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Apologies for the tardiness of this post, but the following are observations
of coral spawning within the Flower Garden Banks National Marine Sanctuary,
northwestern Gulf of Mexico (approximately 27 degrees 56 minutes north
latitude, 93 degrees 44 minutes west longitude).
<p>Two pronounced coral spawning events were witnessed this year, following
the full moon of August and September.
<p>Observations in this report are by Sanctuary staff (G.P. Schmahl, Emma
Hickerson, Jennifer DeBose, Kevin Buch), and Dr. Peter Vize (University
of Calgary); with additional contributions by Eric Borneman (University
of Houston) and James Wiseman. Times are given as local time - Central
Daylight Time (CDT).
<p><b>August</b>
<p>Full Moon: August 4, 2001, 12:56 am
<br>Observations were made on August 9, 10 and 11.
<p>August 9, 2001
<br>Montastrea franksi: 9:40pm - 10:00pm (many colonies)
<p>Other observations:
<br>Unidentified brittlestar (Ophioderma sp.) - female releasing eggs
<br>
<p>August 10, 2001
<br>Montastrea cavernosa males: 9:00pm - 9:35pm (a few colonies)
<br>Montastrea cavernosa females: 9:45pm (a few colonies)
<br>Diploria strigosa: 9:00pm - 10:30+pm (many colonies)
<br>Montastrea franksi: 9:45 pm - 10:30+pm (many colonies)
<p>Other observations:
<br>Spirobranchus giganteus (Christmas tree worm): 10:00pm - 10:18pm (few
male and female)
<br>Eunicid polychaete worms (Lysidice ninetta) in water column.
Collected specimens were full of gametes.
<br>
<p>August 11, 2001
<br>Diploria strigosa: 10:30+pm (very few colonies)
<br>Montastrea franksi: 10:20pm - 10:50pm (many colonies)
<br>Stephanocoenia michelinii: 10:30pm (1 male only)
<p>Other observations:
<br>Ophioderma rubicundum: 9:00pm - 10:20pm (many observed, but few displaying
female egg release behavior)
<br>
<p><b>September</b>
<p>Full moon: September 2, 2001, 4:43 pm.
<br>Observations were made on September 9 and 10.
<p>September 8, 2001 - No spawning reported by divers on the Sea Searcher,
a dive charter vessel with experienced coral observers from the Aquarium
of the Americas aboard.
<p>September 9, 2001
<br>Diploria strigosa: 9:05pm - 10:00+pm (many colonies)
<br>Montastrea franksi: 9:15pm - 10:00+pm (many colonies)
<br>Montastrea cavernosa males: 9:10pm - 9:15pm (2 colonies)
<br>Montastrea cavernosa females: 9:15pm - 9:30pm (2 colonies)
<p>Significant accumulation of coral gametes on the surface by 10:45pm
<p>September 10, 2001
<br>Diploria strigosa: 9:15pm - 10:06pm (many colonies)
<br>Montastrea franksi: 9:17pm - 9:54pm (many colonies)
<br>Stephanocoenia michelinii: 10:15pm - 10:25pm (few colonies - male and
female)
<p>Significant accumulation of coral gametes on the surface by 10:45pm
<p>No observations conducted on September 11.
<p>Notes:
<br>Very little spawning by Montastrea cavernosa in September.
<br>No spawning behavior observed by brittle stars or christmas tree worms
in September.
<p>--
<br>G.P. Schmahl
<br>Sanctuary Manager
<br>National Oceanic and Atmospheric Administration
<p>Flower Garden Banks National Marine Sanctuary
<br>216 W. 26th Street, Suite 104
<br>Bryan, TX 77803
<p>(979) 779-2705
<br>(979) 779-2334 (fax)
<br>george.schmahl@noaa.gov
<br><a href="http://www.flowergarden.nos.noaa.gov">http://www.flowergarden.nos.noaa.gov</a>
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