Researchers and volunteers from REEF, along with staff from the Cayman Islands Department of the Environment, have just wrapped up another year of study on Nassau grouper spawning as part of the Grouper Moon Project. Our work this year focused on the spawning aggregation in Little Cayman, which is the largest (and one of just a few) known remaining aggregations of Nassau grouper in the Caribbean. Highlights from this year’s work include:
- REEF launched the Baby Grouper Adrift! webpage, which shows the results of state-of-the-art satellite drifter research being conducted. Working with scientists from Oregon State University, the Adrift project aims to better understand where Nassau grouper larvae end up after being spawned. Webpage visitors can follow the current drifters in real time as they complete a 45-day ocean journey (the amount of time Nassau grouper larvae spend floating in the currents), and even take a guess where the drifters will end up. Visit the webpage at http://www.REEF.org/programs/grouper_moon/adrift
- In addition to copious amounts of Nassau grouper spawning documented in both January and February, several hundred tiger grouper were seen spawning over multiple evenings in February. Watch this video to see the tigers spawning! http://www.REEF.org/reef_files/REEF2011TigerGrouperSpawning.mov
Here's video of the Nassau grouper -- http://www.reef.org/reef_files/REEF2011NassauGrouperSpawning.mov
- World-famous marine life artist and conservationist, Guy Harvey, accompanied the Grouper Moon team this year to film a documentary on the project.
- The current Our World Underwater scholar, Josh Stewart, joined the project to help document our research. Josh will be working with REEF over the next several months to develop outreach materials that educate the public on the importance of spawning aggregations. To read more about Josh’s year as an OWU scholar, check out his blog – http://owussnorthamerica.org/
- Wayne Sullivan once again donated his time and his vessel, the Glen Ellen, along with her crew, to support tech diving operations. This year, they helped answer many unknowns at the Little Cayman site, including how deep the Nassau grouper are found during the day and during spawning (at least 150 feet), and whether the fish spawn after dark (yes!).
2011 is a critical year for the Nassau grouper of the Cayman Islands. An 8-year ban on fishing at spawning aggregations is due to expire this year. Sometime in early spring, members of the Cayman Islands Marine Conservation Board and the CI Government will be deciding what, if any, protections will be enacted to replace the expiring ban. Based on research findings generated over the last 9 years, we know that Nassau grouper only reproduce during their spawning season (winter months around the full moons). The research has also shown that prohibiting fishing during the spawning season has resulted in higher numbers of this endangered species in Cayman waters, benefiting everyone, including future generations of Caymanians, divers and snorkelers, and fishermen. A healthy population of Nassau Grouper is also critical for healthy and productive coral reefs. The government is seeking input on extending protections. To provide feedback, send a letter to: Gina Ebanks-Petrie, Director, Department of the Environment, Cayman Islands Government, PO Box 486, Grand Cayman KY1-1106, Cayman Islands, Gina.Ebanks-Petrie@gov.ky
Many Thanks! The Grouper Moon Project wouldn’t be possible without the dedication, passion, and financial support from many individuals, Cayman Island businesses, and foundations. It truly takes a village to pull off this conservation research project. Visit our supporters page to see the full list.