The utility and biases of the Roving Diver Technique (RDT) and transect visual surveys are evaluated for use in rapid assessments off southeastern Hispaniola. Both methods are similar in recording the most abundant species, while a greater number of rare species (especially fishery-targeted species) are recorded with the RDT. The methods are found to be complementary, and are suggested to be used together when conducting rapid assessments of fish assemblages, especially to detect over-fishing.
This report summarizes the first 8 years of data from 27 sites in the Sanctuary, approximately half of which were designated as no-take reserves in 1996.
This report summarizes the 2002 data from REEF's annual assessment of the Florida Keys National Marine Sanctuary. A total of 37 sites from Key Largo through the Dry Tortugas are monitored each year with REEF's Advanced Assessment Team, to evaluate status, trends and the effect of no-take reserves.
This paper is the result of a 1999 AGRRA expedition to the Cayman Islands coordinated by the Marine Education and Environmental Research Institute (MEERI). The paper uses the REEF database (over 1,200 surveys from the Cayman Islands) and the AGRRA fish data to provide an updated species list for the Islands, a comparison between islands (Grand Cayman and Little Cayman) and sites (33 sites), and an analysis of the relationships between herbivorous fishes and algal cover. Thanks to the REEF database, 44 species were added to the list of fishes known to occur on the Islands.
This paper reviews the role of partnerships in the success of REEF's program. Several examples of how REEF has used partnerships are presented. These include monitoring program parternships, data sharing and the use of data by others, the conservation contributions of the REEF program, and the educational component of partnerships.
This paper summarizes the finding from the 2002 REEF Grouper Moon Project, which documented the characteristics of a newly discovered Nassau grouper spawning aggregation. At its peak, over 5,000 Nassau grouper were present at the site. Significant contributions include the visual and video documentation of four nights of spawning of Nassau grouper, the description of crepuscular and lunar movements and color phase shifts in the grouper, and the documentation of courtship/spawning behavior in ten additional species.
Sightings data submitted to REEF's Exotic Species Sighting Program through 2002 are summarized in this paper. The data show a hot-spot of non-native marine fishes along south Florida (Broward and Palm Beach Counties). The authors evaluated potential vectors of introduction and pinpointed the aquarium trade as the likely source.
REEF data were one of three datasets used in the most recent stock assessment of the Goliath grouper, a species that is currently protected from harvest due to very low numbers in the 1980s. Because this species is not fished, fisheries managers must use fisheries-independent datasets and the REEF database represents a valuable source of this information.
This study used REEF data from Bonaire, an area where several thousand REEF surveys have been conducted, to evaluate patterns in species occurrence. Their results suggest that species interactions, and/or species-habitat relationships may be important behavioral attributes mediating the local structure of fish assemblages on these coral reefs. This work was also presented at the International Coral Reef Symposium in 2004.
This paper documents attacks by the isopod Excorallana tricornis tricornis on Nassau grouper caught in Antillian fish traps during the post-spawning season of Spring 2005. These findings were documented during Grouper Moon research by REEF and Cayman Islands Department of the Environment staff. Fish were being trapped in order to acoustically tag individuals from sites around Little Cayman Island in order to better understand what percentage of reproductive-size individuals attend the aggregation each year.