Coral spawning in SE Asia (fwd)

Evan Edinger eedinger at
Thu Jun 14 14:49:47 EDT 2001

In October, 1995, three of us observed a mass spawning of corals
in the
Karimunjawa Islands, Central Java.  We observed about 25 species
of corals
releasing eggs, sperm, or (usually) both, about 2 hours after
sunset a few
days after the full moon.  Our observations were published as an
in the 8ICRS (Panama, abstracts volume, p. 57), and as a data
table in
Thomascik, et al., 1997, The ecology of Indonesian Seas,
Singapore, table 7.3, p. 278.)

We made further observations on coral mass spawning in October,
1996, and
tried, without success, to capture eggs.

Our settling plates deployed in July and August 1995 had
acroporid and
pocilloporid spat, but we only observed mass spawning in October.

Wisnu Widjatmoko, of the Faculty of Fisheries and Marine Science,
Diponegoro University, Semarang, Central Java, has made
observations on coral spawning in the Java Sea, mainly about

Evan Edinger

Dr. Evan Edinger
Depts. of Geography & Biology		tel. (709) 737-3233
Memorial University of Newfoundland	fax. (709) 737-3119
St. John's, Nfld.			e-mail: eedinger at

---------- Forwarded message ----------
Date: Thu, 14 Jun 2001 13:56:49 -0400
From: David Browne <dbrown15 at>
To: James Rolfe Guest <scip9051 at>,
     James Rolfe Guest <scip9051 at>,
     "'jekstrom at'" <jekstrom at>,
     "'coral-list at'"
<coral-list at>,
     eedinger at
Subject: Re: Coral spawning in SE Asia


I observed coral spawning in the Karimunjawa Islands off
Indonesia 4 days after the full moon in October, 1997.  Evan
Edinger has
made further observations of coral spawning in this area.

Evan Edinger:  eedinger at

David Browne
PhD Candidate
Department of Biology
McGill University

Dear Julie and coral-list,
I can help with the one part of your second question regarding
spawning in South East Asia/Indonesia. Actually very little is
known about
the reproductive cycles of SE Asian corals. As far as I know, the
observation of a coral mass spawning in SE Asia is from the
Philippines in
May 1981 during the 4th International Coral Reef Symposium. The
published accounts come from the Philippines and from Singapore.
Bermas et
al (1992) report that a number of hard and soft corals in the
spawn between April and May. In Singapore Chou and Quek (1992)
reported that
Pocillopora damicornis releases planulae around the new moon each
Also in Singapore, I have done histological examination of
heliopora and Goniopora spp. I saw that D. heliopora contained
very mature
gametes in late March 2000 suggesting a late march or April
Conversely, Goniopora spp. contained very mature gametes in
October and
November 1999 and 2000 suggesting an October or November spawning
for that
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