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26 results for “Trichechus manatus”
FIGURE 6. SHSU 1-235 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 6. SHSU 1-235, mandibular symphysis with partial left dentary ramus in dorsal (A), ventral (B), and anterior (C) views. The shallow dorsoventral depth and low, rounded ventrally projecting boss (arrow) are diagnostic features of the extinct morphotype Trichechus manatus bakerorum. Scale bar equals 2 cm.
FIGURE 5. SHSU 1-231 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 5. SHSU 1-231, edentulous right anterior maxilla fragment in dorsal (A) and ventral (B) views. Note the resorbed anterior alveolar region typical of manatees. The rubber band was not removed because it was considered to be part of the history of the specimen. Scale bar equals 2 cm.
FIGURE 4. SHSU 1-027 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 4. SHSU 1-027, edentulous left dentary in lingual (A) and labial (B) views. Scale bar equals 2 cm.
FIGURE 1 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 1. Map showing manatee occurrences along the northwestern coast of the Gulf of Mexico. The two red stars mark the locations of fossil specimens from McFaddin Beach (to the northeast) and Corpus Christi Bay (to the southwest). The blue symbols indicate historical occurrences, including sightings (circles), caracasses (squares), and captured specimens (triangles). Historical distribution data are modified from Fertl et al. (2005). North at top.
Fig. 3 in Occurrence of endoparasites in wild Antillean manatees (Trichechus manatus manatus) in Colombia
Fig. 3. The phylogenetic tree including the here identified trematodes Chiorchis fabaceus and Nudacotyle undicola shows that they belong to the superfamilies Paramphistomatoidea and Pronocephaloidea, respectively. Fasciola hepatica (Fasciolidae) was used as the outgroup taxon.
Fig. 2 in Occurrence of endoparasites in wild Antillean manatees (Trichechus manatus manatus) in Colombia
Fig. 2. Illustrations of endoparasite stages identified in faecal samples of Antillean manatees (Trichechus manatus manatus) from Colombia: (A) Chiorchis fabaceus egg, (B) Eimeria manatus oocyst, (C) Eimeria nodulosa oocyst, (D) Nudacotyle undicola egg.
Fig. 1. A in Occurrence of endoparasites in wild Antillean manatees (Trichechus manatus manatus) in Colombia
Fig. 1. A) Clinical evaluation of a calf manatee as part of the conservation programme of the OMACHA Foundation in Colombia. B) Blood collection for health status evaluation. C) 'Ciénaga Grande de Lorica', Cordoba, flowers of water spinach (Ipomea aquatica), are a favorite manatee food.
Figure4 in Analysis of Behavioural Patterns of the Amazonian Manatee, Trichechus manatus manatus, under Human Care (Mammalia:Sirenia)
Figure4. Space use data of the manatee individuals linked to the referring numbers on the map; 1 - 10 deepwater zone (Z); 11/12 semi-deep-water zone (Y); 13/14 shallow-water zone (X)
Figure3 in Analysis of Behavioural Patterns of the Amazonian Manatee, Trichechus manatus manatus, under Human Care (Mammalia:Sirenia)
Figure3. Map of the manatee tank divided into grid squares, each filled with similar volume of water; 1 - 10 deep-water zone (Z); 11/12 semi-deep-water zone (Y); 13/14 shallow-water zone (X)
FIGURE 2. TxVP 46040-9 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 2. TxVP 46040-9, thoracic vertebral centrum. Dorsal to top. Scale bar equals 2 cm.
FIGURE 3. SHSU 1-236, distal rib fragment. Scale bar equals 2 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 3. SHSU 1-236, distal rib fragment. Scale bar equals 2 cm.
Figure2 in Analysis of Behavioural Patterns of the Amazonian Manatee, Trichechus manatus manatus, under Human Care (Mammalia:Sirenia)
Figure2. Distribution of respiratory frequencies (diving phases) for each manatee
Figure1 in Analysis of Behavioural Patterns of the Amazonian Manatee, Trichechus manatus manatus, under Human Care (Mammalia:Sirenia)
Figure1. Map of the manatee tank with current and spatial zones (edited © Nuremberg Zoo 2012)
Developmental changes in bone mechanics from Florida manatees (Trichechus manatus latirostris), obligate swimming mammals
<p>Mammals living in aquatic environments load their axial skeletons differently than their terrestrial counterparts. The structure and mechanical behavior of trabecular bone can be especially indicative of varying habitual forces. Here, we investigate vertebral trabecular bone mechanical properties (yield strength, stiffness, and toughness) throughout development in Florida manatees (<i>Trichechus manatus latirostris</i>), obligate undulatory swimmers. Thoracic, lumbar, and caudal vertebrae were dissected from manatees (N=20) during necropsies. We extracted 6 mm<sup>3</sup> samples from vertebral bodies and tested them in compression in three orientations (rostrocaudal, dorsoventral, and mediolateral) at 2 mm min<sup>-1</sup>. We determined variation in mechanical properties between sexes, and among developmental stages, vertebral regions, and testing orientations. We also investigated the relationships between vertebral process lengths and properties of dorsoventrally and mediolaterally-tested bone. Rostrocaudally-tested bone was the strongest, stiffest, and toughest, suggesting that this is the principle direction of stress. Our results showed that bone from female subadults was stronger and stiffer than their male counterparts; based on these data we hypothesize hormonal shifts at sexual maturity may partially drive these differences . In calves, bone from the posterior region was stronger and tougher than from the anterior region. We hypothesize that since animals grows rapidly throughout early development, bone in the posterior region would be the most ossified to support the rostrocaudal force propagation associated with undulatory swimming .</p>
FIGURES 69–71 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 69–71. Tursiocola sp. SEM. 69. Entire valve showing acute apices and arcuate outline in mantle view. Fig. 70. Detail of external central area in mantle view showing raised central area, stauros and areolae. 71. Detail of external valve apex in side view showing thickened valve margin and distal raphe end curving around apex (arrow). Scale bars: 69 = 1 μm; 70–71 = 1 μm.
FIGURES 20–24. Tursiocola ziemanii. Type population, SEM. 20 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 20–24. Tursiocola ziemanii. Type population, SEM. 20. Entire frustule in girdle view showing cingulum with 2 copulae, each with a double row of pores. 21. Internal view of valve with attached copula. 22. Cingulum comprised of 2 copulae open on one end (arrow) with 2 rows of pores. 23. Isolated copula showing closed end (arrow) and two rows of pores. 24. Internal view of cingulum showing open (arrow) and closed ends of copulae. Scale bars: 20–22, 24 = 10 μm; 23 = 5 μm.
FIGURES 14–19. Tursiocola ziemanii. Type population, SEM. 14–15 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 14–19. Tursiocola ziemanii. Type population, SEM. 14–15. External views of whole valves showing axial and central areas. 16. Internal view of whole valve showing pseudosepta and butterfly structure. 17. Detail of butterfly structure and internal central area with stauros (arrow) and two knobs on the raphe rib. 18. Detail of external central area showing diamond-shaped central area, stauros and deflected proximal raphe ends. 19. Detail of external valve apex showing apparently bifurcated distal raphe ends. Scale bars: 14–16 = 5
FIGURES 65–68. Tursiocola costata. Type population, SEM. 65 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 65–68. Tursiocola costata. Type population, SEM. 65. Internal view of whole valve showing pseudosepta and butterfly structure. 66. Detail of butterfly structure and internal hexagonal central area with two knobs on the raphe rib. 67. Isolated copula showing internal structure and opening at one end (arrow). 68. Isolated copula in girdle view showing opening at one end (short arrow), a single row of pores, and a central tab (long arrow) on the advalvar side. Scale bars: 65, 67–68 = 5 μm; 66 = 1 μm.
FIGURES 42–46. Tursiocola varicopulifera. Type population, SEM. 42 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 42–46. Tursiocola varicopulifera. Type population, SEM. 42. Internal view of whole valve showing pseudosepta and butterfly structure. 43. Detail of butterfly structure and internal oval central area with two knobs on the raphe rib. 44. Entire frustule in girdle view showing differentiated copulae and wide mantle areas. Long arrow indicates valvocopula; short arrow indicates abvalvar copula. 45. Valve and cingulum showing connections between valvocopula and valve margin. 46. Isolated valvocopula showing 3 tabs on advalvar side and 2 rows of elongated pores. Arrow indicates open end of valvocopula. Scale bars: 42, 44, 46 = 10 μm; 43 = 1 μm; 45 = 5 μm.
FIGURES 25–37 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)
FIGURES 25–37. Tursiocola varicopulifera. Type population, LM. 25–29. Frustules in girdle view showing size range and morphological variation. Arrows indicate shadow lines of internal raphe ribs. 30–36. Specimens in valve view showing size range. 37. Isolated abvalvar copula with 1 row of pores. Scale bars: 25–37 = 10 μm. = indicates same specimen at different foci.
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