1. Department of Biology, Texas A&M University, College Station, TX 77843-3258 (IFG, SEC, MLW)
2. Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX, 77843-3258 (RLH)
3. Present address of SEC: Department of Biology, Centenary College of Louisiana, 2911 Centenary Boulevard, Shreveport, LA 71134
4. Present address of MLW: Department of Environmental Science, University of Evansville, 1800 Lincoln Avenue, Evansville, IN 47714
5. Present address of RLH: Natural Science Division, Pepperdine University, Malibu, CA 90263