CORAL SPAWNING CRUISE 2010
August 29-September 1, 2010
aboard the R/V MANTA
Overview
Each year the coral spawning event is greatly anticipated by both researchers and recreational divers. This year's event was characterized as one of the best our researchers have ever seen.
In addition to documenting the timing of different spawning corals, this trip was also focused on collecting coral fragments for genetic studies, deploying coral recruitment racks, retrieving and redploying Semi-Permeable Membrane Devices (SPMDs) for oil spill response, collecting sediment and water samples for oil spill response, conducting fish counts, downloading accoustic receiver data, and retagging deep long-term monitoring stations.
The M/V Spree was also on site for the coral spawning with a boatload of recreational divers.
Participants
R/V Manta crew
Sanctuary research team
Dan Basta, ONMS Director
Tom Moore, NOAA NRDA Lead
Sarah Davies, University of Texas researcher
Eli Meyer, University of Texas
researcher
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Dan Basta recording temperature and salinity profies.
Photo: Schmahl/FGBNMS |
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Daytime Activities
Researchers spent part of their daylight hours replacing missing or damaged tags for repetitive photo stations in a deeper area of East Flower Garden Bank. They also photographed all of the stations.
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Marissa Nuttal retags a deep station at East Flower Garden Bank. Coral cover in this area reaches about 70 percent!
Photo: Schmahl/FGBNMS. |
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Researchers replaced number tags on several deep monitoring stations on the east flank of East Flower Garden Bank. Photo: Schmahl/FGBNMS. |
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Divers swim above the reef after re-tagging a research pin on the deeper flank of East Flower Garden Bank. A manta ray is just barely visible in the distance to the left. Photo: Schmahl/FGBNMS |
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Emma Hickerson and Marissa Nuttall make their way up from the deep monitoring stations at East Flower Garden Bank. Notice how the corals are plated out to maximize surface area to access light. Photo: Schmahl/FGBNMS |
Several manta rays were photographed on this trip and added to the manta catalog.
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One of two manta rays that visited the researchers during a dive at East Flower Garden Bank. This same manta was observed in this same area during coral spawning time last year. (See photo in Coral Spawning 2009 report)
Photo: Schmahl/FGBNMS |
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Tom takes a break from photographing a manta ray to be in someone else's photo. Photo: Schmahl/FGBNMS |
Divers also encountered two different sea turtles while working.
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A loggerhead sea turtle (Caretta caretta) swims above the sand flat located between buoys #4 and #5 at East Flower Garden Bank. Photo: Schmahl/FGBNMS |
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Tom Moore has a have a face to face with the loggerhead (Caretta caretta).
Photo: Tom Moore/NOAA |
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A hawksbill sea turtle (Eretmochelys imbricata). Photo: Tom Moore/NOAA |
Divers also retrieved and replaced the Semi-permeable Membrane Devices (SPMDs) at East and West Flower Garden Banks, and collected sediment samples. This is part of ongoing Natural Resource Damage Assessment (NRDA) in response to the Deepwater Horizon Oil Spill.
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Tom Moore, Dan Basta, G.P. Schmahl and Emma Hickerson deploy SPMDs at East Flower Garden Bank.
Photo: Nuttall/FGBNMS |
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2010 Spawning Observations
Sanctuary researchers were able to observe the coral spawning activities on the 7th and 8th nights after the full moon (August 30 & 31). Everyone reported that the release of gamete bundles (egg and sperm packets) was spectacular.
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Gamete bundles line the valleys of the symmetrical brain coral (Diploria strigosa). Photo: Schmahl/FGBNMS |
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Montastraea franksi, a star coral, with gamete bundles "set" in the coral polyps' mouths just before they are released. The ruby brittle star (Ophioderma rubicundum) is probably waiting to catch some of the bundles for food.
Photo: Schmahl/FGBNMS |
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Gamete bundles just as they are released by this star coral species. Photo: Schmahl/FGBNMS |
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The same star coral a few moments later as the gamete bundles start to float upward. Photo: Schmahl/FGBNMS |
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Montastraea faveolata, another star coral, releases its gamete bundles. Photo: Schmahl/FGBNMS |
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Dan Basta observes coral spawn in the water column. This event is often described as an underwater snowstorm. Photo: Schmahl/FGBNMS |
Of course, other animals are also out and about on the reef at night.
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A long spined sea urchin (Diadema antillarum) and night shrimp. Photo: Schmahl/FGBNMS |
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A coral clinging crab (Mithrax hispidus) sitting between several coral colonies. Photo: Schmahl/FGBNMS |
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A white version of a long-spined sea urchin (Diadema antillarum). Photo: Schmahl/FGBNMS |
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A ruby brittle star (Ophioderma rubicundum) collects gamete bundles for food. Photo: Schmahl/FGBNMS |
A Visit to High Island A389A
Part of the expedition included a visit to High Island A389A, the only oil and gas production platform inside sanctuary boundaries. This platform is located about one mile from the coral cap at East Flower Garden Bank.
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Oil and gas production platforms are popular dive sites in the Gulf of Mexico. This one, HIA389A, lies within sanctuary boundaries at East Flower Garden Bank.
Photo: Schmahl/FGBNMS |
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The support structure under oil and gas production platforms is often extensive. These hard surfaces provide places for organisms to attach and
form artifical reefs. Photo: Schmahl/FGBNMS |
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Platform HIA389A was installed in 1981, many years before the sanctuary was designated. It is now covered with colorful organisms such as sponges, hydroids,
and
barnacles. Photo: Schmahl/FGBNMS |
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University of Texas researchers Sarah Davies (left) and Eli Meyer (right) attach tiles to the platform structure as part of a coral recruitment study. Tom Moore is taking photos in the background. Photo: Schmahl/FGBNMS |
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Scrawled filefish (Aluterus scriptus) are common residents around the artificial reefs on platforms.
Photo: Schmahl/FGBNMS |
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A large group of chub (Kyphosus sp.) school under the platform. Photo: Schmahl/FGBNMS |
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Dan Basta hovers inside the underwater structure of platform HIA389A. Photo: Schmahl/FGBNMS |
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This silky shark swimming outside the platform structure had a hook and leader line trailing from its mouth.
Photo: Schmahl/FGBNMS |
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This manta hung around the divers for their entire dive at HIA389A.
Photo: Schmahl/FGBNMS |
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General Coral Spawning Information
For general information about the annual mass coral spawning event, please visit our Coral Spawning page.
For summaries and reports from other spawning seasons, please use the links below:
2009 Coral Spawning
2008 Coral Spawning
2007 Coral Spawning
2006 Coral Spawning
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