1. Department of Natural Resources and Environmental Sciences; University of Illinois at Urbana-Champaign; 1102 S. Goodwin Ave Urbana IL 61801 U.S.A.
2. Shark Research and Conservation Program; Cape Eleuthera Institute; Eleuthera The Bahamas
3. John H. Prescott Marine Laboratory; New England Aquarium; Central Wharf Boston MA 02110 U.S.A.