【動画】LASBOS card 022
Copepoda Calanus hyperboreusThis is one of the large copepod species occurring in the Arctic Ocean basin, and it is endemic to the Arctic Ocean. They reaches approximately 1 cm in body length. The transparent liquid visible inside the body consists of accumulated lipid (primarily wax esters). Using this stored lipid as energy, this species descent to 1,000 m depth before sea-ice coverage and diapause in the deep layer. They then matures, mates, and produces eggs in the deep layer. Their generation length ranges from three to five years in the Arctic Ocean, and that length is determined by primary production in each region In the Arctic Ocean.
Photo: MATSUNO Kohei
Text: MATSUNO Kohei
カイアシ類 Calanus hyperboreus
北極海海盆域に出現する大型カイアシ類の1種で、北極海固有種です。体長はおよそ1 cmになります。体内に見える透明な液体は、蓄積した油球（主にワックスエステル）です。この蓄積した脂質のエネルギーを使用して、結氷前に深海1000 mまで潜り、そこで休眠を行います。その後、深海で成熟・交尾を行い、卵を産出します。北極海内で世代時間は3-5年と幅があり、その長さは海域の一次生産量の多寡によって決まります。
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