This cephalopod squid (Ommastrephas nigricans) is the most commonly eaten squid in Japan (illustration). Its mantle is about 30 cm long, with black vertical stripes along its dorsal line, and its fins are diamond-shaped and extend over the dorsal tip. Its arms are about half the length of its mantle, with two rows of suckers, and its tentacles are longer than its arms but shorter than its mantle. It lives at depths of 30 to 100 m from Sakhalin to Kyushu, the Korean Peninsula, and Primorsky Krai. Its main spawning grounds are in the East China Sea, extending south of Kyushu. It spawns in the summer and winter, when eggs are released into the sea, hatching between December and May, and becoming adults in one year and swimming in schools. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
日本でもっともふつうに食用とされている頭足綱アカイカ科のイカ(イラスト)。外套(がいとう)長30cmくらいで背中線に黒い縦筋があり,ひれはひし形で先端の背面に広がる。腕は外套長の半分くらいで吸盤は2列,触腕は腕より長いが外套長より短い。サハリンから九州,朝鮮半島,沿海州などの水深30~100mにすむ。主要な産卵場は東シナ海を中心として九州南方にわたる。産卵は夏~冬で,海中に放卵され,12~5月ころ孵化(ふか)して,1年で成体となり群泳する。
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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