Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
17
datasets available to search
ShareScore release 0.9.0
Dataset results
17 results for “ectotherm vertebrates”
Data from: Seasonality and growth in tropical freshwater ectotherm vertebrates: results from one-year experimentation in the African grey bichir, giraffe catfish, and the West African mud turtle
<p>Growth in ectotherm vertebrates is strongly rhythmed by seasonal variation in environmental parameters. To track the seasonal variation in ancient times in a continental and tropical context, we aim to develop a method based on the use of the growth rate of fossil ectotherm vertebrates (actinopterygians and chelonians) influenced by seasonal environmental fluctuations they experienced in their lifetime. However, the impact of environmental parameters on growth, positive or negative, and its intensity, depends on the taxa considered and data are scarce for tropical species. For one year, an experiment was conducted to better understand the effect of seasonal variation in environmental parameters (food abundance, temperature, and photoperiod) on the somatic growth rate of three species of tropical freshwater ectotherm vertebrates: the fishes <em>Polypterus senegalus</em> and <em>Auchenoglanis occidentalis</em> and the turtle <em>Pelusios castaneus</em>. Mimicking seasonal shifts expected to be experienced by the animals in the wild, the experiment highlighted the preponderant effect of food abundance on the growth rate of those three species. Water temperature variation had a significant effect on the growth rate of <em>Po. senegalus</em> and <em>Pe. castaneus</em>. Moreover, the photoperiod demonstrated no significant effect on the growth of the three species. The duration of application of starvation or cool water conditions, ranging from 1 to 3 months, did not affect the growth rate of the animals. However, <em>Pe. castaneus</em> showed a temporary sensitivity to the return of ad libitum feeding or of warm water, after a period of starvation or cool water, by a period of compensatory growth. Finally, this experiment revealed, in the three species, fluctuations in the growth rate under controlled and constant conditions. This variation, similar to the variation in precipitation and temperature observed in their native environment, could be linked to a strong effect of an internal rhythm controlling somatic growth rate.</p>
Data from: Seasonality and growth in tropical freshwater ectotherm vertebrates: results from one-year experimentation in the African grey bichir, giraffe catfish, and the West African mud turtle
Open the record for dataset details and reuse information.
Data from: Seasonality determines patterns of growth and age structure over a geographic gradient in an ectothermic vertebrate
<p>Environmental variation connected with sea- sonality is likely to affect the evolution of life-history strategies in ectotherms, but there is no consensus as to how important life-history traits like body size are influ- enced by environmental variation along seasonal gradients. We compared adult body size, skeletal growth, mean age, age at first reproduction and longevity among 11 common frog (<em>Rana temporaria</em>) populations sampled along a 1,600-km-long latitudinal gradient across Scandinavia. Mean age, age at first reproduction and longevity increased linearly with decreasing growth season length. Lifetime activity (i.e. the estimated number of active days during life-time) was highest at mid-latitudes and females had on average more active days throughout their lives than males. Variation in body size was due to differences in lifetime activity among populations—individuals (especially females) were largest where they had the longest cumula- tive activity period—as well as to differences between populations in skeletal growth rate as determined by skel- etochronological analyses. Especially, males grew faster at intermediate latitudes. While life-history trait variation was strongly associated with latitude, the direction and shape of these relationships were sex- and trait-specific. These context-dependent relationships may be the result of life- history trade-offs enforced by differences in future reproductive opportunities and time constraints among the populations. Thus, seasonality appears to be an important environmental factor shaping life-history trait variation in common frogs.</p>
Energy management strategies for ectothermic vertebrates: temperature and heart rate as independent proxies
<p>Filtered data used for analysis of energy management strategies in three different species. R script provides an example of the across- and within-individual analysis. </p>
Cardiovascular contributions and energetic costs of thermoregulation in ectothermic vertebrates
<p>Unfiltered data used in the manuscript with file descriptions. Includes R script and example datasets for reproducing figure 1, as well as animating figure 1 for the box turtle and painted turtle (body temperature - black solid line, ambient temperature - black dotted line, and heart rate - red solid line).</p>
Data from: Seasonality determines patterns of growth and age structure over a geographic gradient in an ectothermic vertebrate
Open the record for dataset details and reuse information.
Data from: Highway to the danger zone: exposure-dependent costs of immunity in a vertebrate ectotherm
Parasite exposure often causes innate immune activation, resulting in tradeoffs among physiological processes and strong selection on the parasite. Costs of immune activation vary widely among and within host populations though, likely dependent on the evolutionary history of host-parasite interactions and the environments in which they occur. For hosts, degree of exposure may drive the magnitude of costs incurred, and subsequently whether hosts resist or tolerate infections. If costs increase concomitantly with exposure, a threshold may exist where the expense of parasite resistance becomes prohibitive and parasite tolerance becomes favorable. Here, we characterized exposure-dependent costs of an innate immune response in brown anoles (Anolis sagrei) by tracking allocation of an isotopically-labelled essential amino acid (13C-leucine), to the liver and gonads. To elicit immune responses, we used lipopolysaccharide (LPS), a strongly immunogenic molecule from Salmonella spp. We found that both sexes paid dose-dependent costs of Salmonella LPS-induced immune activation, but costs were experienced differently by the sexes, likely due to differences in life history. Males allocated more leucine to their livers in response to higher LPS doses. In females, a tendency for increased costs in response to dose were only revealed when leucine allocation ratios between lymphoid and reproductive organs were considered. We also found that regardless of dose, males always allocated more leucine to their gonads than females. Lastly, and perhaps most interestingly, cost functions in both sexes were linear, but with shallow slopes, indicating modest costs of immune activation in response to Salmonella LPS in this species. Altogether, our results demonstrate that costs of immunity are dose-dependent in this introduced lizard species, but sexes experience costs differently. Characterization of relationships between host exposure and cost of immune activation such as these can facilitate predictions about how parasites might circulate through communities.
Data from: Highway to the danger zone: exposure-dependent costs of immunity in a vertebrate ectotherm
Open the record for dataset details and reuse information.
Data from: Immunocompetence in a long-lived ectothermic vertebrate is temperature dependent but shows no decline in older adults
1. Temperature affects nearly all aspects of the physiology of ectotherms, including their ability to mount an immune response. Typically, the ectothermic vertebrate immune system can respond over a wide range of temperatures, but there is a species-specific temperature at which responses are strongest, with impaired responses above and below this threshold. In long-lived ectotherms, aging could also influence the ability to respond to temperature changes as immunosenecence, the functional decrease in immune function with age, is widely reported. 2. This study examined the effects of the interaction between temperature and age on B cell function in a long-lived reptile, the red-eared slider turtle, Trachemys scripta. B cells in this species have previously been shown to have two main functions, phagocytosis and antibody production. 3. Adult turtles were trapped and blood samples taken. Because sliders grow throughout their lifetime, plastron length was used as a proxy for age. Leukocytes were isolated and used in either an ELISpot assay to examine their ability to produce antibodies spontaneously or when stimulated, or used in a phagocytic assay. The ELISpot and phagocytic assays were conducted over a range of biologically relevant temperatures. 4. We found no interaction between age and temperature on any measure of B cell function. In all cases there was a significant effect of temperature, with impaired function at temperatures below 29°C, but no impairment of function at higher temperatures. We also found little evidence of immunosenesce in any response. 5. This study provides insight into the thermal biology of B cell function in sliders and provides an interesting connection between immunology, behavior, and ecology in this long-lived turtle.
Data from: Immunocompetence in a long-lived ectothermic vertebrate is temperature dependent but shows no decline in older adults
Open the record for dataset details and reuse information.
Data from: Thermal sensitivity of immune function: evidence against a generalist-specialist tradeoff among endothermic and ectothermic vertebrates
Open the record for dataset details and reuse information.
Data from: Effects of early nutritional stress on physiology, life-histories and their trade-offs in a model ectothermic vertebrate
Open the record for dataset details and reuse information.
Environmental stress in an ectothermic vertebrate, the coral reef fish Pomacentrus moluccensis
GEO Series GSE7499. Pomacentrus moluccensis; Danio rerio. 59 samples. Type: Expression profiling by array.
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: Why do endothermic vertebrates have bigger brains than ectothermic ones?
Open the record for dataset details and reuse information.
Oxytocin Signaling Regulates the Homeostatic Response to Cold Stress in Ectothermic Vertebrate
GEO Series GSE159019. Oreochromis niloticus. 8 samples. Type: Expression profiling by high throughput sequencing.
Differential transcription of fathead minnow immune-related genes following infection with an emerging pathogen of ectothermic vertebrates, Frog virus 3
GEO Series GSE53739. Pimephales promelas. 16 samples. Type: Expression profiling by array.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.