Feeding rhythm and vertical migration of the euphausiid Euphausia pacifica in coastal waters of north-eastern Japan during fall

Yoshizumi Nakagawa, Yoshinari Endo, Hiroya Sugisaki

    研究成果: Article査読

    24 被引用数 (Scopus)

    抄録

    We investigated the feeding rhythm and diel vertical migration of Euphausia pacifica in coastal waters of north-eastern Japan in September 2000. The euphausiids arrived at the surface early in the night and sank just after satiation. Gut pigment contents and stomach fullness were higher in the food-rich surface layer at night than in the food-poor deep layer during the day. Feeding activity of E. pacifica during daytime was low even if food organisms were abundant in the ambient water in the top 50 m. Therefore, the feeding rhythm of E. pacifica is explained by decreased feeding activity during the day rather than by reduced food availability.

    本文言語English
    ページ(範囲)633-644
    ページ数12
    ジャーナルJournal of Plankton Research
    25
    6
    DOI
    出版ステータスPublished - 2003 6月 1

    ASJC Scopus subject areas

    • 生態、進化、行動および分類学
    • 水圏科学
    • 生態学

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