Microzooplankton standing crop in the western subtropical pacific off the Bonin Islands in winter, 1980

Yoshinari Endo, Hiroshi Hasumoto, Akira Taniguchi

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    10 Citations (Scopus)


    Quantitative data on the vertical distribution and biomass of microzooplankton are presented for the western subtropical Pacific west of the Bonin Islands in winter. Microzooplankton other than foraminifera and radiolarians showed similar vertical distribution to chlorophyll a. Among microzooplankters, naked ciliates, tintinnids and copepod nauplii were dominant components both in number and volume. Naked ciliates were the most dominant, comprising 82.2 % and 47.7 % of the total microzooplankton by number and volume, respectively. Copepod nauplii, occupying less than 10 % by number, accounted for 35.7 % of the volume of all microzooplankton. Tintinnids contributed less to the microzooplankton standing crop, 12.6 % of the total by number and 17.3 % by volume. Calculated microzooplankton wet weight varied from 0.84 to 1.80 g m-2 and corresponded to 9.9-18.1 % of net zooplankton weight. The relative abundance of microzooplankton to net zooplankton in this study is comparable to that previously reported in the tropical and subtropical Pacific Ocean, but a little higher than in oceanic subarctic areas.

    Original languageEnglish
    Pages (from-to)185-191
    Number of pages7
    JournalJournal of the Oceanographical Society of Japan
    Issue number4
    Publication statusPublished - 1983 Aug 1

    ASJC Scopus subject areas

    • Environmental Science(all)
    • Soil Science
    • Engineering(all)
    • Earth-Surface Processes
    • Earth and Planetary Sciences(all)


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