Summary
Reproductive ecology of four scleractinian species, Lobophyllia corymbosa, Favia favus, Porties lutea and Porites australiensis was studied for two years on a patch reef near Lizard Island. Two major reproductive patterns were found: L. corymbosa and F. favus were simultaneous hermaphrodites and released gametes over several days in summer; and P. lutea, and P. australiensis were dioecious and released gametes over several weeks to several months respectively, in summer. Three of the four species spawned predominantly in the lunar period between the full and last quarter moon. In all four species, ovaries began developing several months earlier than testes. Number of ova per colony varied greatly amongst the species and was inversely related to mature egg size. The results presented here contrast with earlier assumptions of almost uniform viviparity of corals and supports the generalization that a brief annual spawning period with larvae developing externally may prove to be the dominant form of sexual reproduction in hermatypic corals.
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Harriott, V.J. Reproductive ecology of four scleratinian species at Lizard Island, Great Barrier Reef. Coral Reefs 2, 9–18 (1983). https://doi.org/10.1007/BF00304727
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DOI: https://doi.org/10.1007/BF00304727