The spawning season varies greatly from location to location, ranging from April to July, depending on the snow melting period. It attaches a pair of loosely coiled string-like egg sacs to dead branches underwater and lays around 100 eggs. Hokkaido is also home to the northern salamander, Salamandrella keyserlingii . [Mitsuru Kuramoto] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
両生綱有尾目サンショウウオ科の動物。北海道固有の種で、全島の低地や山地に広く分布する。全長11~18センチメートル。背面は黒褐色または黄褐色で、微小な黄斑(おうはん)が散在する個体もある。池や湿地、溝などの止水に産卵する。産卵期は雪解けの時期と関連して場所による差が大きく4月から7月にわたる。緩く巻いた1対の紐(ひも)状卵嚢(らんのう)を水中の枯れ枝などに付着させ、100個内外の卵を産み付ける。北海道にはこのほかキタサンショウウオSalamandrella keyserlingiiが分布する。 [倉本 満] 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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