CS12 Coral Reefs
Date: Wednesday, June 12, 2002
Time: 5:00:00 PM
Location: Colwood
 
Guest JR, Dept. Biological Sciences, National University of Singapore, Singapore, jrguest@atozasia.com
Goh, B, P, Dept. of Natural Sciences, National Institute of Education, Singapore, bgoh@nie.edu.sg
Chou, L, M, Dept. Biological Sciences, National University of Singapore, Singapore, dbsclm@nus.edu.sg
 
REPRODUCTION OF THE CORAL DIPLOASTREA HELIOPORA (SCLERACTINIA, FAVIIDAE) ON A LOW LATITUDE REEF IN SINGAPORE
image
Singapore is a small island located at the southern tip of Peninsular Malaysia, approximately 1 degree north of the equator, in the South China Sea. The reef building coral Diploastrea heliopora is found in relative abundance on coral reefs to the south of Singapore. These reefs are subjected to high levels of turbidity and sedimentation. Very little is known about the reproductive cycles of scleractinian corals in Southeast Asia or in equatorial regions. Preliminary studies carried out in Singapore in 1999 and 2000 showed that D. Heliopora was gonochoric and had an annual gametogenic cycle, with gonads maturing in late March to early April. The aim of this study was to ascertain the reproductive strategy, to describe the full gametogenic cycle and to monitor spawning of this species in situ around Singapore. Samples of D. heliopora were collected monthly from 6 to 12 colonies at three different reefs between February 2001 and April 2002. Additionally, the fecundity of corals close to the time of spawning was compared between sites that experience varying levels of sedimentation and turbidity.