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.
1,245
datasets available to search
ShareScore release 0.7.1
Dataset results
1,245 results for “dating”
Lunar dichotomy: Chang'e-6 2.83 Ga farside mare basalts reveal most depleted mantle to date
<p>The uploaded files contain the data and code used for plotting lunar crater chronology funtions. The Excel spreadsheet provides the N(1) values and sample ages for calibration points, along with the corresponding references.</p>
Figure 8 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 8. Bayesian inference tree from known and newly sequenced Mononchoides macrospiculum and Teratorhabditis synpapillata based on sequences of the 28S rDNA region. Bayesian posterior probabilities (%) are given for each clade. The scale bar shows the number of substitutions per site.
Figure 7 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 7. Bayesian inference tree from known and newly sequenced Mononchoides macrospiculum and Teratorhabditis synpapillata based on sequences of the 18S rDNA region. Bayesian posterior probabilities (%) are given for each clade. The scale bar shows the number of substitutions per site.
Figure 6 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 6. Trichouropoda sp. (scanning electron microscopy). (a–d) Idiosoma in dorsal, ventral, subventral and lateral views, respectively (arrows in (b) pointing to the peritremes, arrow in (c) pointing to the right stigma); (e) right stigma (arrow); (f) dorsal setae; (g, h) idiosoma anterior end in dorsal and ventral views, respectively (arrow pointing to the tritostemium); (i) right leg III (arrow pointing to the caruncle); (j) ventrianal view.
Figure 5 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 5. Rhynchophorus ferrugineus with Trichouropoda sp., in (a) dorsal and (b) ventral views. Trichouropoda sp. in (c) dorsal and (d) ventral views.
Figure 4 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 4. Mononchoides macrospiculum Troccoli, Oreste, Tarasco, Fanelli and De Luca, 2015 (scanning electron microscopy). (a, b) Lip region (arrow pointing to the phasmid); (c, d) cuticle (having numerous bacteria along the longitudinal grooves); (f–h) male posterior end. GP = genital papilla; ph = phasmid.
Figure 2. Teratorhabditis synpapillata Sudhaus, 1985 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 2. Teratorhabditis synpapillata Sudhaus, 1985 (scanning electron microscopy). (a, b) Lip region (arrow pointing to the phasmids); (c) female posterior end (arrow pointing to the phasmid); (d, e) cuticle (having numerous bacteria along the longitudinal grooves); (f) female tail; (g, h) male posterior end in lateral and subventral views, respectively (white arrows pointing to the genital papillae, black arrow pointing to the phasmid).
Figure 1. Teratorhabditis synpapillata Sudhaus, 1985 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 1. Teratorhabditis synpapillata Sudhaus, 1985 (light microscopy). (a) Neck (arrow pointing to the excretory pore); (b, c) anterior end at stoma and cuticle levels (arrow pointing to the amphid); (d) entire male; (e) entire female; (f) uterine egg; (g) female posterior end; (h) male posterior end. GP = genital papilla; ph = phasmid.
Figure 3 in Phoretic invertebrates associated with Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Canarian date palm from southern Spain
Figure 3. Mononchoides macrospiculum Troccoli, Oreste, Tarasco, Fanelli and De Luca, 2015 (light microscopy). (a) Entire female; (b) neck; (c, d) stoma in left and right view, respectively; (e) female reproductive system (arrows pointing to the oviduct–uterus sphincter); (f) uterine egg; (g) entire male; (h) female posterior end (arrow pointing to the phasmid); (i) testis; (j) cuticle; (k) spicules and gubernaculum; (l) male posterior end. GP = genital papilla; ph = phasmid.
Data from: Genome-wide association mapping of date palm fruit traits
Date palms (Phoenix dactylifera) are an important fruit crop of arid regions of the Middle East and North Africa. Despite its importance, few genomic resources exist for date palms, hampering evolutionary genomic studies of this perennial crop species. Here we report an improved long-read genome assembly for P. dactylifera that is 772.3 Mb in length, with contig N50 of 897.2 Kb, and use this to perform GWAS mapping of the sex determining region and 21 fruit traits. We find a fruit color GWAS at the R2R3-MYB transcription factor (VIRESCENS) gene and identify functional alleles that include a retrotransposon insertion and start codon mutation. We also find a GWAS peak for sugar composition spanning deletion polymorphisms in multiple linked invertase genes. MYB transcription factors and invertase are implicated in fruit color and sugar composition in other crop species, demonstrating the importance of parallel evolution in the evolutionary diversification of domesticated species.
Life-history trade-offs, density, lay date—not personality—explain multibroodedness in great tits
In various taxa, multibroodedness is a common breeding strategy. Life-history theory predicts that individuals can increase fitness by producing multiple broods within a season. Despite the apparent increase in the number of offspring parents might produce per season, not all individuals are multibrooded, suggesting a trade-off. We studied ecological and behavioral factors influencing the initiation of second clutches in great tits (Parus major), an optionally multibrooded bird species, by distinguishing two types of clutches: replacement vs. true second clutches, produced after failure vs. successful first breeding attempts, respectively. We predicted that lay date, density, and investment in first clutches would decrease the probability of initiating a second clutch, but that faster exploring behavioral types with a faster pace-of-life would be more likely to be multibrooded. The probability of initiating true second clutches varied negatively within-individuals with lay date and breeding density. The initiation of replacement clutches instead varied negatively among-individuals with lay date and density, suggesting non-random settlement of behavioral types across environments. Individuals were less likely to be multibrooded when producing many offspring from their first clutch, suggesting within-year reproductive trade-offs, similar to previous studies. No previous research has linked personality to multibroodedness; here we show that neither the repeatable nor the plastic part of an individual's exploratory behavior predicted multibroodedness. We confirmed our prediction that the resolution of trade-offs may occur either at the within- or among-individual level. Our research contributes to the understanding of life-history evolution in the wild by studying the mechanisms shaping multibroodedness within seasons. --
FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com] in Contributions of biogeographical functions to species accumulation may change over time in refugial regions
FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com]
FIGURES 5–8. 5 in Publication and dating of the journals forming the Annals and Magazine of Natural History and the Journal of Natural History
FIGURES 5–8. 5. An early (1858) blue wrapper of the Annals and Magazine of Natural History showing list of conductors (= editors) of the volume, and general contents; 6. Blue wrapper of a typical "Supplementary Number" of the Annals and Magazine of Natural History that often accompanied early volumes of the journal; 7. First change in design (1952) of the Annals and Magazine of Natural History since its inception in 1841; 8. Cover of the September 1952 issue of the Annals and Magazine of Natural History after its inclusion of the "Journal of Botany".
FIGURE 9–12. 9 in Publication and dating of the journals forming the Annals and Magazine of Natural History and the Journal of Natural History
FIGURE 9–12. 9. Cover of volume 1 of the Journal of Natural History; 10. Cover of volume 19 of the Journal of Natural History showing change to all yellow cover; 11. Early quotations in the prefatory pages of Annals and Magazine of Natural History; 12. Typical quotation trio found in the Annals and Magazine of Natural History until its cessation in 1967.
FIGURE 1–4 in Publication and dating of the journals forming the Annals and Magazine of Natural History and the Journal of Natural History
FIGURE 1–4. The title page of: 1. the first volume of the Magazine of Zoology and Botany; 2. the first volume of the Annals and Magazine of Natural History; 3. the first volume of Loudon's Magazine of Natural History showing original graphic design; 4. volume 3 of Loudon's Magazine of Natural History showing the change in graphic design.
Data from: A comprehensive and dated phylogenomic analysis of butterflies
Butterflies (Papilionoidea), with over 18,000 described species [1], have captivated naturalists and scientists for centuries. They play a central role in the study of speciation, community ecology, biogeography, climate change, and plant-insect interactions and include many model organisms and pest species [2, 3]. However, a robust higher-level phylogenetic framework is lacking. To fill this gap, we inferred a dated phylogeny by analyzing the first phylogenomic dataset, including 352 loci (> 150,000 bp) from 207 species representing 98% of tribes, a 35-fold increase in gene sampling and 3-fold increase in taxon sampling over previous studies [4]. Most data were generated with a new anchored hybrid enrichment (AHE) [5] gene kit (BUTTERFLY1.0) that includes both new and frequently used (e.g., [6]) informative loci, enabling direct comparison and future dataset merging with previous studies. Butterflies originated around 119 million years ago (mya) in the late Cretaceous, but most extant lineages diverged after the Cretaceous-Paleogene (K-Pg) mass-extinction 65 mya. Our analyses support swallowtails (Papilionidae) as sister to all other butterflies, followed by skippers (Hesperiidae) + the nocturnal butterflies (Hedylidae) as sister to the remainder, indicating a secondary reversal from diurnality to nocturnality. The whites (Pieridae) were strongly supported as sister to brush-footed butterflies (Nymphalidae) and blues + metalmarks (Lycaenidae and Riodinidae). Ant association independently evolved once in Lycaenidae and twice in Riodinidae. This study overturns prior notions of the taxon's evolutionary history, as many long-recognized subfamilies and tribes are para- or polyphyletic. It also provides a much-needed backbone for a revised classification of butterflies and for future comparative studies including genome evolution and ecology.
The biomolecular characterisation of a finger ring contextually dated to the emergence of the Early Neolithic from Syltholm, Denmark
<p>We present the analysis of an osseous finger ring from a predominantly early Neolithic context in Denmark. To characterise the artefact and identify the raw material used for its manufacture, we performed micro-computed tomography (Micro CT) scanning, zooarchaeology by mass spectrometry (ZooMS) peptide mass fingerprinting, as well as protein sequencing by liquid chromatography tandem mass spectrometry (LC-MS/MS). We conclude that the ring was made from long bone or antler due to the presence of osteons (Haversian canals). Subsequent ZooMS analysis of collagen I and II indicated that it was made from <em>Alces alces</em> or <em>Cervus elaphus</em> material. We then used LC-MS/MS analysis to refine our species identification, confirming that the ring was made from Cervus elaphus, and to examine the rest of the proteome. This study demonstrates the potential of ancient proteomics for species identification of prehistoric artefacts made from osseous material.</p>
Figure 1 in First record of the invasive Asian date mussel Arcuatula senhousia (Benson, 1842) (Mollusca: Bivalvia: Mytilidae) in West Africa
Figure 1. (a) Photograph of the Asian date mussel specimen and (b) location where it was collected (circle), in a vast mudflat off the north-western coast of Bubaque in the Bijagós archipelago of Guinea-Bissau, West Africa.
Figure 5 in Phytoseiidae from date palms in Israel with descriptions of two new taxa and a key to the species found on date palms worldwide (Acari: Mesostigmata)
Figure 5. Neoseiulus conterminus. (A) Dorsal view; (B) ventral view; (C) chelicera; (D) spermatheca; (E) leg IV.
Figure 7 in Phytoseiidae from date palms in Israel with descriptions of two new taxa and a key to the species found on date palms worldwide (Acari: Mesostigmata)
Figure 7. Cydnoseius negevi. (A) Dorsal view; (B) ventral view; (C) chelicera; (D) spermatheca; (E) leg IV; (F) male spermatodactyl.
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.