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.
8
datasets available to search
ShareScore release 0.9.0
Dataset results
8 results for “Poecilia mexicana”
Data from: Unique evolutionary trajectories in repeated adaptation to hydrogen sulphide-toxic habitats of a neotropical fish (Poecilia mexicana)
Replicated ecological gradients are prime systems to study processes of molecular evolution underlying ecological divergence. Here, we investigated the repeated adaptation of the neotropical fish Poecilia mexicana to habitats containing toxic hydrogen sulphide (H2S) and compared two population pairs of sulphide-adapted and ancestral fish by sequencing population pools of >200 individuals (Pool-Seq). We inferred the evolutionary processes shaping divergence and tested the hypothesis of increase of parallelism from SNPs to molecular pathways. Coalescence analyses showed that the divergence occurred in the face of substantial bidirectional gene flow. Population divergence involved many short, widely dispersed regions across the genome. Analyses of allele frequency spectra suggest that differentiation at most loci was driven by divergent selection, followed by a selection-mediated reduction of gene flow. Reconstructing allelic state changes suggested that selection acted mainly upon de novo mutations in the sulphide-adapted populations. Using a corrected Jaccard index to quantify parallel evolution, we found a negligible proportion of statistically significant parallel evolution of Jcorr = 0.0032 at the level of SNPs, divergent genome regions (Jcorr = 0.0061) and genes therein (Jcorr = 0.0091). At the level of metabolic pathways, the overlap was Jcorr = 0.2545, indicating increasing parallelism with increasing level of biological integration. The majority of pathways contained positively selected genes in both sulphide populations. Hence, adaptation to sulphidic habitats necessitated adjustments throughout the genome. The largely unique evolutionary trajectories may be explained by a high proportion of de novo mutations driving the divergence. Our findings favour Gould's view that evolution is often the unrepeatable result of stochastic events with highly contingent effects.
Data from: Unique evolutionary trajectories in repeated adaptation to hydrogen sulphide-toxic habitats of a neotropical fish (Poecilia mexicana)
Open the record for dataset details and reuse information.
Figure 5 in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 5. – Poecilia mexicana haplotype network. Letter (A) next to locality refers to river drainages flowing into the Atlantic Ocean, and (P) refers to river drainages flowing into the Pacific Ocean.
Figure 1. – Invasive Poecilia mexicana. A in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 1. – Invasive Poecilia mexicana. A: Male, CICCAA 02354, 45.2 mm SL; B: Male, CICCAA 02354, 45.1 mm SL; C: Female, CICCAA 02354, 43.2 mm SL.
Figure 2. – Poecilia mexicana collection site. A in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 2. – Poecilia mexicana collection site. A: Shaded area; B: Open area in the Anil River estuary mangrove forest, São Luis municipality, Maranhão state, northeastern Brazil.
Figure 6 in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 6. – Poecilia mexicana, UFRJ 12091, 42.7 mm SL. a, Gonopodium tip, left lateral view. Abbreviations: p, gonopodial palp; 3, ray 3; 4a and 4p, anterior and posterior branches of ray 4; 5a and 5p, anterior and posterior branches of ray 5.
Figure 4 in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 4. – Bayesian Inference haplotype tree of short-fin mollies. Numbers are posterior probabilities, and inner premaxilla and dentary teeth characteristic of each species group are presented.
Figure 3 in Identification of the Mexican Molly, Poecilia mexicana (Cyprinodontiformes: Poeciliidae), introduced in Brazil through α-taxonomy and DNA barcoding
Figure 3. – Locality of P. mexicana invasive population (red dot).
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.