1. Department of Life Sciences, Texas A & M University—Corpus Christi, Corpus Christi, TX 78412, USA
2. Psychology Department, New College of Florida, Sarasota, FL 34243, USA
3. Sarasota Dolphin Research Program, Brookfield Zoo Chicago, Sarasota, FL 34236, USA
4. National Oceanic and Atmospheric Administration, Southeast Fisheries Science Center, Marine Mammal and Turtle Division, Pascagoula, MS 39567, USA