Abstract
A coral settlement device was used to examine recruitment patterns of Acropora at two stations (st.; A and B) in Bunaken Island, Manado. The recruitment timing of Acropora was not determined because of mixing with Isopora. A marine block (MB) was used to observe the growth of settled acroporid corals at st. A. Within a year of settlement (February–May of the following year), the corals which had settled on the MB had grown to a size of 13.4 ± 5.86 mm. They were dominated by Isopora, with a small proportion of Acropora. A supplementary experiment again using the MB was conducted at three other sites (st. C, D, E) where Isopora was not abundant. The size of the corals which settled on the MB was nearly the same as that of the corals at st. A. Juvenile Acropora corals (≤3 cm, encrusting form) were measured on the Manado coast (st. F) between February and May. At this site, Acropora corals were dominant and no Isopora corals were observed; the size of Acropora was 18.5 ± 5.01 mm. Acroporid corals in February and March at st. A appeared smaller than those at st. F and grew to nearly the same size in early April.
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Acknowledgments
We thank the Ministry of Research and Technology of Indonesia, DGHE of Ministry of Education and Culture Indonesia, the Bunaken Marine National Park Authority, the Regional Development Planning Board, and the Marine Affairs and Fisheries Agency, Government of North Sulawesi for their collaboration in this study. We are grateful to Mr Atsunobu Sugita, Forestry Agency (former Master student of Tokyo University of Marine Science and Technology) for analyzing the CSDs. This study was funded by a Grant-in-Aid for Science Research (nos. 16211017 and 20241018) and a grant of the Steel Foundation for Environmental Protection Technology.
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Yap, M., Roeroe, K.A., Lalamentik, L.T.X. et al. Recruitment patterns and early growth of acroporid corals in Manado, Indonesia. Fish Sci 79, 385–395 (2013). https://doi.org/10.1007/s12562-013-0606-9
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DOI: https://doi.org/10.1007/s12562-013-0606-9