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732 results for “population variation”
Extensive population-level sampling reveals clinal variation in (R)-(-)-linalool produced by the flowers of an endemic evening primrose, Oenothera harringtonii
<div></div> <div> <div> <p>The study of floral trait diversity has a long history due to its role in angiosperm diversification. While many studies have focused on visual traits including morphology and color, few have included floral scent despite its importance in pollination. Of the studies that have included floral scent, sampling has been limited and rarely explores variation at the population level. We studied geographic variation in the flowers of <em>Oenothera harringtonii</em>, a rare plant endemic to a vulnerable shortgrass prairie habitat, whose population structure and conservation status are well studied. The self-incompatible flowers of <em>O. harringtonii</em> open at dusk, produce nectar and a strong fragrance, and are pollinated by hawkmoths. We collected floral trait (morphology, scent chemistry and emission rates) data from 650 individuals from 19 wild populations to survey floral variation across the entire range of this species. Similarly, we collected floral data from 49 individuals grown in a greenhouse common garden, to assess whether variation observed in the field is consistent when environment factors (temperature, watering regime, soil) are standardized. We identified 35 floral volatiles representing 5 biosynthetic classes. Population differentiation was stronger for floral scent chemistry than floral morphology. (<em>R</em>)-(−)-linalool was the most important floral trait differentiating populations, exhibiting clinal variation across the distribution of <em>O. harringtonii</em> without any correlated shifts in floral morphology. Populations in the north and west produced (<em>R</em>)-(−)-linalool consistently, those in the east and south largely lacked it, and populations at the center of the distribution were polymorphic. Floral scent emissions in wild populations varied across four years but chemical composition was largely consistent over time. Similarly, volatile emission rates and chemical composition in greenhouse-grown plants were consistent with those of wild populations of origin. Our data set, which represents the most extensive population-level survey of floral scent to date, indicates that such sampling may be needed to capture potentially adaptive geographic variation in wild populations.</p> </div> </div>
Population dynamics of Amazonian floodplain forest species support spatial variation on genetic diversity but not range expansions through time
<p><strong>Aim: </strong>We tested if historical demographic changes of populations occurring on the floodplains of a major Amazon Basin tributary could be associated with range expansions from upper and middle sections of the river, following the establishment of widespread river-created environments during the Late Pleistocene and Holocene.</p> <p><strong>Location: </strong>Solimões River, Western Amazon, South America.</p> <p><strong>Taxon: </strong><em>Myrmoborus lugubris</em>, <em>Thamnophilus cryptoleucus</em> and <em>Myrmotherula assimilis</em>.</p> <p><strong>Methods:</strong> We explored spatial patterns of genetic diversity and connectivity among sampled localities using thousands of Ultra-Conserved Elements. Range expansions were tested with alternative methods. We quantified habitat preference for the analyzed species to test whether the occupation of dynamic habitats could predict spatial patterns of genetic diversity.</p> <p><strong>Results: </strong>Our study did not support shared population range expansions related to historical regionalized changes in habitat availability. We found considerable variation in the spatial distribution of the genetic diversity between studied taxa, and that species with higher levels of specialization to dynamic environments have a more heterogeneous distribution of genetic diversity and reduced levels of gene flow across space.</p> <p><strong>Main conclusions:</strong> Our results suggest that demographic expansions along the Solimões River might be linked to spatially homogeneous oscillation in the distribution of floodplain environments, promoting effective population size changes but not range expansion. We found that habitat specificity might be a good predictor of population connectivity along the Amazonian floodplains.</p>
The effect of migration and variation on populations of Escherichia coli adapting to complex fluctuating environments
<p class="MsoNormal"><span>Migration, a critical evolutionary force, can have contrasting effects on adaptation. It can aid as well as impede adaptation. The effects of migration on microbial adaptation have been studied primarily in simple constant environments. Very little is known about the effects of migration on adaptation to complex, fluctuating environments. In our study, we subjected replicate populations of <em><span>Escherichia coli</span></em>, adapting to complex and unpredictably fluctuating environments to different proportions of clonal ancestral immigrants. Contrary to the results from simple/constant environments, the presence of clonal immigrants reduced all measured proxies of fitness. However, migration from a source population with a greater variance in fitness resulted in no change in fitness w.r.t the no-migration control, except at the highest level of migration. Thus, the presence of variation in the immigrants could counter the adverse effects of migration in complex and unpredictably fluctuating environments. Our study demonstrates that the effects of migration are strongly dependent on the nature of the destination environment and the genetic makeup of immigrants. These results enhance our understanding of the influences of migrating populations, which could help better predict the consequences of migration.</span></p>
Variation and plasticity in life-history traits and fitness of wild Arabidopsis thaliana populations are not related to their genotypic and ecological diversity
<p>Despite its implications for population dynamics and evolution, the relationship between genetic and phenotypic variation in wild populations remains unclear. Here, we estimated variation and plasticity in life-history traits and fitness of the annual plant <em>Arabidopsis thaliana</em> in two common garden experiments that differed in environmental conditions. We used up to 306 maternal inbred lines from six Iberian populations characterized by low and high genotypic (based on whole-genome sequences) and ecological (vegetation type) diversity. Low and high genotypic and ecological diversity was found in edge and core Iberian environments, respectively. Given that selection is expected to be stronger in edge environments and that ecological diversity may enhance both phenotypic variation and plasticity, we expected genotypic diversity to be positively associated with phenotypic variation and plasticity. However, maternal lines, irrespective of the genotypic and ecological diversity of their population of origin, exhibited a substantial amount of phenotypic variation and plasticity for all traits. Furthermore, all populations harbored maternal lines with canalization (robustness) or sensitivity in response to harsher environmental conditions in one of the two experiments. Overall, we conclude that the environmental attributes of each population probably determine their genotypic diversity, but all populations maintain substantial phenotypic variation and plasticity for all traits, which represents an asset to endure in changing environments.</p>
Data from: Genome-wide scans reveal selection signatures and cross-population variation in South African and European beef cattle breeds
<p>In genetics and evolutionary biology, the concept of selection signatures is used to describe specific patterns in the genome that are associated with the process of natural selection. These selection signatures provide insights into how evolutionary forces have shaped a population over time.In this study, a total of 96 samples were collected in several farms from four different cattle breeds, namely South African indigenous Nguni (n = 28) and Bonsmara (n = 21), Scottish Angus (n = 22), and Swedish Simmental (n = 25). Genotyped samples were subjected to quality control, and a total of 105,675 SNPs from 78 individuals remained for further analysis. Genomic signatures of positive selection within each breed were identified using the Integrated Haplotype Score (iHS) method, and cross-population comparison analysis using cross-population extended haplotype homozygosity ( XP-EHH), relative extended haplotype homozygosity (Rsb), and fixation index (Fst) methods, to assess the genetic differences between breeds. The results from the iHS method revealed selection signatures in two genomic regions for Bonsmara, six for Simmental, four for Nguni, and one for Angus cattle. Ten regions were found to be under selection, with BTA 12 being shared between Nguni and Bonsmara. Comparisons across populations using Rsb, and Fst methods performed better and revealed the most specific genomic regions that varied in selection between breeds. Gene annotation analyses linked candidate genes to several Quantitative Trait Loci (QTL). For example, in Simmental cattle's FAM110B gene was linked to carcass weight and body confirmation score. Bonsmara showed fewer candidate genes, such as CDK8 and FLT1, whereas Angus had none on BTA 18. Nguni identified potential genes such as CRB1, PLAG2GA, and VASH2, with CDK8 shared by Bonsmara and Nguni on BTA 12. Further cross-population studies revealed candidate genes associated with certain traits, genes including as PLCXD3, FAM149B1, and GRIK2 for Bonsmara versus Nguni, and SLIT2 and TSPAN9 for Simmental vs Angus. The study also emphasised gene related to meat quality, reproduction, health, illnesses, fertility, and body conformation score. Gene interaction study with the STRING database revealed a network of 63 candidate genes, demonstrating the structure of genetic connections, some biological processes. The study found that iHS performed well in population analysis with Nguni cattle, having exhibited the highest number of signatures across the genome, and significant signatures were also seen in comparisons between Nguni and Bonsmara using the Fst and Rsb methods. Furthermore, the study discovered that a bigger number of genes were connected with various traits, including sperm count and insemination per conception, sensitivity to bovine respiratory disease, and ease of calving. This genomic analysis underlined the relevance of the genetic relying which distinguishes distinct breeds. This understanding has the potential to significantly enhance selective breeding and increase desirable traits in cattle herds. This genomic analysis underlined the significance of the genetic basis for breed-specific traits. This understanding has the potential to drastically improve selective breeding and increase desirable traits in cattle herds.</p>
Morphological and phenological variation of flower colour morphs in a wild population of Opuntia streptacantha (Cactaceae)
<p>[ESP]</p> <p>Este repositorio contiene archivos .csv y .r, de los datos se utilizaron para el análisis estadístico del artículo de Manzanarez-Villasana y Mandujano en Plant Ecology and Evolution ( <a href="https://doi.org/10.5091/plecevo.112250" target="_blank" rel="noopener">https://doi.org/10.5091/plecevo.112250</a>)</p> <p>[ENG]</p> <p>This repository contains .csv and .r files of the data used for the statistical analysis of the article by Manzanarez-Villasana and Mandujano in Plant Ecology and Evolution (<a href="https://doi.org/10.5091/plecevo.112250" target="_blank" rel="noopener">https://doi.org/10.5091/plecevo.112250</a>).</p>
Fig. 2 in Altitudinal Variation In Population Density, Body Size And Morphometric Structure In C A R A B U S O D O R At U S S H I L, 1996 (C O L E O P T E R A: Carabidae)
Fig. 2. Sampling localities of C. odoratus.
Fig. 9 in Altitudinal Variation In Population Density, Body Size And Morphometric Structure In C A R A B U S O D O R At U S S H I L, 1996 (C O L E O P T E R A: Carabidae)
Fig. 9. Results of each trait variation in C. odoratus at different altitudes.
Study on the mating systems of wild rice Oryza rufipogon and O. nivara and their effects on population genetic variation
<p>As the wild ancestors of Asian cultivated rice,<em> Oryza rufipogon</em> Griff. and <em>O. nivara</em> Sharma et Shastry serve as valuable germplasms for rice breeding. Mating systems are important in shaping the level and pattern of population genetic variation, and are crucial for germplasm conservation. We genotyped 12 simple sequence repeats (SSR) markers for a large number of maternal plants and seeds collected from <em>O</em>.<em> rufipogon</em> and <em>O. nivara</em> populations distributed in Southeast Aisa and South China. Based on the 12 SSR markers, we estimated the outcrossing rates and other parameters of the mixed-mating model for the two wild rice species. We also assessed the level of genetic diversity and population structure for parental populations of <em>O</em>.<em> rufipogon</em> and <em>O. nivara</em>. Our study could facilitate <em>in situ</em> and <em>ex situ</em> conservation, and the utilization of these valuable germplasm resources.</p>
Variation and overlaps in non-breeding regions of the Eurasian Reed Warbler: insight from three breeding populations
<p>Data for Variation and overlaps in non-breeding regions of the Eurasian Reed Warbler: insight from three breeding populations</p>
Figure 6 in Infraspecific genetic variation and population structure of Salvia nemorosa L. (Lamiaceae) in Iran
Figure 6. UPGMA tree of the studied populations based on Nei's genetic distance.
Figure 5 in Infraspecific genetic variation and population structure of Salvia nemorosa L. (Lamiaceae) in Iran
Figure 5. STRUCTURE plot of the studied populations of S. nemorosa based on k = 7 of ISSR results.
Figure 3 in Morphological variation among populations of Mesalina watsonana (Stoliczka, 1872) (Sauria: Lacertidae) in Iran
Figure 3. Dendrogram resulting from cluster analysis of 3 OTUs of Mesalina watsonana.
Figure 4 in Determination of genetic variations between Apodemus mystacinus populations distributed in Turkey inferred from mtDNA PCR-RFLP
Figure 4. UPGMA dendrogram of the composite data by combining cytb and D-loop regions.
Open dataset for the research of "Assessing accuracy improvement of integrating digital footprints into gridded population mapping: spatiotemporal variations and data bias"
<p>Result datasets for "Assessing accuracy improvement of integrating digital footprints into gridded populationmapping:spatiotemporal variations and data bias":</p> <ol> <li> S1 is the results for gridded population mapping using different methods.</li> <li> S2 is the aggregate results of population mapping at county level.</li> <li> S3 is the results for intraday variation of population disaggregation accuracy,</li> <li> S4 is the data bias of different digital footprints.</li> </ol>
Data from: Intraspecific variation and symmetry of the inner-ear labyrinth in a population of wild turkeys: implications for paleontological reconstructions
The cochlea and semicircular canals of the inner ear are vital neurosensory devices. There are associations between the anatomy of these sensorineural structures, their function, and the function of related biological systems, e.g., hearing ability, gaze stabilization, locomotor agility, and posture. The endosseous labyrinth is frequently used as a proxy to infer the performance of the hearing and vestibular systems, locomotor abilities, and ecology of extinct species. Such fossil inferences are often based on single specimens or even a single ear, representing an entire species. To address whether a single ear is representative of a population, we used geometric morphometrics to quantitatively assess the variation in shape and symmetry in a sample of endosseous labyrinths of wild turkeys Meleagris gallopavo of southern Ohio. We predicted that ears would be symmetrical both within individuals and across the sample; that labyrinth shape and size would covary; that labyrinth shape would vary with the size of the brain, measured as width of the endocranium at the cerebellum; and that labyrinths would be morphologically integrated. To test these predictions, we microCT-scanned the heads of 26 cadaveric turkeys, digitally segmented their endosseous labyrinths in Avizo, and assigned 15 manual landmarks and 20 sliding semilandmarks to each digital model. Following Procrustes alignment, we conducted an analysis of bilateral symmetry, a Procrustes regression analysis for allometry and other covariates including side and replicate, and analyses of global integration and modularity. Based on Procrustes distances, no individual's left and right ears were clearly different from each other. When comparing the ears of different specimens, statistically clear differences in shape were found in only 66 of more than 1300 contrasts. Moreover, effects of both directional and fluctuating asymmetry were very small—generally, two orders of magnitude smaller than the variance explained by individual variation. Statistical tests disagreed on whether these asymmetric effects crossed the threshold of significance, possibly due to non-isotropic variation among landmarks. Regardless, labyrinths appeared to primarily vary in shape symmetrically. Neither labyrinth size nor endocranial width was correlated with labyrinth shape, contrary to our expectations. Finally, labyrinths were found to be moderately integrated in a global sense, but four weakly separated modules—the three semicircular canals and cochlea—were recovered using a maximum-likelihood analysis. The results show that both fluctuating and directional asymmetry play a larger role in shape variation than expected—but nonetheless, endosseous labyrinths are symmetrical within individuals and at the level of the population, and their shape varies symmetrically. Thus, inferences about populations, and very possibly species, may be confidently made when only a single specimen, or even a single ear, is available for study.
Functional consequences of phenotypic variation between locally adapted populations: swimming performance and ventilation in extremophile fish
<p>Natural selection drives the evolution of traits to optimize organismal performance, but optimization of one aspect of performance can often influence other aspects of performance. Here, we asked how phenotypic variation between locally adapted fish populations affects locomotion and ventilation, testing for functional trade-offs and trait-performance correlations. Specifically, we investigated two populations of livebearing fish (<em>Poecilia mexicana</em>) that inhabit distinct habitat types (hydrogen-sulfide-rich springs and adjacent nonsulfidic streams). For each individual, we quantified different metrics of burst swimming during simulated predator attacks, steady swimming, as well as gill ventilation. Coinciding with predictions, we documented significant population differences in all aspects of performance, with fish from sulfidic habitats exhibiting higher steady swimming performance and higher ventilation capacity, but slower burst swimming. There was a significant functional trade-off between steady and burst swimming, but not between different aspects of locomotion and ventilation. While our findings about population differences in locomotion performance largely parallel the results from previous studies, we provide novel insights about how morphological variation might impact ventilation and ultimately oxygen acquisition. Overall, our analyses provided insights into the functional consequences of previously documented phenotypic variation, which will help to disentangle the effects of different sources of selection that may coincide along complex environmental gradients.</p>
The effects of climate and demographic history in shaping genomic variation across populations of the Desert Horned Lizard (Phrynosoma platyrhinos)
<p>Species often experience spatial <span class="NormalTextRun SCXW235808685 BCX2">environmental </span><span class="NormalTextRun SCXW235808685 BCX2">heterogeneity </span><span class="NormalTextRun SCXW235808685 BCX2">across their range</span><span class="NormalTextRun SCXW235808685 BCX2">, </span><span class="NormalTextRun SCXW235808685 BCX2">and </span><span class="NormalTextRun SCXW235808685 BCX2">populations </span><span class="NormalTextRun SCXW235808685 BCX2">may exhibit </span><span class="NormalTextRun SCXW235808685 BCX2">signatures </span><span class="NormalTextRun SCXW235808685 BCX2">of adaptation to local environmental </span><span class="NormalTextRun SCXW235808685 BCX2">characteristics.</span><span class="NormalTextRun SCXW235808685 BCX2"> Other population</span><span class="NormalTextRun SCXW235808685 BCX2"> genetic</span><span class="NormalTextRun SCXW235808685 BCX2"> processes, </span><span class="NormalTextRun SCXW235808685 BCX2">such as </span><span class="NormalTextRun SCXW235808685 BCX2">migration and genetic drift, </span><span class="NormalTextRun SCXW235808685 BCX2">can </span><span class="NormalTextRun SCXW235808685 BCX2">impede the effect</span><span class="NormalTextRun SCXW235808685 BCX2">s</span><span class="NormalTextRun SCXW235808685 BCX2"> of </span><span class="NormalTextRun SCXW235808685 BCX2">local adaptation</span><span class="NormalTextRun SCXW235808685 BCX2">. Genetic drift </span><span class="NormalTextRun SCXW235808685 BCX2">in particular </span><span class="NormalTextRun SCXW235808685 BCX2">can have a pronounced effect on population genetic structure during large-scale geographic expansions, where a series of founder effects lead</span><span class="NormalTextRun SCXW235808685 BCX2">s</span><span class="NormalTextRun SCXW235808685 BCX2"> to decreases in genetic variation in the direction of the expansion. </span><span class="NormalTextRun SCXW235808685 BCX2">Here </span><span class="NormalTextRun SCXW235808685 BCX2">we explore the </span><span class="NormalTextRun SCXW235808685 BCX2">genetic diversity</span><span class="NormalTextRun SCXW235808685 BCX2"> of a desert lizard that occupies a wide range of environmental conditions and that has experienced post-glacial expansion northwards along two colonization routes. </span><span class="NormalTextRun SCXW235808685 BCX2">Based on our analyses of a large SNP dataset, we find evidence </span><span class="NormalTextRun SCXW235808685 BCX2">that both </span><span class="NormalTextRun SCXW235808685 BCX2">climate and demographic history</span><span class="NormalTextRun SCXW235808685 BCX2"> </span><span class="NormalTextRun SCXW235808685 BCX2">have </span><span class="NormalTextRun SCXW235808685 BCX2">shape</span><span class="NormalTextRun SCXW235808685 BCX2">d</span><span class="NormalTextRun SCXW235808685 BCX2"> the </span><span class="NormalTextRun SCXW235808685 BCX2">genetic</span><span class="NormalTextRun SCXW235808685 BCX2"> structure of</span><span class="NormalTextRun SCXW235808685 BCX2"> populations. </span><span class="NormalTextRun SCXW235808685 BCX2">P</span><span class="NormalTextRun SCXW235808685 BCX2">ronounced genetic differentiation</span><span class="NormalTextRun SCXW235808685 BCX2"> was evident </span><span class="NormalTextRun SCXW235808685 BCX2">between populations occupying cold versus hot desert</span><span class="NormalTextRun SCXW235808685 BCX2">s</span><span class="NormalTextRun SCXW235808685 BCX2">,</span><span class="NormalTextRun SCXW235808685 BCX2"> and </span><span class="NormalTextRun SCXW235808685 BCX2">we </span><span class="NormalTextRun SCXW235808685 BCX2">detected numerous loci </span><span class="NormalTextRun SCXW235808685 BCX2">with </span><span class="NormalTextRun SCXW235808685 BCX2">significant association</span><span class="NormalTextRun SCXW235808685 BCX2">s</span><span class="NormalTextRun SCXW235808685 BCX2"> with climate. The genetic signal of founder effect</span><span class="NormalTextRun SCXW235808685 BCX2">s</span><span class="NormalTextRun SCXW235808685 BCX2">, however, is still present in the genomes of the recently expanded populations</span><span class="NormalTextRun SCXW235808685 BCX2">, </span><span class="NormalTextRun SCXW235808685 BCX2">which</span><span class="NormalTextRun SCXW235808685 BCX2"> comprise subsets of genetic variation found in the southern populations, and </span><span class="NormalTextRun SCXW235808685 BCX2">we found substantial evidence that </span><span class="NormalTextRun SCXW235808685 BCX2">genetic diversity of lizards differs along the two colonization routes.</span></p>
Data from: Exploring genomic variation associated with drought stress in Picea mariana populations
Predicted increases in drought and heat stress will likely induce shifts in species bioclimatic envelopes. Genetic variants adapted to water limitation may prove pivotal for species response under scenarios of increasing drought. In this study, we aimed to explore this hypothesis by investigating genetic variation in 16 populations of black spruce (Picea mariana) in relation to climate variables in Alaska. A total of 520 single nucleotide polymorphisms (SNPs) were genotyped for 158 trees sampled from areas of contrasting climate regimes. We used multivariate and univariate genotype-by-environment approaches along with available gene annotations to investigate the relationship between climate and genetic variation among sampled populations. Nine SNPs were identified as having a significant association with climate, of which five were related to drought stress response. Outlier SNPs with respect to the overall environment were significantly overrepresented for several biological functions relevant for coping with variable hydric regimes, including osmotic stress response. This genomic imprint is consistent with local adaptation of black spruce to drought stress. These results suggest that natural selection acting on standing variation prompts local adaptation in forest stands facing water limitation. Improved understanding of possible adaptive responses could inform our projections about future forest dynamics and help prioritize populations that harbor valuable genetic diversity for conservation.
Within-year and among-year variation in impacts of targeted conservation management on juvenile survival in a threatened population
<p>1. Overall impacts of targeted conservation interventions on population growth rate (λ) will depend on within-year and among-year variation in exposure of target individuals to interventions, and in intervention efficacy in increasing vital rates of exposed individuals. Juvenile survival is one key vital rate that commonly varies substantially within and among years, and consequently drives variation in λ. However, within-year, among-year and overall impacts of targeted interventions on population-wide survival probabilities of potentially mobile juveniles are rarely quantified, precluding full evaluation and evidence-based refinement of interventions.</p> <p>2. We applied multi-state mark-recapture models to eight years of ring-resighting data from a threatened red-billed chough (<i>Pyrrhocorax pyrrhocorax</i>) population to quantify within-year and among-year variation in juvenile exposure to a targeted intervention of supplementary feeding and parasite treatment, and to estimate efficacy in increasing juvenile survival probability. We then combined and up-scaled these estimated effects to evaluate the impact of the eight-year intervention on overall population-wide survival probability and resulting population size.</p> <p>3. High proportions of surviving juveniles (>70%) were exposed to the intervention across the annual biological cycle in all years. Exposure was associated with higher short-term survival probabilities through the full annual cycle. Consequently, management increased estimated population-wide annual juvenile survival by approximately 0.14. However, such effects were only evident in cohorts with low overall annual survival.</p> <p>4. Population models projected that these impacts on annual juvenile survival substantially reduced population decline, such that population size at the end of the eight-year intervention was approximately double that without management.</p> <p>5. Synthesis and applications. Our results show how complex patterns of within-year and among-year variation in exposure and efficacy of targeted conservation interventions can arise and scale up to affect population-level outcomes. We demonstrate positive effects of a major intervention, but also highlight potential routes to improve efficacy, for example through more precise targeting of agricultural management actions in the context of among-year variation in environmental conditions.</p>
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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.