Acknowledgements

We would like to thank the U.S. Fish & Wildlife Service, above all, Nicole Adimey, Wildlife Biologist for the Manatee Rescue, Rehabilitation and Release Program, for allowing us to conduct research on captive Florida manatees. These studies are administered under U.S. Fish & Wildlife Services license #'s MA136049-0 and MA136049-1.

We would also like to thank the Cincinnati Zoo & Botanical Garden, for allowing us the use of their facilities and for their cooperation with the research, notably the current and former manatee keepers: Jamey Vogel, Chris Edelen, Lindsay Garrett, & Lisa Kindell.

We would like to express our deep appreciation for Time Warner Cable in Cincinnati, Ohio, above all, Pam McDonald, for their assistance with our remote vocalization studies.

We would also like to thank Lindsay Garrett for the manatees drawn for our research logo.

We would like to thank the Columbus Zoo & Aquarium for allowing us the use of their facilities and for their cooperation with the research.

Finally, we would like to express our thanks to the U.S. Navy Undersea Warfare Center, Newport RI, for the rental of the transducers used in our studies.