Journal of the Japanese Coral Reef Society
Online ISSN : 1882-5710
Print ISSN : 1345-1421
ISSN-L : 1345-1421
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  • Ken OKAJI, Keiji ITO, Tomofumi NAGATA, Yoshimi HIGA, Akifumi TSUHA
    2020 Volume 22 Issue 1 Pages 1-6
    Published: 2020
    Released: September 19, 2020
    JOURNALS FREE ACCESS

    The growth of five species of Acropora, A. tenuis, A. hyacinthus, A. digitifera, A. donei, A. valenciennesi, transplanted on the reef of Maeganeku, Okinawa, Japan, was monitored during a coral restoration program implemented by the Okinawa Prefectural Government. The major/minor axis length and projected area of identified coral transplants were measured using photographs taken every six months period between 2014 and 2016. The geometrically estimated area of each transplant species, which was calculated by major/minor axis length, was strongly correlated with the projected area, although the former was overestimated (8.1±1.1% for A. tenuis, 5.4±0.9% for A. hyacinthus, 9.2±1.0% for A. digitifera, 18.5±2.1% for A. donei, and 16.9±1.9% for A. valenciennesi, mean±SE). It was found from the growth equations that the growth of A. tenuis, A. digitifera and A. donei seemed to reach a determinate phase in 2 to 3 years after transplantation, while A. hyacinthus and A. valenciennesi continued their growth. Information regarding the growth of transplanted corals obtained in this study enables various entities assisting the design of a coral transplantation project, including a period required for human intervention, as well as the transplant densities and projected coral cover.

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