Marine scientists in the Florida Keys National Marine Sanctuary have documented the first known case where Atlantic-Caribbean, farm-raised coral has reproduced to serve as a foundation for future reefs.
The discovery is significant because it proves that cultured staghorn corals can not only survive, but also reach sexual maturity and naturally help with coral restoration, marine researchers said.
This is real exciting because this is the future of trying to rebuild these reefs, said Ken Nedimyer, president of the Coral Restoration Foundation and has been involved in coral restoration projects for the past nine years. What were trying to do is to put the girls and the boys back together in the same room so theyll make babies.
Both staghorn, as well as elkhorn corals, are classifed as threatened under the federal Endangered Species Act and historically are primary reef-building corals in Florida and the Caribbean.
Harvested staghorn gametes were taken to a shoreside laboratory for further research and theyll be used for laboratory fertilization projects with the aim of eventually transplanting offspring.
Under several federal research permits, Nedimyer harvested small inch-long fragments of live staghorn and planted them in a special nursery off the Upper Keys in the spring of 2006. Working with a different group of students In July 2007, the more mature clippings were transplanted in a section of sand at Molasses Reef where they have grown to about two feet in diameter.
Were growing a lot of corals in our nursery and we can replant them on some reefs, but we could never replant all corals on all the reefs, said Nedimyer. The goal is to get them reproducing successfully, so they can do what they used to do.
Nedimyer said that coral larvae are carried by ocean currents after they spawn, which in the northern hemisphere is usually a few days after the full moon in August or September.
Theres a broad dispersal of larvae, which is part of their reproductive strategy, he said. If the larvae survive long enough they could settle 10 miles from here (or) they could settle 50 miles from here.