REEF scientists and volunteers just wrapped up another season of the Grouper Moon Project, a collaborative research effort with the Cayman Islands Department of the Environment (CIDOE). Our research focuses on Little Cayman, which has one of the largest (and one of just a few) known spawning aggregations of Nassau grouper in the Caribbean. Over 4,000 grouper amass in one location for 7-10 days following winter full moons. Since 2002, REEF and our partners at CIDOE and Oregon State University have used state-of-the-art technology, as well as good old fashioned diver surveys, to study this amazing natural phenomenon and the research has yielded ground-breaking results. It was a very exiting year - we documented significantly higher numbers of fish at the site than in previous years (we are estimating that the aggregation has surpassed 4,000 fish), there were a lot of small fish this year (6-8 year olds, coming to spawn for the first time), and there are hundreds of juvenile (young-of-the-year) Nassaus throughout the shallow habitats around Little Cayman (a result of 2011 spawning). Also this year, with support from the Disney Wildlife Conservation Fund, we initiated an education program to introduce local children to the ecological, economic, and cultural role that Nassau grouper have in the Cayman Islands and wider Caribbean. An integrated marine science curriculum is being developed with a focus on two age groups (Grade 4 and Grade 11), that includes a series of classroom lessons and live from the field web sessions, including a live-feed from 80 feet on the aggregation. We are working with educator, Todd Bohannon, and piloting this program with Cayman Prep school on Grand Cayman.
Other highlights from Grouper Moon 2012:
- To raise awareness about the importance of spawning aggregations and the iconic Nassau grouper, we hosted documentary crews and underwater photographers to help capture the magical scenes of spawning and document our research. Dr. Guy Harvey, famed marine artist, is putting the finishing touches on "Mystery of the Grouper Moon", an hour-long show that will air later this year. A crew from the PBS series "Changing Seas" is producing an episode about the conservation impacts of our research. Paul Humann, REEF co-founder and marine life photographer, was on hand to document REEF's work in this important project. And Jim Hellemn brought his custom camera rig to generate wide-angle panorama images of the aggregation. These will be used to "immerse" the viewer into the aggregation at public displays.
- On spawning nights, samples of fertilized eggs were collected to use in future genetic work, to better understand spawning patterns and inter-conectedness between Nassau grouper populations throughout the Caribbean.
- Cynthia Shaw, author of the book "Grouper Moon", joined the REEF team both in the field and in the classroom this year. As a scientific illustrator, Cindy lent her expertise to helping document the details of juvenile Nassau gropuer habitat and led our Cayman Prep classrooms in drawning Nassau grouper. Cindy's book is now available in the REEF online store here.
- Research findings from the project, describing the timing and behavior of color phases on spawning in Nassau grouper, was published in a recent issue of the scientific journal Current Zoology. You can read this paper online here.
- A short compilation of underwater footage from the spawning aggregation is posted on YouTube here.
This year's effort came on the heals of the 11th hour extension of protections for the spawning aggregations in the Cayman Islands. An 8-year ban that prohibits fishing at the aggregation sites during the reproductive season, originally implemented in 2003, was extended for eight more years in December 2011. The extension, enacted by the Marine Conservation Board, was in response to recommendations made by the CIDOE based on research findings of the Grouper Moon Project, showing that full protections during spawning season are critical to the long-term survival of this iconic species in the Cayman Islands. The Cayman Ministry may soon review a package of more thorough legislation that would enact seasonal closures for Nassau grouper during reproductive time (rather than only protecting the few spots on the map of known spawning sites).
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 the Grouper Moon page to see the full list - http://www.REEF.org//groupermoonproject. If you would like to support this important marine conservation program, please donate to REEF - https://www.reef.org/contribute.