Bibliography and Index of the Sirenia and Desmostylia  

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"MacKenzie, Duncan S."

MacKenzie, Duncan S.: SEE Ortiz et al., 1998. (detail)
x
 
 Ortiz, Rudy M.; Worthy, Graham A. J.; MacKenzie, Duncan S. (detail)
   
1998
Osmoregulation in wild and captive West Indian manatees (Trichechus manatus).
Physiol. Zool. 71(4): 449-457. 4 tabs. 2 figs. July/Aug. 1998.
–Experiments manipulating water salinity and animals' access to fresh water were conducted on captive and wild-caught T. m. latirostris and T. m. manatus in Florida, Brazil, Colombia, and Puerto Rico. High aldosterone levels in wild freshwater animals may indicate a need to conserve sodium or to have access to marine habitats; captinve animals in fresh water may be susceptible to salt deficiency. High vasopressin levels in wild brackish-water manatees suggest use of an antidiuretic state to conserve water. Concludes that manatees are good osmoregulators regardless of the environment.
Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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