Manuscript Title: INVESTIGATIONS INTO BIOSONAR SOUND PRODUCTION IN THE BOTTLENOSE DOLPHIN (Tursiops truncatus ) Ted W. Cranford a) San Diego State University Wesley R. Elsberry National Center for Science Education Aaron Thode Scripps Institute of Oceanography Diane J. Blackwood Texas A&M University Received: Short title: Manuscript Title: INVESTIGATIONS INTO BIOSONAR SOUND PRODUCTION IN THE BOTTLENOSE DOLPHIN (Tursiops truncatus) Running title: Investigations into Biosonar Sound Production a) Current address: P.O. Box 6273, San Diego, CA 92166, USA; Electronic mail: tcranfor@mail.sdsu.edu 1