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.
60
datasets available to search
ShareScore release 0.9.0
Dataset results
60 results for “size ratios”
Data from: Reliable effective number of breeders/adult census size ratios in seasonal-breeding species: opportunity for integrative demographic inferences based on capture-mark-recapture data and multilocus genotypes
Open the record for dataset details and reuse information.
Brain size affects responsiveness in mating behavior to variation in predation pressure and sex-ratio
Open the record for dataset details and reuse information.
Data from: The effect of size and sex-ratio experiences on reproductive competition in Nicrophorus vespilloides burying beetles in the wild
Open the record for dataset details and reuse information.
Comparing the strength of modular signal, and evaluating alternative modular hypotheses, using covariance ratio effect sizes with morphometric data
Open the record for dataset details and reuse information.
Density dependence of clutch size and offspring sex ratio in starling colonies
Open the record for dataset details and reuse information.
Data from: Breeding sex ratio and population size of loggerhead turtles from Southwestern Florida
Open the record for dataset details and reuse information.
The iron isotopic composition and the elemental ratios (Cd/Ti) in the size-fractionated aerosols collected over the East China Sea
Open the record for dataset details and reuse information.
Data from: Sex ratio of Western Bluebirds Sialia mexicana is mediated by phenology and clutch size
<p><span><span><span><span><span><span><span><span><span><span><span>Mothers may produce more of one sex to maximize their fitness if there are differences in the cost of producing each sex or there are differences in their relative reproductive value. We tested if breeding date, clutch size and drought conditions influenced offspring sex ratios in Western Bluebirds (<em>Sialia mexicana</em>) from 1997 to 2017. We found that hatch dates late in the breeding season were associated with the production of more females. When clutch size was taken into account, small clutches yielded significantly more females late in the breeding season compared to the early and middle parts of the breeding season that produced significantly more males. Large clutches early in the season tended to produce more females, although this was not significant. Drought severity was not correlated with sex ratio adjustment. </span></span></span></span></span></span></span></span></span></span></span></p>
Data from: Sex ratio and gamete size across eastern North America in Dictyostelium discoideum, a social amoeba with three sexes
Theory indicates that numbers of mating types should tend towards infinity or remain at two. The social amoeba, Dictyostelium discoideum, however, has three mating types. It is therefore a mystery how this species has broken the threshold of two mating types, but has not increased towards a much higher number. Frequency dependent selection on rare types in combination with isogamy, a form of reproduction involving gametes similar in size, could explain the evolution of multiple mating types in this system. Other factors, such as drift, may be preventing the evolution of more than three. We first looked for evidence of isogamy by measuring gamete size associated with each type. We found no evidence of size dissimilarities between gametes. We then looked for evidence of balancing selection, by examining mating type distributions in natural populations and comparing genetic differentiation at the mating type locus to that at more neutral loci. We found that mating type frequency varied among the three populations we examined, with only one of the three showing an even sex ratio, which does not support balancing selection. However, we found more population structure at neutral loci than the mating type locus, suggesting that the three mating types are indeed maintained at intermediate frequencies by balancing selection. Overall, the data are consistent with balancing selection acting on D. discoideum mating types, but with a sufficiently weak rare sex advantage to allow for drift, a potential explanation for why these amoebae have only three mating types.
Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies
1. Species' range sizes are shaped by fundamental differences in species' ecological and evolutionary characteristics, and understanding the mechanisms determining range size can shed light on the factors responsible for generating and structuring biological diversity. Moreover, because geographic range size is associated with a species' risk of extinction and their ability to respond to global changes in climate and land use, understanding these mechanisms has important conservation implications. 2. Despite hypotheses that dispersal behaviour is a strong determinant of species range areas, few data are available to directly compare the relationship between dispersal behaviour and range size. Here, we overcome this limitation by combining data from a multi-species dispersal experiment with additional species-level trait data that are commonly hypothesized to affect range size (e.g. niche-breadth, local abundance, and body size, etc.). This enables us to examine the relationship between these species-level traits and range size across North America for fifteen dragonfly species. 3. Ten models based on a priori predictions about the relationship between species traits and range size were evaluated and two models were identified as good predictors of species range size. These models indicated that only two species' level traits, dispersal behaviour and niche breadth were strongly related to range size. The evidence from these two models indicated that dragonfly species that disperse more often and further had larger North American ranges. 4. Extinction and colonization dynamics are expected to be a key linkage between dispersal behaviour and range size in dragonflies. To evaluate how extinction and colonization dynamics among dragonflies were related to range size we used an independent data set of extinction and colonization rates for eleven dragonfly species and assessed the relationship between these populations rates and North American range areas for these species. 5. We found a negative relationship between North American range size and species' extinction to colonization ratios. Our results indicate that metapopulation dynamics act to shape the extent of species' continental distributions. These population dynamics are likely to interact with dispersal behaviour, particularly at species range margins, to determine range limits and ultimately species range sizes.
Data from: The mechanics of predator-prey interactions: first principles of physics predict predator-prey size ratios
Open the record for dataset details and reuse information.
Data from: Sex ratio and gamete size across eastern North America in Dictyostelium discoideum, a social amoeba with three sexes
Open the record for dataset details and reuse information.
Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies
Open the record for dataset details and reuse information.
Data from: Predator size and prey size-gut capacity ratios determine kill frequency and carcass production in terrestrial carnivorous mammals
Open the record for dataset details and reuse information.
Data from: Sex ratio of Western Bluebirds Sialia mexicana is mediated by phenology and clutch size
Open the record for dataset details and reuse information.
DNA:cytoplasm ratio defines an upper limit to cell size [array]
GEO Series GSE111075. Saccharomyces cerevisiae; Saccharomyces cerevisiae W303. 8 samples. Type: Expression profiling by array.
DNA:cytoplasm ratio defines an upper limit to cell size [RNA-seq]
GEO Series GSE110704. Candida albicans; Saccharomyces cerevisiae. 20 samples. Type: Expression profiling by high throughput sequencing.
DNA:cytoplasm ratio defines an upper limit to cell size
GEO Series GSE111076. Saccharomyces cerevisiae; Candida albicans; Saccharomyces cerevisiae W303. 28 samples. Type: Expression profiling by high throughput sequencing; Expression profiling by array.
Mitotic chromosomes scale to nucleo-cytoplasmic ratio and cell size in Xenopus
GEO Series GSE217111. Xenopus laevis. 4 samples. Type: Other.
Explained variation of the untransformed measurements, the size related ratios, and the ratios defined by the literature for the first two components of the principal component analyses. Abbreviations are explained in table 1. in Morphological variation of the widely distributed genus Stenocorse Marsh, 1968 (Hymenoptera: Braconidae: Doryctinae)
Explained variation of the untransformed measurements, the size related ratios, and the ratios defined by the literature for the first two components of the principal component analyses. Abbreviations are explained in table 1.
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.