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Free Content Predator-Prey Interactions between Gray Triggerfish (Balistes Capriscus Gmelin) and a Guild of Sand Dollars Around Artificial Reefs in the Northeastern Gulf of Mexico

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Abstract:

Densities of sand dollars (Encope michelini Agassiz, Mellita tenuis Leske, Leodia sexiesperforata Leske, Clypeaster subdepressus Gray) were sampled with increasing distance from four artificial reefs in the northeastern Gulf of Mexico from April through August 1991. I tested the hypothesis that gradients of prey (sand dollar) densities differ between reefs of different spatial configurations occupied by a known predator, the gray triggerfish (Balistes capriscus). I observed a significant, positive relationship between sand dollar density and distance from reefs and qualitative differences in sand dollar densities between reefs of different spatial configurations. Experiments using three species of tethered sand dollars (Encope michelini, Mellita tenuis, Leodia sexiesperforata) suggest gray triggerfish prefer M. tenuis and L. sexiesperforata over E. michelini and have an approximate foraging radius of 20 m from reefs where refugia are aggregated and 30 m or further at reefs where refugia are dispersed.

Document Type: Research Article

Publication date: January 1, 1995

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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