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59 results for “Manatee”
Figure 2 in Manatee behavioral response to boats
Figure 2. Manatees were captured and tagged in Lemon Bay during the first field season (2007) and in Placida Harbor and Gasparilla Sound during the second field season (2008). When the DTAGs were recording and the manatees were being followed by the observation boat, the manatees ranged from Sarasota Bay to Cayo Costa, between the Gulf of Mexico and the Peace River.
Figure 15 in Manatee behavioral response to boats
Figure 15. The amount of time a manatee has to change its behavior before the time of CPA in relation to boat speed class for boat passes within 50 m of the manatee based on the raw data (n 5 91). Boat passes are split between those that are single or the first in a string of overlapping passes (A) and those subsequent to the first pass in a string of overlapping passes (B). The boxes represent the interquartile range, the horizontal line shows the median, and the whiskers indicate the 10th and 90th percentiles.
Figure 5 in Manatee behavioral response to boats
Figure 5. Model-estimated mean probability (6 SEM) of any change in manatee behavior (roll, heading, depth, or fluking) during a boat pass in relation to manatee-boat distance at CPA. Means sharing any common letters are not significantly different (P> 0.05). The fixed factor values used to generate these estimates are listed in Table 3.
Figure 9 in Manatee behavioral response to boats
Figure 9. Model-estimated mean probability (6 SEM) of a manatee changing its heading (A) and mean number of heading changes per min (6 SEM) (C) according to presence of manatee chewing at the start of the boat pass. Model-estimated mean probability (6 SEM) of manatee making a change in depth (B) and mean number of depth changes per min (6 SEM) (D) according to seagrass presence at the manatee's location at the start of the boat pass. Means sharing any common letters are not significantly different (P> 0.05). The fixed factor values used to generate these estimates are listed in Table 3.
Figure 6 in Manatee behavioral response to boats
Figure 6. Model-estimated mean probability of a manatee making a change in roll (A), heading (B), depth (C), and fluking (D) (6 SEM) during a boat pass in relation to manatee-boat distance at CPA. Means sharing any common letters are not significantly different (P> 0.05). The fixed factor values used to generate these estimates are listed in Table 3.
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)
Supporting Datasets for 'The longest documented distance traveled by a West Indian manatee'
<p>This dataset contains multiple sources of geospatial and environmental data used for the analysis of Tico's journey. This is a West-Indian manatee that was rescued, rehabilitated and tracked after release. Tico traveled approximately 4,017 km over 62 days through deep oceanic waters. Correlating Tico's trajectory and velocity with surface currents revealed the influence of the North Brazil Current (NBC) and its vortices on his trajectory. The data integrates satellite remote sensing, ocean reanalysis, .</p> <p>The dataset include:</p> <ol> <li> <p><strong>Geographic locations of Tico (Delemetry Data)</strong></p> </li> <li> <p><strong>General Bathymetric Chart of the Oceans (GEBCO)<br></strong></p> </li> <li> <p><strong>NEMO - Global Ocean Physics Analysis and Forecast data: </strong>Surface current data from the NEMO model provided by CMEMS (GLORYS reanalysis).<strong><br></strong></p> </li> <li> <p><strong>HYCOM Global Ocean Forecasting System (GOFS) 3.1 Analysis:<br></strong></p> </li> <li> <p><strong>OSCAR - Ocean Surface Current Analyses Real-time<br></strong></p> </li> <li> <p><strong>Soil Moisture Active Passive (SMAP)<br></strong></p> </li> <li> <p><strong>Integrated Multi-satellite Retrievals for Global Precipitation Measurements (IMERG)</strong></p> </li> </ol> <p><strong>Disclaimer:</strong></p> <p>This dataset is a compilation of various data sources, each of which may be subject to its own specific licensing terms and conditions. Users of this dataset are strongly advised to review the license associated with each individual sub-dataset before using, modifying, or redistributing the data. While we have provided the dataset under a Creative Commons Attribution 4.0 International (CC BY 4.0) license, certain sub-datasets may have additional restrictions or requirements, such as attribution, non-commercial use, or limitations on derivative works. It is the responsibility of the user to ensure compliance with all applicable licenses. Please refer to the original data sources and their respective licenses for detailed information.</p>
Antillean manatees feed on floating Halophila baillonii in Placencia Lagoon, Belize
<p>Supplementary Videos for upcoming article in the Latin American Journal of Aquatic Mammals titled: "Antillean manatees feed on floating <i>Halophila baillonii</i> in Placencia Lagoon, Belize"</p>
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.
Amazonian manatee critical habitat revealed by artificial intelligence-based passive acoustic techniques
<p>These files are part of the publication under the same name. The pkl file contains manatee vocalizations mixed with background sounds that have been used to train a CNN. The resulting model is available in the .tflite file. The Python file can browse the vocalizations that have been made available, visualize the human labels, and if Tensorflow is available classify the samples, providing the classifier output for the manatee class. The corresponding paper should be referred to for thresholds and performance details that were used for field data.</p>
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.
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International Brain Laboratory public data
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OpenNeuro
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