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.
2,441
datasets available to search
ShareScore release 0.9.0
Dataset results
2,441 results for “extinct”
Fig. 3 in Genetic diversity and population structure of Brycon nattereri (Characiformes: Bryconidae): a Neotropical fish under threat of extinction
Fig. 3. Haplotype network based on partial sequencing of the D-loop region (mtDNA) of 92 individuals of Brycon nattereri from the Laranjinha River. Circle sizes are pro- portional to haplotype frequency.
Alya Eulerian LES results fire extinction nozzle low mass flow rate (paraview files)
<p>The present data complements the Deliverable 5.2. Toolchain V2 to couple CFD and multiple droplet and continuous droplet models.It includes a paraview file (*pvd) for the continuous droplet model (Eulerian-Eulerian) with an inlet mass flow rate of 0.05 kg/s. </p> <p>The unstructured mesh employed to simulate the injector system is composed by 81.6 million tetrahedrons that include the internal ow in the nozzle and the discharged atmosphere. Three levels of refinement are considered to characterize the internal ow and the near eld after the expansion, the jet penetration up to 15D (being D=2mm, the diameter of the nozzle) and the surrounding air with mesh resolution of 0.1, 0.3 and 1.5 mm respectively. A conservative level set is used in combination a a second order low dissipation finite element scheme and the LES model Vreman. </p> <p>Considered variables are: </p> <p> <PDataArray type="Float64" Name="AVD32_average"/> : average particle size distribution</p> <p> <PDataArray type="Float64" Name="AVDEN_average"/> : average density</p> <p> <PDataArray type="Float64" Name="AVL _average"/> : average liquid fraction</p> <p> <PDataArray type="Float64" Name="AVL2 _average"/>: average square liquid fraction </p> <p> <PDataArray type="Float64" Name="AVS _average"/>: average surface density</p> <p> <PDataArray type="Float64" Name="AVS0 _average"/>: average surface density 0</p> <p> <PDataArray type="Float64" Name="CON01_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="CON02_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="CON03_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="CON04_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="D32 _average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="DENSI_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="PRESS_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="SIGM0_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="SIGMA_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="TURBU_average"/>: not relevant (instantaneous values)</p> <p> <PDataArray type="Float64" Name="VELOC_average" NumberOfComponents="3"/>: average velocity</p> <p> <PDataArray type="Float64" Name="VISCO_average"/>: not relevant (instantaneous values)</p>
Chromosomal-level genome assembly of the scimitar‐horned oryx: insights into diversity and demography of a species extinct in the wild
<p>Captive populations provide a valuable insurance against extinctions in the wild. However, they are also vulnerable to the negative impacts of inbreeding, selection and drift. Genetic information is therefore considered a critical aspect of conservation management. Recent developments in sequencing technologies have the potential to improve the outcomes of management programmes; however, the transfer of these approaches to applied conservation has been slow. The scimitar‐horned oryx (<i>Oryx dammah)</i> is a North African antelope that has been extinct in the wild since the early 1980s and is the focus of a large‐scale and long‐term reintroduction project. To enable the selection of suitable founder individuals, facilitate post‐release monitoring and improve captive breeding management, comprehensive genomic resources are required. Here, we used 10X Chromium sequencing together with Hi‐C contact mapping to develop a chromosomal‐level genome assembly for the species. The resulting assembly contained 29 chromosomes with a scaffold N50 of 100.4 Mb, and displayed strong chromosomal synteny with the cattle genome. Using resequencing data from six additional individuals, we demonstrated relatively high genetic diversity in the scimitar‐horned oryx compared to other mammals, despite it having experienced a strong founding event in captivity. Additionally, the level of diversity across populations varied according to management strategy. Finally, we uncovered a dynamic demographic history that coincided with periods of climate variation during the Pleistocene. Overall, our study provides a clear example of how genomic data can uncover valuable insights into captive populations and contributes important resources to guide future management decisions of an endangered species.</p>
Figure 1 in Bombus rubriventris: type locality, different histories of bumblebees in the New World, and a likely invertebrate extinction
Figure 1. Dorsal aspect of the holotype female of Bombus rubriventris showing the 'St. Domingue.' label (photo: NHM photo unit). Scale divisions in mm.
Data from: Early Silurian recovery of Baltica crinoids following the end-Ordovician extinctions (Llandovery, Estonia)
Three new Llandovery (early Silurian) crinoids from Estonia provide an improved understanding of the paleogeographic aspects of the crinoid diversification following the end-Ordovician extinctions. The new taxa include Euspirocrinus hintsae n. sp. (Rhuddanian eucladid), Oepikicrinus perensae n. sp. n. gen. (Aeronian camerate), and Rozhnovicrinus isakarae n. sp. n. gen. (Aeronian eucladid). This brings the total of described Llandovery crinoids in Estonia to eight nominal species and a further three taxa in open nomenclature. The Rhuddanian radiation in Baltica mirrored that on Laurentia and Avalonia and was dominated by Ordovician clades that continued to diversify during the Silurian. Known Aeronian crinoids from Estonia continue these clades, whereas new clades diversified on Laurentia and Avalonia. However, by the Wenlock a largely cosmopolitan fauna existed on Laurentia, Avalonia, and Baltica.
Data from: An extinction event in planktonic Foraminifera preceded by stabilizing selection
Unless they adapt, populations facing persistent stress are threatened by extinction. Theoretically, populations facing stress can react by either disruption (increasing trait variation and potentially generating new traits) or stabilization (decreasing trait variation). In the short term, stabilization is more economical, because it quickly transfers a large part of the population closer to a new ecological optimum. However, canalization is deleterious in the face of persistently increasing stress, because it reduces variability and thus decreases the ability to react to further changes. Understanding how natural populations react to intensifying stress reaching terminal levels is key to assessing their resilience to environmental change such as that caused by global warming. Because extinctions are hard to predict, observational data on the adaptation of populations facing extinction are rare. Here, we make use of the glacial salinity rise in the Red Sea as a natural experiment allowing us to analyse the reaction of planktonic Foraminifera to stress escalation in the geological past. We analyse morphological trait state and variation in two species across a salinity rise leading to their local extinction. One species reacted by stabilization in shape and size, detectable several thousand years prior to extinction. The second species reacted by trait divergence, but each of the two divergent populations remained stable or reacted by further stabilization. These observations indicate that the default reaction of the studied Foraminifera is canalization, and that stress escalation did not lead to the emergence of adapted forms. An inherent inability to breach the global adaptive threshold would explain why communities of Foraminifera and other marine protists reacted to Quaternary climate change by tracking their zonally shifting environments. It also means that populations of marine plankton species adapted to response by migration will be at risk of extinction when exposed to stress outside of the adaptive range.
FIGURE 6 in A new and presumably extinct species of Ptychochromoides (Teleostei: Perciformes: Cichlidae) from central Madagascar
FIGURE 6. Ptychochromoides vondrozo, holotype, UMMZ 235297, adult female, 182.0 mm SL; Madagascar: Fianarantsoa Province: Ramanara River. Right side illustrated due to distortion of specimen (image reversed). Photograph by Heok Hee Ng.
FIGURE 4 in A new and presumably extinct species of Ptychochromoides (Teleostei: Perciformes: Cichlidae) from central Madagascar
FIGURE 4. Ptychochromoides betsileanus, lectotype, BMNH 1882.2.25: 69, adult male, 159.6 mm SL; Madagascar: Betsileo region. Right side illustrated due to damage to left side (image reversed).
FIGURE 1 in The last scream: the distress call of a probably extinct Brazilian anuran (Holoaden bradei Lutz, 1958)
FIGURE 1. Spectrogram (above) and oscillogram (below) of two distress calls of Holoaden bradei. One call with ascendantdescendant modulation (A) and another with slight modulation along its duration, except for the final portion, where it is observable a strong descendant modulation (B).
Data used in the article "Cryptic disease-induced mortality may cause host extinction in an apparently-stable host-parasite system"
<p>These data files include all the capture-history matrices that were used in the article, including two matrices with the age of captured individuals (adults or juveniles) according to the definition presented in the main text. Infection intensity (zoospore equivalents per swab) is provided in separate files for all <em>Rhinoderma darwini</em>i and<em> Eupsophus contulmoensis</em> individuals that tested positive for <em>Batrachochytrium dendrobatidis</em> infection. Also, the R code used for the fully paramaterized matrix population model 1 (including figures) is provided. Other codes used to analyze our data, especifically capture-recapture models, were obtained from Kéry and Schaub 2012 (<em>Bayesian population analysis using WinBUGS. A hierarchical perspective</em>. Waltham, USA: Academic Press.)</p>
Data from: How density dependence, genetic erosion, and the extinction vortex impact evolutionary rescue
<p>Following severe environmental change that reduces mean population fitness below replacement, populations must adapt to avoid eventual extinction, a process called evolutionary rescue. Models of evolutionary rescue demonstrate that initial size, genetic variation, and degree of maladaptation influence population fates. However, many models feature populations that grow without negative density dependence or with constant genetic diversity despite precipitous population decline, assumptions likely to be violated in conservation settings. We examined the simultaneous influences of density-dependent growth and erosion of genetic diversity on populations adapting to novel environmental change using stochastic, individual-based simulations. Density dependence decreased the probability of rescue and increased the probability of extinction, especially in large and initially well-adapted populations that previously have been predicted to be at low risk. Increased extinction occurred shortly following environmental change, as populations under density dependence experienced more rapid decline and reached smaller sizes. Populations that experienced evolutionary rescue lost genetic diversity through drift and adaptation, particularly under density dependence. Populations that declined to extinction entered an extinction vortex, where small size increased drift, loss of genetic diversity, and the fixation of maladaptive alleles, hindered adaptation, and kept populations at small densities where they were vulnerable to extinction via demographic stochasticity.</p>
Fig. 119 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 119. Dorsomedial (cerebellar) views of left petrosal of Tapirus terrestris (AMNH-VP 14103/1587). Scale 5 1 cm.
Fig. 118 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 118. Ventrolateral (tympanic) views of left petrosal of Tapirus terrestris (AMNH-VP 14103/1587)
Fig. 113 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 113. Ventrolateral (tympanic) views of the left petrosals of Equus caballus (SB MP 55) (Perissodactyla, Hippomorpha) and Tapirus terrestris (AMNH-VP 14103/1587) (Perissodactyla, Ceratomorpha) indicating petrosal contacts (outline) with different parts of the bony tympanic bulla and meatal tube. Striped areas indicate where the bony bulla has fused to the petrosal.
Fig. 115 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 115. Dorsolateral views of left petrosals of Equus caballus (SB MP 55) (Perissodactyla, Hippomorpha) and Tapirus terrestris (AMNH-VP 14103/1587) (Perissodactyla, Ceratomorpha). Dorsomedial and ventrolateral surfaces are gray.
Fig. 112 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 112. Ventrolateral (tympanic) views of left petrosal of Equus caballus (SB MP 55) (Perissodactyla, Hippomorpha). Striped areas are fused bulla. Scale 5 1 cm.
Fig. 108 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 108. Ventromedial views of left petrosals of †Dissacus praenuntius (UM 75501) (†Mesonychia, †Mesonychidae) and †Mesonyx obtusidens (AMNH-VP 12643) (†Mesonychia, †Mesonychidae). Dorsomedial and ventrolateral surfaces are gray.
Fig. 107 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 107. Dorsolateral views of left petrosals of †Dissacus praenuntius (UM 75501) (†Mesonychia, †Mesonychidae) and †Mesonyx obtusidens (AMNH-VP 12643 (†Mesonychia, †Mesonychidae). Dorsomedial and ventrolateral surfaces are gray.
Fig. 101 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 101. Ventromedial views of left petrosals of †Basilosaurus isis (UM 97507) (Cetaceamorpha, Basilosauridae) and †Dorudon atrox (UM 94812) (Cetaceamorpha, Basilosauridae).
Fig. 114 in An Anatomical And Phylogenetic Study Of The Osteology Of The Petrosal Of Extant And Extinct Artiodactylans (Mammalia) And Relatives
Fig. 114. Dorsomedial (cerebellar) views of left petrosal of Equus caballus (SB MP 55) (Perissodactyla, Hippomorpha). Scale 5 1 cm.
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.