Short-term temporal variation in gelatinous zooplankton populations over 48 hours in a coral reef at Redang Island, Malaysia

Authors

  • Ryota Nakajima,

    Corresponding author
    1. Marine Biodiversity Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa, Japan
    • Correspondence

      Ryota Nakajima, Marine Biodiversity Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan.

      E-mail: nakajimar@jamstec.go.jp

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  • Dhugal J. Lindsay,

    1. Marine Biodiversity Research Program, Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa, Japan
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  • Teruaki Yoshida,

    1. Faculty of Science & Technology, Marine Ecosystem Research Centre, Univeriti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
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  • Bin Haji Ross Othman,

    1. Faculty of Science & Technology, Marine Ecosystem Research Centre, Univeriti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
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  • Tatsuki Toda

    1. Department of Environmental Engineering for Symbiosis, Faculty of Engineering, Soka University, Hachioji, Tokyo, Japan
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Abstract

Gelatinous zooplankton abundance and species composition were investigated at 3-h intervals for a 48-h period at a fringing reef in Malaysia. A total of 20 gelatinous zooplankton species were observed; the community was dominated by the calycophoran siphonophore Diphyes chamissonis (79.9%), followed by the trachymedusdae Aglaura hemistoma (5.6%) and Liriope tetraphylla (4.8%). The gelatinous zooplankton were not collected in the water column during most of the daytime hours (1200, 1500 and 1800 h) but were common during the night. However, an abrupt peak in abundance was found at 0900 h on the second day. The times of appearance at night were different depending on the species, and the number of species was also different depending on the hour of sampling. Sampling at 3-h intervals over a 48-h period revealed that the temporal variation (or sampling availability) was large in this study. Careful consideration should be given to the sampling variability in handling the gelatinous zooplankton samples in coral reef areas.

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