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.
45
datasets available to search
ShareScore release 0.9.0
Dataset results
45 results for “response ratio”
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: Mass ratio effects underlie ecosystem responses to environmental change
Open the record for dataset details and reuse information.
Extraordinarily precise nematode sex ratios: adaptive responses to vanishingly rare mating opportunities
Open the record for dataset details and reuse information.
Mass ratio effects underlie ecosystem responses to environmental change
Open the record for dataset details and reuse information.
Data from: Daphnia females adjust sex allocation in response to current sex ratio and density
Open the record for dataset details and reuse information.
Divergence of responses to variable socio-sexual environments in laboratory populations of Drosophila melanogaster evolving under altered operational sex-ratios
<p class="BodyA">Post-copulatory sexual selection (PSS) is an important selective force that determines fitness in polyandrous species. PSS can be intense in some cases and can drive the evolution of remarkable ejaculate properties. In males, investment in ejaculate plays an important role in the outcome of PSS. Thus, males are expected to adaptively tailor their ejaculate according to the perceived competition in their vicinity. Plastic responses in ejaculate investment to variation in intra-sexual competition are disparate and widespread in males.</p> <p class="BodyA"><span>We investigated the evolution of plasticity in reproductive traits using <i>Drosophila melanogaster</i> populations evolving for more than 150 generations under male- or female-biased sex ratios.</span> <span>When exposed to different numbers of competitors early in their life, males from these two regimes responded differently in terms of their copulation duration and sperm competitive ability. In addition, the effect of this early life experience wore off at different rates in males of male-biased and female-biased regimes with increasing time from the removal of competitive cues. Furthermore, our study finds that males change their reproductive strategies depending upon the identity of rival males. Together, our results provide evidence of the evolution of male reproductive investment that depends on socio-sexual cues experienced early in life. </span></p>
Data from: Caste ratio adjustments in response to perceived and realised competition in parasites with division of labour
1. Colonial organisms with division of labour are assumed to achieve increased colony-level efficiency in task performance through functional specialisation of individuals into distinct castes. In social insects, ratios of individuals in different castes can adjust adaptively in response to external threats. However, whether flexibility in caste ratio also occurs in other social organisms with division of labour remains unclear. Some parasitic trematodes, in which clonal colonies within the snail intermediate host comprise a reproductive caste and a soldier caste, offer good systems to test the general nature of adaptive caste ratio adjustments. 2. Using the trematode Philophthalmus sp. as model, we test whether trematode colonies shift their composition toward more soldiers when exposed to a sustained risk of invasion by a competitor parasite species, and/or when experiencing sustained, active competition. We also quantify the colony-level fitness impact of caste ratio adjustments, measured as the colony's output of larval infective stages. 3. We conducted two long-term laboratory experiments on within-snail trematode colonies. First, snails harbouring Philophthalmus colonies were exposed to different levels of invasion risk by another trematode species, Maritrema novaezealandense. Second, the structure of Philophthalmus colonies was quantified after a year-long period of within-snail competition with the other trematode species. 4. When facing the risk of invasion by a competitor, independently of the level of risk, Philophthalmus colonies showed a significant shift toward producing more soldiers, resulting in altered caste ratio. Similarly, when experiencing actual competition by another trematode established in the same snail, Philophthalmus colonies also adjusted by producing significantly more soldiers. Greater investments in defense via more soldiers had negative impacts on the establishment and size of the competitor's colonies. Nevertheless, the presence of the competitor reduced the fitness (output of infective stages) of Philophthalmus colonies, although the production of more soldiers mitigated that effect. 5. Our findings demonstrate that trematode colonies with division of labour are capable of adaptive caste ratio adjustments in response to both the perceived threat of competition, and actual competition, with trade-offs against reproductive success only apparent when soldier numbers are very high. Combined with results on social insects, our study suggests parallel adaptations of colonial organisms in phylogenetically disparate organisms.
Data from: Sperm competitive ability evolves in response to experimental alteration of operational sex ratio
In naturally polygamous organisms such as Drosophila, sperm competitive ability is one of the most important components of male fitness and is expected to evolve in response to varying degrees of male–male competition. Several studies have documented the existence of ample genetic variation in sperm competitive ability of males. However, many experimental evolution studies have found sperm competitive ability to be unresponsive to selection. Even direct selection for increased sperm competitive ability has failed to yield any measurable changes. Here we report the evolution of sperm competitive ability (sperm defense-P1, offense-P2) in a set of replicate populations of Drosophila melanogaster subjected to altered levels of male–male competition (generated by varying the operational sex ratio) for 55–60 generations. Males from populations with female-biased operational sex ratio evolved reduced P1 and P2, without any measurable change in the male reproductive behavior. Males in the male-biased regime evolved increased P1, but there was no significant change in P2. Increase in P1 was associated with an increase in copulation duration, possibly indicating greater ejaculate investment by these males. This study is one of the few to provide empirical evidence for the evolution of sperm competitive ability of males under different levels of male–male competition.
Systemic Inflammation Response Index and C-Reactive Protein to Albumin Ratio in Acute Lymphoblastic Leukemia
ClinicalTrials.gov study NCT06674850. IPD Sharing: UNDECIDED. Countries: 0. Publications: 3.
Data from: Root:shoot ratio in developing seedlings: how seedlings change their allocation in response to seed mass and ambient nutrient supply
Open the record for dataset details and reuse information.
Data from: Caste ratio adjustments in response to perceived and realised competition in parasites with division of labour
Open the record for dataset details and reuse information.
Divergence of responses to variable socio-sexual environments in laboratory populations of Drosophila melanogaster evolving under altered operational sex-ratios
Open the record for dataset details and reuse information.
Data from: Multi-generational response to artificial selection for biased clutch sex ratios in Tigriopus californicus populations
Open the record for dataset details and reuse information.
Data from: Sperm competitive ability evolves in response to experimental alteration of operational sex ratio
Open the record for dataset details and reuse information.
Data from: Evolution of heterophil/lymphocyte ratios in response to ecological and life-history traits: a comparative analysis across the avian tree of life
Open the record for dataset details and reuse information.
Evaluation of the Cell Detachment Ratio on pH-responsive Chitosan as a Prognostic Factor in Lung Cancer
ClinicalTrials.gov study NCT04218188. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Comparing The Effect of Tadalafil 5 mg/Day to Sildenafil 25 mg/Day on Neutrophil-Lymphocyte and Platelet-Lymphocyte Ratios in Erectile Dysfunction Patients; and Comparison of Clinical Response
ClinicalTrials.gov study NCT05466695. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Mesenchymal CTC Ratio Dynamics Predicts Response and Survival in Pancreatic Ductal Adenocarcinoma With Neoadjuvant/Conversion Therapy
ClinicalTrials.gov study NCT07329920. IPD Sharing: NO. Countries: 1. Publications: 0.
The Ratio of Femoral Vein Diameter to Femoral Artery Diameter to Predict Fluid Responsiveness in Children
ClinicalTrials.gov study NCT05992246. IPD Sharing: NO. Countries: 1. Publications: 0.
Neutrophils to Lymphocytes Ratio in Predicting the Response to BCG in Non-muscle Invasive Bladder Cancer
ClinicalTrials.gov study NCT05946369. IPD Sharing: NO. Countries: 1. Publications: 0.
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.