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.
736
datasets available to search
ShareScore release 0.9.0
Dataset results
736 results for “species differentiation”
A plant virus differentially alters DNA methylation in two cryptic species of a hemipteran vector
<p>This study investigated DNA methylation patterns in two cryptic species (B and Q) of the sweet potato whitefly, <em>Bemisia tabaci</em> (Gennadius), following the acquisition of the tomato yellow curl virus, a single-stranded DNA virus. The methylation levels in genomic features such as promoters, gene bodies, and transposable elements in both cryptic species were described in this study. While overall trends were found to be similar, specific differences in methylation levels were observed. Virus-induced differentially methylated regions (DMRs) were associated with different genes in each cryptic species and were negatively correlated with differential gene expression. These DMRs were analyzed for changes in gene expression and alternative splicing, revealing clusters of hyper- and hypomethylated genes related to virus-vector interactions, immune functions, and detoxification processes. These methylation differences may help explain the distinct biological and physiological traits observed between the B and Q cryptic species.</p>
Beyond gene flow: (non)-parallelism of secondary contact in a pair of highly differentiated sibling species
<p>Replicated secondary contact zones can provide insights on the barriers to gene flow that are important during speciation and can reveal to which degree secondary contact may result in similar evolutionary outcomes. Here, we studied two secondary contact zones between highly differentiated Alpine butterflies<em> </em>of the genus <em>Erebia</em> using whole-genome re-sequencing data. We assessed the genomic relationships between populations and species and find hybridization to be rare, with no to little current or historical introgression in either contact zone. There are large similarities between the contact zones, consistent with an allopatric origin of interspecific differentiation, with no indications for ongoing reinforcing selection. Consistent with expected reduced effective population size, we further find that scaffolds related to the Z-chromosome show increased differentiation compared to the already high levels across the entire genome, which could also hint towards a contribution of the Z chromosome to species divergence in this system. Finally, we detected the presence of the endosymbiont <em>Wolbachia</em>, which can cause reproductive isolation between its hosts, in all <em>E. cassioides</em>, while it appears to be fully or largely absent in contact zone populations of <em>E. tyndarus</em>. We discuss how this rare pattern may have arisen and how it may have affected the dynamics of speciation upon secondary contact.</p>
Fig. 3 in Morphological Differentiation of the Skull in Two Closely-related Mustelid Species (Carnivora: Mustelidae)
Fig. 3. Projections specific (M. putorius and M. eversmanii) morphospace models on first two coordinates E1-E2 and K1-K2.
Fig. 2 in Morphological Differentiation of the Skull in Two Closely-related Mustelid Species (Carnivora: Mustelidae)
Fig. 2. NJ trees of skull measurements in M. putorius and M. eversmanii based on the absolute values of Spearman Rank Order Correlation coefficients from Tables 3-4.
Fig. 1 in Morphological Differentiation of the Skull in Two Closely-related Mustelid Species (Carnivora: Mustelidae)
Fig. 1. Two-species (M. putorius, M. eversmanii) morphospace models: (A) skull size morphospace based on NMDS axes E1, E2, and skull shape morphospace based on NMDS axes K1, K2; (B) three-dimensional joint 'size/shape' diversity morphospace based on principal components PC1-PC3.
Fig. 5 in Morphological Differentiation of the Skull in Two Closely-related Mustelid Species (Carnivora: Mustelidae)
Fig. 5. (A) Allometry of (CbL), the neurocranium length (NcL), the viscerocranium length (VcL) in M. putorius. (B-D) allometry of the postorbital width (PoW), width of auditory bulla (AbW) and the minimal palatal width (MpW) in M. putorius and M. eversmanii. First coordinate of the morphospaces (E1) is a general size factor of the skull.
Fig. 4 in Morphological Differentiation of the Skull in Two Closely-related Mustelid Species (Carnivora: Mustelidae)
Fig. 4. Scatterplots of PC1 vs. PC2 (A) and PC1 vs. PC3 (B) showing the relative positions of the European and steppe polecats and other mustelines species. (C) UPGMA dendrogram of morphological diversity macroparameters based on factor loadings from Table 6: ds, df - dimensionality of the morphospace models, Hs, Hf - entropy, Hds, Hdf - the average entropy, MOs, MOf - the measures of morphosystem organization; abbreviations s and f mark the macroparameters of 'size' diversity and 'shape' diversity of the skull correspondently.
Fig. 2 in Differentiation of Trichuris species using a morphometric approach
Fig. 2. Factor map corresponding to adult Trichuris sp. females derived from four different host primate species (Macaca sylvanus, Pan troglodytes, Colobus guereza kikuyensis, Papio ursinus) and the pig (Sus scrofa domestica) from zoos and abattoirs, respectively, in Spain. Samples are projected onto the first (PC1, 61%) and second (PC2, 35%) principal components. Each group is represented by its perimeter. Circles represent the centroid in each community.
Fig. 1 in Differentiation of Trichuris species using a morphometric approach
Fig. 1. Factor map corresponding to adult Trichuris sp. males derived from different host primate species (Macaca sylvanus, Pan troglodytes, Colobus guereza kikuyensis, Papio ursinus) and the pig (Sus scrofa domestica) from zoos and abattoirs, respectively, in Spain. Samples are projected onto the first (PC1, 64%) and second (PC2, 29%) principal components. Each group is represented by its perimeter. Circles represent the centroid in each community.
Fig. 4 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 4. The differences between the mean body length and the median value of body length for Pterostichus niger individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Fig. 6 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 6. The differences between the mean body length and the median value of body length for Carabus violaceus individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Fig. 5 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 5. The mean body length for Carabus violaceus individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Fig. 3 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 3. The mean body length for Pterostichus niger individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Fig. 2 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 2. The differences between the mean body length and the median value of body length for Carabus arcensis individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Fig. 1 in Body size differentiation in selected carabid species inhabiting Puszcza Piska forest stands disturbed by the hurricane
Fig. 1. The mean body length for Carabus arcensis individuals inhabiting post-hurricane (Pisz) and control (Maskulińskie) stands in years 2003-2007.
Figures 1-6. Lyela myops, males. 1, 3, 5, upperside. 2, 4, 6, underside. 1, 2, L. m in Distribution and geographical differentiation of the Central Asian endemic species Lyela myops (Staudinger, 1881) (Lepidoptera, Nymphalidae, Satyrinae)
Figures 1-6. Lyela myops, males. 1, 3, 5, upperside. 2, 4, 6, underside. 1, 2, L. m. tashkumirica, holotype, Kyrgyzstan, Jalal-Abad Region, near Tashkumir, 41.40°N, 72.24°E, 600 m, 3 May 1996, V.Lukhtanov leg., in ZISP. 3,4, L. m. myops, Kazakhstan, East Kazakhstan Region, Kurchum Range (SW extreme part), Arka-Aul Mts, 48.4311°N, 83.9792°E, 490m, 30 April 2019, V.A.Lukhtanov, in ZISP. 5,6, L. myops babatagi, Turkmenistan, Kugitang Mts, Svinzovy Rudnik, 1400 m, 28 April 1989, V.Lukhtanov leg., in ZISP.
Figure 13 in Distribution and geographical differentiation of the Central Asian endemic species Lyela myops (Staudinger, 1881) (Lepidoptera, Nymphalidae, Satyrinae)
Figure 13. Map of Kyrgyzstan showing the distribution of L. myops tashkumirica. Question marks indicate records whose subspecies identity need to be clarified.
Figures 7-12. Lyela myops, females. 7, 9, 11, upperside. 8, 10, 12, underside. 7, 8, L. m in Distribution and geographical differentiation of the Central Asian endemic species Lyela myops (Staudinger, 1881) (Lepidoptera, Nymphalidae, Satyrinae)
Figures 7-12. Lyela myops, females. 7, 9, 11, upperside. 8, 10, 12, underside. 7, 8, L. m. tashkumirica, paratype, Kyrgyzstan, Jalal-Abad Region, near Tashkumir, 41.40°N, 72.24°E, 600 m, 3 May 1996, V.Lukhtanov leg., in ZISP. 9, 10, L. m. myops, Kazakhstan, Jetisu Region (=Taldy-Kurgan Region), Koybyn Valley, 44.21449°N, 79.50230°E, 1048m, 30 April 2021, V.A.Lukhtanov leg., in ZISP. 11, 12, L. m. babatagi, Turkmenistan, Kugitang Mts, Svinzovy Rudnik, 1400 m, 28 April 1989, V.Lukhtanov leg., in ZISP.
Fig. 1 in Differentiation of Trichuris species eggs from non-human primates by geometric morphometric analysis
Fig. 1. Trichuris sp. eggs collected from the samples. A. Macaque (Macaca sylvanus) B. Colobus (Colobus guereza kikuyensis). C. Grivet (Chlorocebus aethiops. D. Brazza's monkey (Cercopithecus neglectus). The bar represents 20 μm.
Fig. 2 in Differentiation of Trichuris species eggs from non-human primates by geometric morphometric analysis
Fig. 2. Trichuris sp. egg lineal measurements. L1: maximum width of polar opercula, L2: minimum width of polar opercula, L3: base width of polar opercula, L4: length of polar opercula, measured from exterior midpoint to the narrow midpoint, L5: total length of polar opercula, measured from the exterior midpoint to the base midpoint, L6: wall thickness at its midpoint, L7: wall thickness in contact with polar opercula, L8: interior length of the egg.
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.