Skip to main content
padlock icon - secure page this page is secure

Free Content Aspects of Sexual Reproduction and Larval Development in the Shallow Water Hermatypic Coral, Goniastrea Australensis (Edwards and Haime, 1857)

Download Article:
(PDF 3,294.5 kb)
Sexual reproduction and larval development in Goniastrea australensis, a shallow water hermatypic coral, were studied from September 1977 to November 1980 on Heron Island reef, Australia. G. australensis is a simultaneous hermaphrodite with ovary and testis intermingled on the same mesentery. Gonad development occurred synchronously within and between colonies. An annual spring spawning season of approximately 2 days was observed. Gametes were released between 1600–1800 h on neap low tides between the full and last quarter moon phases. Fertilization is probably external; eggs from a single polyp were released in clumps held together by mucus and sperm were freely released. Egg clumps were negatively buoyant and sticky, adhering to objects when contact was made. Sperm and eggs were usually released simultaneously from the same polyp. Laboratory experiments indicated that self-fertilization was possible with apparently normal larval development and settlement. In aquaria ciliated larvae developed in approximately 2 days and settlement commenced 17 days after spawning. Reproduction began in colonies with an arithmetic mean radius of 1.5–2.0 cm, aged 4+ years.

While G. australensis did not planulate, the mode and timing of spawning and larval development substantiated Stimson's (1978) hypothesis that the mode of reproduction in hermatypic corals may be related to habitat, but not his prediction that corals characteristic of the reef flat would begin to sexually reproduce at an early age and planulate.

22 References.

No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 01 July 1981

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more