Robert K. Bonde 2012 Review of: Ecology and conservation of the sirenia: dugongs and manatees. Helene Marsh, Thomas J. O'Shea and John E. Reynolds III. Cambridge University Press, Cambridge, 2012, 521 pp, ISBN 978-0-521-88828-8, US$135 and 978-0-521-71643-7, US$65. application/pdf 10.1890/BR12-41.1 en ESA Ecology for conserving our sirenians article