Bibliography and Index of the Sirenia and Desmostylia  

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"Bengtson, John L."

Bengtson, John L.: SEE ALSO Medway, Bruss et al., 1982. (detail)
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 Bengtson, John L.; Magor, Diana Marion (detail)
   
1979
A survey of manatees in Belize.
Jour. Mamm. 60(1): 230-232. 1 tab. 1 fig. Feb. 20, 1979.
–A total of 101 manatee sightings were made in 5 days of aerial survey.
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 Bengtson, John L. (detail)
   
1982
Ecology of manatees (Trichechus manatus) in the St. Johns River, Florida. [Abstr.]
Dissert. Abstrs. Internatl., B. Sci. Eng. 42(12): 4668. June 1982.
–Describes daily and seasonal movements in response to temperature; reports that males patrol large ranges in search of estrous females, which have relatively small home ranges; mentions observations on daily activity patterns; suggests that behavioral tradition may be important in manatee populations; and reports that manatees failed to show a preference among 4 species of food plants offered them in experimental trials.
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 Medway, William; Bruss, M. L.; Bengtson, John L.; Black, D. J. (detail)
   
1982
Blood chemistry of the West Indian manatee (Trichechus manatus).
Jour. Wildl. Diseases 18(2): 229-234. 3 tabs. Apr. 1982.
–Blood of 8 wild manatees from Blue Spring, Florida, and 2 captives was similar to samples analyzed by White et al. (1976), but with increased anion gaps, protein, and albumin/globulin ratios. Some values were probably affected by the animals' struggling. A narrow range of serum osmolality may reflect the Blue Spring population's freshwater habitat.
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 Bengtson, John L. (detail)
   
1983
Estimating food consumption of free-ranging manatees in Florida.
Jour. Wildl. Manage. 47(4): 1186-1192. 3 tabs. 1 fig.
–A study, partly experimental, of chewing rate and food consumption at Blue Spring and the St. Johns River indicated an estimated consumption rate of 108 g/min and 4-9% of body weight per day. The highest rates were observed just before winter.
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 Bengtson, John L.; Fitzgerald, Shannon M. (detail)
   
1985
Potential role of vocalizations in West Indian manatees.
Jour. Mamm. 66(4): 816-819. 2 figs. Nov. 29, 1985.
–Reports correlations between number of calls and various behaviors of manatees in Blue Spring and the St. Johns River, Florida. Concludes that vocalizations are mainly social and communicative in function, not navigational. Notes the possible use of vocalizations for alarm, greeting, and synchronizing of breathing, and estimates the distances at which manatees can hear various sounds.
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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