1. Department of Marine Science Coastal Carolina University Conway SC 29528 U.S.A.
2. UF/IFAS Nature Coast Biological Station University of Florida P.O. Box 878, Cedar Key FL 32625 U.S.A.
3. San Marcos Aquatic Resources Center U.S. Fish & Wildlife Service 500 East McCarty Lane, San Marcos TX 78666 U.S.A.