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Sleeping mound construction using coral fragments by the rockmover wrasse

Authors

  • S. Takayanagi,

    1. Department of Bioresource Science and Technology, Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi–Hiroshima 739-8528, Japan
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  • Y. Sakai,

    Corresponding author
    1. Department of Bioresource Science and Technology, Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi–Hiroshima 739-8528, Japan
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  • H. Hashimoto,

    1. Department of Bioresource Science and Technology, Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi–Hiroshima 739-8528, Japan
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  • K. Gushima

    1. Department of Bioresource Science and Technology, Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi–Hiroshima 739-8528, Japan
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*Tel.: +81 824 24 7941; fax: +81 824 22 7059; email: sakai41@hiroshima-u.ac.jp

Abstract

The rockmover wrasse Novaculichthys taeniourus was observed using coral fragments for mound construction on the reefs of Kuchierabu-jima Island, Japan. The wrasse heaped between four and 71 pieces of coral fragments on each sand mound, and dived into the mound just before sunset. Coral fragments may facilitate the retention of sleeping sites under competition with other sand-diving wrasses.

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