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4 results for “Florida manatee”
Bioacoustic Dataset of African and Florida Manatee Vocalizations for Machine Learning Applications, 2020-2022
This data package presents a comprehensive acoustic library of manatee vocalizations for machine learning (ML) and classifier development. It includes recordings from two species, African and Florida manatees, sampled across four locations. The species are combined due to the acoustic similarity of their vocalizations, providing a diverse and representative training set for ML algorithms. The dataset consists of 0.5-second WAV clips categorized as either containing manatee vocalizations (MV, n=18,129 clips) or not (Noise, n=23,444 clips). MV clips may include multiple vocalizations or truncated calls. All clips were manually verified by two researchers with expertise in manatee acoustics. Recordings were collected using stationary hydrophones deployed in natural habitats, with variable signal-to-noise ratios (SNR) resulting from changes in distance between the vocalizing manatees and the recorders. Background noise across sites is relatively low, with minimal anthropogenic noise; caution is advised when applying models to noisier environments. No dolphin species are believed to be present at the recording sites, and models trained on this dataset should be used cautiously in dolphin-inhabited regions to avoid false positives. If you use this dataset, please reach out to the listed contacts, we are interested in learning how it supports your work.
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>
Developmental changes in bone mechanics from Florida manatees (Trichechus manatus latirostris), obligate swimming mammals
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Investigating the Gene Expression Profiles of Florida Manatees (Trichechus manatus latirostris) Rehabilitated Following a Red Tide
GEO Series GSE86792. Trichechus manatus latirostris. 11 samples. Type: Expression profiling by high throughput sequencing.
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