Coral Reefs

, Volume 27, Issue 1, pp 117–122 | Cite as

Gametogenesis, spawning and fecundity of Platygyra daedalea (Scleractinia) on equatorial reefs in Kenya

Note

Abstract

The reproductive ecology of the hermaphroditic broadcast spawning scleractinian reef coral Platygyra daedalea was studied on lagoonal reefs in Kenya. While single annual gametogenic cycles occurred in 84% of colonies, biannual gametogenic cycles were recorded in 16% of colonies and these patterns occurred in two morphotypes. In colonies with a single annual cycle, oogenesis occurred for 6–7 months from September to March and spermatogenesis for 5 months from November to March. In biannually spawning colonies, oogenic cycles overlapped for at least 2 months prior to gamete release. The major spawning period occurred in February and March, with minor spawning also occurring in August–October in biannually spawning colonies. Reproductive effort was lower during the minor winter compared to the major summer spawning, with fewer colonies reproducing (12.5–19.2%), not all mesenteries producing oocytes (32.5%) and less than half of the mesenteries with mature oocytes had associated spermaries (48.1%).

Keywords

Coral Sexual reproduction Equatorial reefs Indian Ocean 

References

  1. Babcock RC, Bull GD, Harrison PL, Heyward AJ, Oliver JK, Wallace CC, Willis BL (1986) Synchronous spawnings of 105 scleractinian coral species on the Great Barrier Reef. Mar Biol 90:379–394CrossRefGoogle Scholar
  2. Guest JR (2004) Reproductive patterns of scleractinian corals on Singapore’s reefs. Ph.D. thesis, National University of Singapore, p 192Google Scholar
  3. Harrison PL, Wallace CC (1990) Reproduction, dispersal and recruitment of scleractinian corals. In: Dubinsky Z (ed) Ecosystems of the world: coral reefs, vol 25. Elsevier, Amsterdam, pp 133–207Google Scholar
  4. Harrison PL, Babcock RC, Bull GD, Oliver JK, Wallace CC, Willis BL (1984) Mass spawning in tropical reef corals. Science 223:1186–1189PubMedCrossRefGoogle Scholar
  5. Harrison PL, Booth DJ (2007) Coral reefs: naturally dynamic and increasingly disturbed ecosystems. In: Connell SD, Gillanders BM (eds) Marine ecology. Oxford University Press, Melbourne, pp 316–377Google Scholar
  6. Heyward AJ, Collins JD (1985) Growth and sexual reproduction in the scleractinian coral Montipora digitata (Dana). Aust J Mar Freshw Res 36:441–446CrossRefGoogle Scholar
  7. Mangubhai S, Harrison PL (2006) Seasonal patterns of coral reproduction on equatorial reefs in Mombasa, Kenya. Proc 10th Int Coral Reef Symp 1:106–114Google Scholar
  8. Mangubhai S, Souter P, Grahn M (2007a) Phenotypic variation in coral Platygyra daedalea in Kenya: morphometry and genetics. Mar Ecol Prog Ser (in press)Google Scholar
  9. Mangubhai S, Harrison PL, Obura DO (2007b) Patterns of coral larval settlement on lagoonal reefs in the Mombasa Marine National Park and Reserve in Kenya. Mar Ecol Prog Ser (in press)Google Scholar
  10. Miller KJ (1994) Morphological species boundaries in the coral genus Platygyra: environmental influences and taxonomic implications. Mar Ecol Prog Ser 110:19–28CrossRefGoogle Scholar
  11. Oliver JK, Babcock RC, Harrison PL, Willis BL (1988) Geographic extent of mass coral spawning: clues to ultimate causal factors. Proc 6th Int Coral Reef Symp 2:803–810Google Scholar
  12. Shlesinger Y, Loya Y (1985) Coral community reproductive patterns: Red Sea versus the Great Barrier Reef. Science 228:1333–1335PubMedCrossRefGoogle Scholar
  13. Stobart B, Babcock RC, Willis BL (1992) Biannual spawning of three species of scleractinian coral from the Great Barrier Reef. Proc 7th Int Coral Reef Symp 1:494–499Google Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Coral Reef Research Centre, School of Environmental Science and ManagementSouthern Cross UniversityLismoreAustralia

Personalised recommendations