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36 results for “endotherm”
Compression Therapy Following Truncal Vein Endothermal Ablation And Distal Sclerotherapy
ClinicalTrials.gov study NCT02890563. IPD Sharing: Not stated. Countries: 1. Publications: 1.
CAERvest® - A Novel Endothermic Hypothermic Device for Core Body Cooling. Safety and Efficacy Testing.
ClinicalTrials.gov study NCT02030236. IPD Sharing: Not stated. Countries: 1. Publications: 2.
New Compression Hosiery Versus Standard Class II Compression Stockings After Endothermal Ablation
ClinicalTrials.gov study NCT03477227. IPD Sharing: YES. Countries: 1. Publications: 1.
Data from: Endothermic mosasaurs? Possible thermoregulation of Late Cretaceous mosasaurs (Reptilia, Squamata) indicated by stable oxygen isotopes in fossil bioapatite in comparison with coeval marine fish and pelagic seabirds
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Data for: An alternative hypothesis for the evolution of sexual segregation in endotherms
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Data from: Behavior and nutritional condition buffer a large-bodied endotherm against direct and indirect effects of climate
Temporal changes in net energy balance of animals strongly influence fitness; consequently, natural selection should favor behaviors that increase net energy balance by buffering individuals against negative effects of environmental variation. The relative importance of behavioral responses to climate-induced variation in costs versus supplies of energy, however, is uncertain, as is the degree to which such responses are mediated by current stores of energy. We evaluated relationships among behavior, nutritional condition (i.e., energetic state), and spatiotemporal variation in costs versus supplies of energy available to a large-bodied endotherm, the North American elk (Cervus elaphus), occupying two ecosystems with contrasting climates; 1) a temperate, montane forest; and 2) an arid, high-elevation desert. We hypothesized that during spring through autumn, behavioral responses to the energetic landscape would be both context-dependent (i.e., would vary as a function of the environmental conditions experienced by elk in the forest versus the desert), and state-dependent (i.e., would vary as a function of the energetic state of an individual). We tested several predictions derived from that hypothesis by combining output from a biophysical model of the thermal environment with data on forage quality, animal locations, and nutritional condition of individuals. At the population level, elk in the desert selected areas that reduced costs of thermoregulation over those that provided the highest quality forage. In the forest, however, costs imposed by the thermal environment were less pronounced, and elk selected areas that increased access to high quality forage over those that reduced costs of thermoregulation. At the individual level, nutritional condition did not influence strength of selection for low-cost areas or high quality forage among elk in the forest. In the desert, however, strength of selection for low-cost areas (but not forage quality) was state-dependent - individuals in the poorest condition at the end of winter showed the strongest selection for areas that reduced costs of thermoregulation during spring and summer, and also expended the least amount of energy on locomotion. Our results highlight the importance of understanding the roles of behavior and nutritional condition in buffering endotherms against direct and indirect effects of climate on fitness.
Compression Therapy Following Endothermal Ablation
ClinicalTrials.gov study NCT02522845. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Varithena Versus Endothermal Ablation of the Great Saphenous Vein (VERITAS)
ClinicalTrials.gov study NCT05312970. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Thermal sensitivity of immune function: evidence against a generalist-specialist tradeoff among endothermic and ectothermic vertebrates
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Data from: Shared extremes by ectotherms and endotherms: body elongation in mustelids is associated with small size and reduced limbs
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Data from: Behavior and nutritional condition buffer a large-bodied endotherm against direct and indirect effects of climate
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Data from: Bergmann's body size rule operates in facultatively endothermic insects: evidence from a complex of cryptic bumblebee species
According to Bergmann's rule we expect species with larger body size to inhabit locations with a cooler climate, where they may be well adapted to conserve heat and resist starvation. This rule is generally applied to endotherms. In contrast, body size in ectothermic invertebrates has been suggested to follow the reverse ecogeographic trend: these converse Bergmann's patterns may be driven by the ecological constraints of shorter season length and lower food availability in cooler high latitude locations. Such patterns are particularly common in large insects due to their longer development times. As large and facultatively endothermic insects, bumblebees could thus be expected to follow either trend. In this investigation, we studied body size of three bumblebee species over a large spatial area and investigated whether interspecific trends in body size correspond to differences in their distribution consistent with either Bergmann's or a converse Bergmann's rule. We examined the body size of queens, males and workers of the Bombus lucorum complex of cryptic bumblebee species from across the whole of Great Britain. We found interspecific differences in body size corresponding to Bergmann's rule: queens and males of the more northerly distributed, cool-adapted, species were largest. In contrast, the mean body size of the worker caste did not vary between the three species. These differences in body size may have evolved under selection pressures for thermoregulation or starvation resistance. We suggest that this case study in facultatively endothermic insects may help clarify the selection pressures governing Bergmann rule trends more generally.
Data from: Why do endothermic vertebrates have bigger brains than ectothermic ones?
<p class="MsoNormal"><span>Endothermic vertebrates (birds and mammals) show much larger relative brain sizes than ectothermic ones. The gap is widely attributed to the evolution of endothermy itself, which makes sustained high body temperatures possible. However, other variables that emerged or proliferated after endothermy arose, in particular greater and more extended </span><span>parental </span><span>provisioning</span><span>, no doubt also contribute to this gap. </span><span>Here, we conducted a targeted comparison of lizards and precocial birds to estimate the relative contribution of these factors. B</span><span>oth taxa share large amniotic eggs, lack post-hatching provisioning, and have overlapping body temperatures. After statistically removing additional confounding variables, we found that the statistical effect of endothermy amounts to a near-tripling of brain size, and thus accounts for about half of the difference in brain size between lizards and birds in general. A separate analysis revealed that the effect of extended parental provisioning in birds is associated with a near-doubling of brain size. These results suggest that various processes that were enabled or facilitated by endothermy, in particular parental provisioning after </span><span>hatching or birth</span><span>, played an equally important role in the evolution of increased brain size among endotherms.</span></p>
Data from: Bergmann's body size rule operates in facultatively endothermic insects: evidence from a complex of cryptic bumblebee species
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Data from: Why do endothermic vertebrates have bigger brains than ectothermic ones?
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FIGURE 3. A in Oology And The Evolution Of Thermophysiology In Saurischian Dinosaurs: Homeotherm And Endotherm Deinonychosaurians?
FIGURE 3. A. SEM of an oviraptorid egg (IGM 100/979). Note the bi-layered eggshell structure, with layer 1 consisting of acicular calcitic crystals and where the contact between layers 1 and 2 is aprismatic (dotted line). B and C. SEMs of troodontids T. formosus and B. jaffei. Note the similarity of the microstructure of the eggshells among these two troodontids and the Chinese egg, clutch LX09XLOZLX0001-2156. Also note the significant difference of crystallization in layer 1 between oviraptorids and troodontids as well as the type of contact between structural layers 1 and 2. The dotted lines denote the border between layers 1 and 2 and arrows the voids in all figures. Arrows in layer two points to voids that are more numerous in this second structural layer than in layer 1. These voids are the mold of protein matter that normally composed 2% of eggshell and were destroyed during the process of fossilization.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.