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Marshall, Christopher D.; Reep, Roger Lyons
(detail)
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1995 |
Manatee cerebral cortex: cytoarchitecture of the caudal region in Trichechus manatus latirostris.
Brain Behav. Evol.
45: 1-18. 11 figs.
–Maps and describes cortical areas in the caudal region, and discusses their possible functional roles.
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Marshall, Christopher D.
(detail)
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1996 |
The West Indian manatee in Florida.
Isana-Kai: Cetaceans, Pinnipeds and Sirenians
(Tokyo)
24(24): 6-10.
–Gen. acc. of manatee biology, ecology, and physiology and of threats to manatee survival in Florida, written for a Japanese popular science magazine.
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Marshall, Christopher D.; Clark, L. A.; Reep, Roger Lyons
(detail)
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1998 |
The muscular hydrostat of the Florida manatee (Trichechus manatus latirostris): a functional morphological model of perioral bristle use.
Mar. Mamm. Sci.
14(2): 290-303. 3 figs. Mar. 31, 1998.
–Describes the anterior facial muscles in serial section; recognizes a new muscle (M. centralis nasi); shows that these muscles meet the definition of a muscular hydrostat; and hypothesizes a sequence of muscle contractions to explain the observed movements of the snout and bristles while feeding. See also Reep et al. (1998) and Marshall et al. (1998).
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Marshall, Christopher D.; Huth, Glenn D.; Edmonds, Virginia M.; Halin, Deborah L. ("D. M. Halin"); Reep, Roger Lyons
(detail)
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1998 |
Prehensile use of perioral bristles during feeding and associated behaviors of the Florida manatee (Trichechus manatus latirostris).
Mar. Mamm. Sci.
14(2): 274-289. 4 figs. Mar. 31, 1998.
–Reports observations of captive and wild manatees feeding on 6 species of aquatic plants, attempting to manipulate inanimate objects, and in social interactions. Describes details of both prehensile and tactile lip and vibrissal movements. See also Reep et al. (1998) and Marshall, Clark & Reep (1998).
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Reep, Roger Lyons; Marshall, Christopher D.; Stoll, M. L.; Whitaker, D. M.
(detail)
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1998 |
Distribution and innervation of facial bristles and hairs in the Florida manatee (Trichechus manatus latirostris).
Mar. Mamm. Sci.
14(2): 257-273. 3 tabs. 8 figs. Mar. 31, 1998.
–Describes 6 distinct fields of perioral bristles, density of hair on the face vs. the body, and, in general, the anatomical basis of bristle use during feeding and tactile exploration. See also Marshall et al. (1998) and Marshall, Clark, & Reep (1998).
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Marshall, Christopher D.; Kubilis, Paul S.; Huth, Glenn D.; Edmonds, Virginia M.; Halin, Deborah L.; Reep, Roger L.
(detail)
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2000 |
Food-handling ability and feeding-cycle length of manatees feeding on several species of aquatic plants.
Jour. Mamm.
81(3): 649-658. 3 tabs. 3 figs. Aug. 18, 2000.
–Captive experiments on Florida manatees using Hydrilla, Myriophyllum, Vallisneria, Syringodium, & Thalassia quantified variations in handling time according to plant species. Plants with tubular stems & numerous branches were consumed faster than ones with flat blades.
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Reep, Roger Lyons; Stoll, M. L.; Marshall, Christopher D.; Homer, B. L.; Samuelson, Don A.
(detail)
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2001 |
Microanatomy of facial vibrissae in the Florida manatee: the basis for specialized sensory function and oripulation.
Brain Behav. Evol.
58(1): 1-14. 3 tabs. 5 figs.
–Notice: New Scientist, Mar. 23, 2002: 27, 1 fig. Describes the vibrissae and their blood & nerve supply. Confirms that all the facial hairs & bristles are vibrissae (sinus hairs); that these have a distinct combination of attributes in each of the 9 regions of the face; that the perioral bristles have both tactile sensory and prehensile roles (a combination of functions unique to sirs.); and that the facial vibrissae may play a role in hydrodynamic distance reception.
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Reep, Roger Lyons; Marshall, Christopher D.; Stoll, M. L.
(detail)
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2002 |
Tactile hairs on the postcranial body in Florida manatees: a mammalian lateral line?
Brain Behav. Evol.
59: 141-154. 2 tabs. 9 figs.
–Describes the distribution and microanatomy of the postcranial hair follicles. All hairs are tactile sinus hairs innervated by 20-50 axons; they are arranged and constructed appropriately to detect water currents and possibly the presence of other animals or objects in the environment.
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Marshall, Christopher D.; Maeda, Hiroshi; Iwata, Matsumitsu; Furuta, Masami; Asano, Shiro; Rosas, Fernando César Weber; Reep, Roger Lyons
(detail)
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2003 |
Orofacial morphology and feeding behaviour of the dugong, Amazonian, West African, and Antillean manatees (Mammalia: Sirenia): functional morphology of the muscular-vibrissal complex.
Jour. Zool.
259(3): 245-260. 2 tabs. 7 figs. Mar. 2003.
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Bibliography and Index of the Sirenia and Desmostylia 