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

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)633-644
    Number of pages12
    JournalJournal of Plankton Research
    Volume25
    Issue number6
    DOIs
    Publication statusPublished - 2003 Jun 1

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Aquatic Science
    • Ecology

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