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.
111
datasets available to search
ShareScore release 0.9.0
Dataset results
111 results for “acorns”
FIG. 1 in A new deep-sea species of epibenthic acorn worm (Hemichordata, Enteropneusta)
FIG. 1. — Collection site (depth: 3952-3953 m) for holotype and paratypes I-VI of Tergivelum baldwinae n. gen., n. sp.
Effect of Antibiotic Choice On ReNal Outcomes (ACORN)
ClinicalTrials.gov study NCT05094154. IPD Sharing: YES. Countries: 1. Publications: 26.
Data from: The effects of parasitism on sex allocation of a hermaphroditic acorn barnacle
Open the record for dataset details and reuse information.
Data from: Insights into the evolution, biogeography and natural history of the acorn ants, genus Temnothorax Mayr (Hymenoptera: Formicidae)
Open the record for dataset details and reuse information.
Data from: Does the history of option quality affect nest site choice in the acorn ant?
Open the record for dataset details and reuse information.
Data from: Acorn woodpeckers vocally discriminate current and former group members from non-group members
<p>In species with long-term social relationships, the ability to recognize individuals after extended separation, and the ability to discriminate between former social affiliates that have died and those that have left the group but may return, are likely to be beneficial. Few studies, however, have investigated whether animals can make these discriminations. We presented acorn woodpeckers (Melanerpes formicivorus), a group-living, cooperatively breeding bird, with playbacks of current group members, former group members still living nearby, former group members that had died or left the study area, and familiar non-group members. Subjects responded more quickly to the calls of non-group members than to the calls of current group members or former group members still living in the study area but did not discriminate between non-group members and former group members that had died or disappeared. This suggests that acorn woodpeckers can vocally recognize both current group members and former group members that have dispersed to nearby groups, and that they either forget former group members that no longer live in the vicinity, or classify them differently from former group members that still live nearby. This study suggests an important role for vocal recognition in maintaining valuable relationships with social affiliates post-dispersal.</p>
Data from: Testing adaptive hypotheses on the evolution of larval life history in acorn and stalked barnacles
Despite strong selective pressure to optimize larval life history in marine environments, there is a wide diversity with regard to developmental mode, size and time larvae spend in the plankton. In the present study, we assessed if adaptive hypotheses explain the distribution of the larval life history of thoracican barnacles within a strict phylogenetic framework. We collected environmental and larval trait data for 170 species from the literature, and utilized a complete thoracican synthesis tree to account for phylogenetic non-independence. In accordance with Thorson's rule, the fraction of species with planktonic-feeding larvae declined with water depth and increased with water temperature, while the fraction of brooding species exhibited the reverse pattern. Species with planktonic-nonfeeding larvae were overall rare, following no apparent trend. In agreement with the "size advantage" hypothesis proposed by Strathmann in 1977, egg and larval size were closely correlated. Settlement-competent cypris larvae were larger in cold water, indicative of advantages for large juveniles when growth is slowed. Planktonic larval duration, on the other hand, was uncorrelated to environmental variables. We conclude that different selective pressures appear to shape the evolution of larval life history in barnacles.
Experimental evidence that acorn woodpeckers recognize relationships among third parties no longer living together
<p>Triadic awareness, or knowledge of the relationships between others, is essential to navigating many complex social interactions. While some animals maintain relationships with former group members post-dispersal, recognizing cross-group relationships between others may be more cognitively challenging than simply recognizing relationships between members of a single group because there is typically much less opportunity to observe interactions between individuals that do not live together. We presented acorn woodpeckers (<i>Melanerpes formicivorus</i>), a highly social species,<i> </i>with playback stimuli consisting of a simulated chorus between two different individuals, a behavior that only occurs naturally between social affiliates. Subjects were expected to respond less rapidly if they perceived the callers as having an affiliative relationship. Females responded more rapidly to a pair of callers that never co-occurred in the same social group, and responded less rapidly to callers that were members of the same social group at the time of the experiment and to callers that last lived in the same group before the subject had hatched. This suggests that female acorn woodpeckers can infer the existence of relationships between conspecifics that live in separate groups by observing them interact after the conspecifics in question no longer live in the same group as each other. This study provides experimental evidence that nonhuman animals may recognize relationships between third parties that no longer live together and emphasizes the potential importance of social knowledge about distant social affiliates.</p>
Data from: Wild acorn woodpeckers recognize associations between individuals in other groups
According to the social intelligence hypothesis, understanding the cognitive demands of the social environment is key to understanding the evolution of intelligence. Many important socio-cognitive abilities, however, have primarily been studied in a narrow subset of the social environment—within-group social interactions—despite the fact that between-group social interactions often have a substantial effect on fitness. In particular, triadic awareness (knowledge about the relationships and associations between others) is critical for navigating many types of complex social interactions, yet no existing study has investigated whether wild animals can track associations between members of other social groups. We investigated inter-group triadic awareness in wild acorn woodpeckers (Melanerpes formicivorus), a socially complex group-living bird. We presented woodpeckers with socially incongruous playbacks that simulated two outsiders from different groups calling together, and socially congruous playbacks that simulated two outsiders from the same group calling together. Subjects responded more quickly to the incongruous playbacks, suggesting that they were aware that the callers belonged to two different groups. This study provides the first demonstration that animals can recognize associations between members of other groups under natural circumstances, and highlights the importance of considering how inter-group social selection pressures may influence the evolution of cognition.
Data from: Causes of seasonal decline in reproduction of the cooperatively-breeding acorn woodpecker
Clutch size and reproductive success decline seasonally in a wide range of temperate avian taxa. Two competing hypotheses have been proposed to explain such declines: the "timing" hypothesis, which states that conditions affecting reproduction decline intrinsically with date, and the "quality" hypothesis, which proposes that high-quality individuals or individuals in high-quality situations breed earlier. We contrasted the relative importance of these two hypotheses using a long-term dataset of the cooperatively-breeding acorn woodpecker (Melanerpes formicivorus) in central coastal California (USA). This population exhibits an 11% seasonal decline in clutch size, a 60% seasonal decline in fledging success, and a 77% seasonal decline in fledgling overwinter survival. Clutch size tracks seasonal availability of flying insects, which are a likely ecological driver of the seasonal decline in reproduction and, because of the nonlinear relationship of flying insects with date, constitute a likely factor constraining even earlier nesting. By parsing lay date data into within-female and between-female components, we found that only the within-female component had a statistically significant direct effect on clutch size, supporting the timing hypothesis. For both fledging success and overwinter survival, however, both within- and between-female effects were highly significant, with between-female effects (differences in female quality) being stronger than within-female effects. These results suggest that timing per se is a key factor affecting the seasonal decline in clutch size, but that both differences in female quality and an intrinsic seasonal decline in conditions drive the even more dramatic seasonal declines in fledging success and overwinter survivorship of fledglings.
Sacks of Roadside Acorns
These were collected for relocation (planting). I am wondering how long and how many trees it would take to remove my own carbon footprint. Two of these bags along with two bags of walnuts were used to plant both sides of 26 miles of a county road. I estimate 800 acorns, 400 walnuts, a >60% germination on the oaks, > 10-40% yield on the walnuts. Water activates germination along with cold. Sometimes the acorns are sorted out, put into gallon containers with good drainage, and rinsed daily. Other times, hand fulls, throwing scoops, and sling shots can disperse them so they are not easily found. Feeding local jay birds is a very good way to have many hidden for us and they don't eat all that they put out if they get gallons of them. Source: Objaverse 1.0 / Sketchfab
Ohlone Acorn Flour Grinding Stone
A photoscanned old grinding stone used to grind acorns into flour. Located at an old Ohlone native american settlement. Alviso Adobe Park, Pleasanton CA. Source: Objaverse 1.0 / Sketchfab
Dataset: Acorn weight as determinant of germination in red and white oaks: evidences from a common-garden greenhouse experiment
<p>This repository contains the files associated with the following article:</p> <p>Sánchez-Montes de Oca EJ, EI Badano, LE Silva-Alvarado, J Flores, F Barragán-Torres & JA Flores-Cano. Acorn weight as determinant of germination in red and white oaks: evidences from a common-garden greenhouse experiment. Annals of Forest Science, 75, article 12. <a href="https://doi.org/10.1007/s13595-018-0693-y">https://doi.org/10.1007/s13595-018-0693-y</a></p> <p>Both datasets are provided in Microsoft Excel format. The first dataset (2015 data-Relationships acorn fresh weight-germination) contains information about the phylogenetic section to which each oak species included in the study belong to, the fresh weights of acorns after they were soaked and their respective germination responses (100 acorns per oak species). These data were used to assess whether acorn weight influences germination across and within species. The second dataset (2017 data-Relationships acorn dry-fresh weights) also contains the phylogenetic section to which each oak species belongs to, indicating the dry biomass of acorns, their fresh weight after soaking, and their percent water content (100 acorns per oak species). These data were used to assess how dry biomass of acorns influences their fresh weight and percent water content after soaking.</p>
Bathymetric data for upper and lower Acorn Woman Lakes
<p>This Excel file contains the bathymetric data collected for upper Acorn Woman Lake (USL) and lower Acorn Woman Lake (SQB) for the publications:</p> <p>A 2700-year record of Cascadia megathrust and crustal/slab earthquakes from Acorn Woman Lakes, Oregon, and</p> <p>Sedimentary record of historic seismicity in a small, southern Oregon lake</p> <p>The core locations are also included for lower Acorn Woman lake.</p>
Acorn worm ossicle ultrastructure and composition and the origin of the Echinoderm skeleton
<p>The excel.data file with ossicle size measurement used to get the mean sizes and supplementary Fig. 2.</p> <p>Raw Raman spectra and R code used to determinate the polymorph of enteropneusts calcium carbonate ossicles, and make Fig. 3</p>
Data from: Causes of seasonal decline in reproduction of the cooperatively-breeding acorn woodpecker
Open the record for dataset details and reuse information.
Data from: Wild acorn woodpeckers recognize associations between individuals in other groups
Open the record for dataset details and reuse information.
Regional variation in insularity effects on acorn herbivory in European oaks challenges predictions of lower herbivory on islands
Open the record for dataset details and reuse information.
Experimental evidence that acorn woodpeckers recognize relationships among third parties no longer living together
Open the record for dataset details and reuse information.
Data from: Testing adaptive hypotheses on the evolution of larval life history in acorn and stalked barnacles
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.