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.
388
datasets available to search
ShareScore release 0.9.0
Dataset results
388 results for “Squirrels”
Fig 3 in Western striped squirrel Tamiops mcclellandii: A non-avian sentinel species of bird waves
Fig 3. Close-association between Dicrurus annectens and Tamiops mcclellandii.
Fig. 1 in Western striped squirrel Tamiops mcclellandii: A non-avian sentinel species of bird waves
Fig. 1. Transects and habitat types at the study site.
Fig. 2 in Western striped squirrel Tamiops mcclellandii: A non-avian sentinel species of bird waves
Fig. 2. Close-association between Dicrurus paradiseus and Tamiops mcclellandii.
Data and MATLAB files for: Timescale analyses of fluctuations in coexisting populations of a native and invasive tree squirrel
<p>1. Competition from invasive species is an increasing threat to biodiversity. In Southern California, the western gray squirrel (Sciurus griseus, WGS) is facing increasing competition from the fox squirrel (Sciurus niger, FS), an invasive congener.</p> <p>2. We used spectral methods to analyze 140 consecutive monthly censuses of WGS and FS within a 11.3 ha section of the California Botanic Garden. Variation in the numbers for both species and their synchrony was distributed across long timescales (> 15 months).</p> <p>3. After filtering out annual changes, concurrent mean monthly temperatures from nearby Ontario Airport (ONT) yielded a spectrum with a large semiannual peak and significant spectral power at long timescales (> 30 months). Squirrel-temperature cospectra showed significant negative covariation at long timescales (> 35 months) for WGS and smaller significant negative peaks at 6 months for both species.</p> <p>4. Simulations from a Lotka-Volterra model of two competing species indicates that the risk of extinction for the weaker competitor increases quickly as environmental noise shifts from short to long timescales.</p> <p>5. We analyzed the timescales of fluctuations in detrended mean annual temperatures for the time period 1915-2014 from 1218 locations across the continental USA. In the last two decades, significant shifts from short timescales to long timescales have occurred, changing from less than 3 years to 4-6 years.</p> <p>6. Our results indicate that (i) population fluctuations in co-occurring native and invasive tree squirrels are synchronous, occur over long timescales, and may be driven by fluctuations in environmental conditions; (ii) long timescale population fluctuations increase the risk of extinction in competing species, especially for the inferior competitor; and (iii) the timescales of interannual environmental fluctuations may be increasing from recent historical values. These results have broad implications for the impact of climate change on the maintenance of biodiversity.</p>
FIG. 2 in Beavers and flying squirrels (Rodentia: Castoridae, Pteromyini) from the Late Pliocene of Hambach 11C, Germany
FIG. 2. — Stratigraphic column of the section.
Camera trap grey squirrel photograph data
<p>Effective wildlife population management requires an understanding of the abundance of the target species. <span>In the UK, the increase in numbers and range of the non-native invasive grey squirrel </span><em>Sciurus</em> <em>carolinensis</em><span> poses a substantial threat to the existence of the native red squirrel <em>S. vulgaris</em>, to tree health, and to the forestry industry. Reducing the number of grey squirrels is crucial to mitigate their impacts.</span><span> </span></p> <p>Camera traps are increasingly used to estimate animal abundance, and methods have been developed that do not require the identification of individual animals. Most of these methods have been focussed on medium to large mammal species with large range sizes and may be unsuitable for measuring local abundances of smaller mammals that have variable detection rates and hard-to-measure movement behaviour.</p> <p>The aim of this study was to develop a practical and cost-effective method, based on a camera trap index, that could be used by practitioners to estimate target densities of grey squirrels in woodlands to provide guidance on the numbers of traps or contraceptive feeders required for local grey squirrel control.</p> <p><span>Camera traps were deployed in ten independent woods of between 6 and 28 ha in size. An index, calculated from the number of grey squirrel photographs recorded per camera per day had a strong linear relationship (<em>R<sup>2</sup></em> = 0.90) with the densities of squirrels removed in trap and dispatch operations. From different time filters tested, a 5 minute filter was applied, where photographs of squirrels recorded on the same camera within 5 minutes of a previous photograph were not counted. There were no significant differences between the number of squirrel photographs per camera recorded by three different models of camera, increasing the method's practical application.</span></p> <p><span>This study demonstrated that a camera index could be used to inform the number of feeders or traps required for grey squirrel </span><span>management through culling or contraception. Results could be obtained within six days without requiring expensive equipment or a high level of technical input. This method can easily be adapted to other rodent or small mammal species, making it widely applicable to other wildlife management interventions.</span></p>
Senescence and the stress axis in male ground squirrels
<p>A critical time in the life of a male occurs at reproduction when his behavior, physiology, and resources must be brought to bear for the central purpose of his life. We ask whether reproduction results in dysfunction of the stress axis, is linked to life history, and causes senescence. We assessed if deterioration in the axis underlies variation in reproductive lifespan in males of 5 species of North American ground squirrels whose life history varies from near semelparity to iteroparity. The most stressful and energy-demanding time occurs in spring during the intense 2–3 week breeding competition just after arousal from hibernation. We compared their stress axis functioning before and after the mating period using a hormonal challenge protocol. We found no evidence of stress axis dysfunction nor was there a relationship between reproductive lifespan and stress axis functional deterioration. Moreover, there was no consistent relationship between free cortisol levels and downstream measures. Thus, stress axis function was not traded off to promote reproduction and conclude that it is a pre-requisite for life. Hence, it functions as a constraint and does not undergo senescence.</p>
Squirrel-Cage Induction Motor Fault Diagnosis Dataset
<p>The <strong>Squirrel Cage Induction Motor Fault Diagnosis Dataset</strong> is a multi-sensor data collection gathered to expand research on anomaly detection, fault diagnosis, and predictive maintenance, mainly using non-invasive methods such as thermal observation or vibration measurement. The measurements were gathered using an advanced <em>Wrocław University of Science and Technology</em> laboratory designed to simulate and study motor defects. The collected dataset is licensed under a <em>Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International</em> License.</p> <p>Available data:</p> <ul> <li>thermal images</li> </ul> <p>The example dataset utilization is presented in the GitHub repository: <a href="https://github.com/MatPiech/motor-fault-diagnosis/tree/main">motor-fault-diagnosis</a></p> <p>Related publications:</p> <ul> <li><a href="https://ein.org.pl/Unraveling-Induction-Motor-State-through-Thermal-Imaging-and-Edge-Processing-A-Step,170114,0,2.html">Unraveling Induction Motor State through Thermal Imaging and Edge Processing: A Step towards Explainable Fault Diagnosis</a></li> </ul>
Data from: Rural selection drives the evolution of an urban-rural cline in coat color in gray squirrels
<div> <p><span>Phenotypic differences between urban and rural populations are well-documented, but the evolutionary processes driving trait variation along urbanization gradients are often unclear. We combined spatial data on abundance, trait variation, and measurements of fitness to understand cline structure and test for natural selection on heritable coat color morphs (melanic, gray) of eastern gray squirrels (Sciurus carolinensis) along an urbanization gradient. Population surveys using remote cameras and visual counts at 76 sites along the urbanization gradient revealed a significant cline in melanism, decreasing from 48% in the city center to <5% in rural woodlands. Among 76 squirrels translocated to test for phenotypic selection, survival was lower for the melanic than gray morph in rural woodlands, whereas there was no difference in survival between color morphs in the city. These results suggest the urban-rural cline in melanism is explained by natural selection favoring the gray morph in rural woodlands combined with relaxed selection in the city. Our study illustrates how trait variation between urban and rural populations can emerge from selection primarily in rural populations rather than adaptation to novel features of the urban environment. </span>This reposotory contains a) occupancy data, point count data, and R code used to estimate the urban-rural cline in melanism, and b) radiotelemetry data and R code used to estimate differential survival between color morphs in urban and rural environments.</p> </div>
Senescence and the stress axis in male ground squirrels
Open the record for dataset details and reuse information.
Data from: A prelude to conservation genomics: First chromosome-level genome assembly of a flying squirrel (Pteromyini: Pteromys volans)
Open the record for dataset details and reuse information.
Population structure of the endangered Siberian flying squirrel (Pteromys volans) revealed by genomic and mitochondrial data
Open the record for dataset details and reuse information.
Data from: A Miopetaurista (Sciuridae, Rodentia) cranium from the middle Miocene of Bavaria (Germany) and brain evolution in flying squirrels
Open the record for dataset details and reuse information.
Data: Sex-specific effects of capital resources on reproductive timing and success in red squirrels
Open the record for dataset details and reuse information.
Data from: Pest or pest control? Coyote interactions with cattle and Richardson’s ground squirrels
Open the record for dataset details and reuse information.
Data from: An assessment of whether age, sex, and reproductive status affect bait uptake by grey squirrels
Open the record for dataset details and reuse information.
Camera trap grey squirrel photograph data
Open the record for dataset details and reuse information.
Data from: The effects of stress and glucocorticoids on vocalizations: a test in North American red squirrels
Open the record for dataset details and reuse information.
Data from: Rural selection drives the evolution of an urban-rural cline in coat color in gray squirrels
Open the record for dataset details and reuse information.
Data from: Inferring the locomotor ecology of two of the oldest fossil squirrels: Influence of operationalisation, trait, body size, and machine learning method
Open the record for dataset details and reuse information.
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.