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.
83
datasets available to search
ShareScore release 0.9.0
Dataset results
83 results for “reproductive mode”
Fig. 6 in Evidence for cryptic diversity in the Neotropical water snake, Helicops angulatus (Linnaeus, 1758) (Dipsadidae, Hydropsini), with comments on its ecology, facultative reproductive mode, and conservation
Fig. 6. The lectotype of Natrix asper Wagler. Photos by Michael Franzen.
Fig. 7 in Evidence for cryptic diversity in the Neotropical water snake, Helicops angulatus (Linnaeus, 1758) (Dipsadidae, Hydropsini), with comments on its ecology, facultative reproductive mode, and conservation
Fig. 7. The holotype of Helicops fumigatus Cope, 1868. Photo by Ned Gilmore.
Fig. 4. NRM 17 in Evidence for cryptic diversity in the Neotropical water snake, Helicops angulatus (Linnaeus, 1758) (Dipsadidae, Hydropsini), with comments on its ecology, facultative reproductive mode, and conservation
Fig. 4. NRM 17, the holotype for Helicops angulatus. Photo courtesy of NRM.
Comparative Analysis of Maternal Gene Expression Patterns: Unraveling Evolutionary Signatures Across Reproductive Modes
<p>Dataset used to reproduce the analysis performed in "Comparative Analysis of Maternal Gene Expression Patterns: Unraveling Evolutionary Signatures Across Reproductive Modes" publication. The directory structure is the following:</p> <ul> <li>Gene_models - directory containing gene models (.gtf or .gff3 files) used for feature length comparisons across species</li> <li>intermediate_data - directory containing intermediate results from various scripts, the main purpose is to speed up the reproducibility of some longer running scripts <ul> <li>batch_adjusted_normalised_gene_expression_matrix.tsv - gene expression matrix used for evolutionary model fitting</li> <li>fc.tsv - fold change matrix used for evolutionary model fitting</li> <li>dated_species_tree.tre - species tree used throughout the model fitting step (newick format)</li> <li>DGE_script_enviorment.RData - saved R environment from differential gene expression analysis</li> <li>downregulated_IDs.RDS - gene IDs which undergo down-regulation throughout maternal-to-zygotic transition</li> <li>maternal_IDs.RDS - gene IDs which meet the cut-off criteria for being considered as maternally expressed</li> <li>N0_blasted.tsv - orthogroup annotations through blasting to a sequence database</li> <li>N0.tsv - orthogroups inferred from OrthoFinder</li> <li>OG_categories.tsv - classification of orthogroups based on them (I) having genes with maternal expression, but no significant down regulation, (II) having genes with maternal expression and significant down regulation throughout maternal-to-zygotic transition or (III) no maternal expression</li> <li>OG_presence.tsv - binary matrix coding for which orthogroup which species have gene expression values</li> <li>Paralog_variances.tsv - matrix containing variance metrics for paralogs in each species from before normalization across species</li> </ul> </li> <li>Pannzer2_annotation - directory containing GO annotations for all species from the Pannzer2 tool, used for GO analyses</li> <li>quantification_files - directory containing all salmon quantification outputs</li> <li>transcriptomes - <em>de novo</em> assembled transcriptomes for non-model species</li> </ul>
Data from: Comparative phylogeography, genetic differentiation, and contrasting reproductive modes in three fungal symbionts of a multipartite bark beetle symbiosis
Open the record for dataset details and reuse information.
Data from: Longevity, body dimension and reproductive mode drive differences in aquatic versus terrestrial life history strategies
Open the record for dataset details and reuse information.
Variation in body size and sexual size dimorphism in the most widely-ranging lizard: testing the effects of reproductive mode and climate
Open the record for dataset details and reuse information.
Genetic basis for the evolution of pelvic-fin brooding, a new mode of reproduction, in a Sulawesian fish
Open the record for dataset details and reuse information.
Data for: The correlated evolution of foraging mode and reproductive output in lizards
Open the record for dataset details and reuse information.
Data from: Gene function rather than reproductive mode drives the evolution of RNA helicases in sexual and apomictic Boechera
Open the record for dataset details and reuse information.
Data from: Humidity levels drive reproductive modes and phylogenetic diversity of amphibians in the Brazilian Atlantic Forest
AIM: The diversity of reproductive modes among amphibians provides a striking example of how differences in the biology of species furnish can provide important explanations for species distribution patterns on a broad scale. We hypothesized that sites with a higher humidity level will support more different modes of reproduction than drier sites and will consequently exhibit a higher phylogenetic diversity. Furthermore, we predict that if there is a gradient in the tolerance of reproductive modes to desiccation, there will be a nested pattern in the composition of reproductive modes among sites. LOCATION: Twenty-seven forest sites in the Brazilian Atlantic Forest. METHODS: Through a path analysis approach, we evaluated the direct and indirect effects of the humidity level on the number of reproductive modes as well as the relative importance of both variables on amphibian phylogenetic diversity. A nestedness analysis was used to quantify the extent to which the composition of both species and reproductive modes in drier sites correspond to non-random subsets of those in sites with higher annual precipitation. RESULTS: We found that the reproductive modes present in drier sites are non-random subsets of those present in sites with higher humidity levels. Because reproductive modes are phylogenetically conserved among amphibians, sites with a greater number of reproductive modes supported greater phylogenetic diversity. Sites with high precipitation throughout the year provided adequate environmental conditions for a larger number of reproductive modes, whereas sites with low precipitation and typical seasonal climates supported only those reproductive modes specialized to resist desiccation. MAIN CONCLUSIONS: Our results show that humidity-related variables are key environmental factors related to both the richness of reproductive modes and phylogenetic diversity. We hypothesized that the higher phylogenetic diversity found in moister sites reflects differences in the tolerance to desiccation among different reproductive modes. Given that reproductive modes are associated with susceptibility to desiccation, their incorporation into explanatory models may trigger a great advance in the understanding of the mechanisms regulating the species richness and composition of amphibian communities.
Data from: A treefrog with reproductive mode plasticity reveals a changing balance of selection for non-aquatic egg-laying
Non-aquatic reproduction has evolved repeatedly, but the factors that select for laying eggs on land are not well understood. The treefrog Dendropsophus ebraccatus has plasticity in reproductive mode, laying eggs that successfully develop in or out of water. This permits the first experimental comparison of the selective agents that shape adult oviposition behavior and embryo developmental capacity. I quantified the sources and strength of arboreal and aquatic egg mortality, how mortality varies with weather patterns, and assessed 39 years of daily rainfall patterns to infer historic levels of egg mortality and effects of climate change on the selective balance between aquatic and non-aquatic egg deposition. Aquatic predators and desiccation were the strongest selective agents in water and air, respectively. Egg mortality varied with weather such that aquatic oviposition was advantageous when rainfall was low, but laying eggs out of water increased survival when rainfall was high. Additionally, I found that since 1972 there have been significant changes in the patterns of rainfall in central Panama, which has altered the selective landscape acting on egg-laying behavior. This work provides insight into both the evolution and maintenance of adaptive phenotypic plasticity as well as historic and current selection on reproduction.
Data from: Genetic and morphological variation in sexual and asexual parasitoids of the genus Lysiphlebus: an apparent link between wing shape and reproductive mode
Background Endoparasitoids of aphids belonging to the genus Lysiphlebus Foerster (Hymenoptera: Braconidae: Aphidiinae) comprise over 20 species that exploit over a hundred species of aphid hosts including many important pest aphid species. Within the genus Lysiphlebus two genetically and morphologically well defined species groups are recognized: the "fabarum" and the "testaceipes" group both including taxa with sexual (arrhenotoky) and asexual (thelytoky) reproduction modes. However the diverse patterns of morphological variation which include clearly distinguishable morphotypes and genetic variation within species groups are not yet resolved. To address the relationship between morphological evolution and genetic divergence in Lysiphlebus wasps we explored both genetic differentiation (mitochondrial and nuclear gene sequences) and morphological variation (wing size and shape) and the changes in wing size and shape in the phylogenetic context. Results and Discussion Analyses of mitochondrial and nuclear gene sequences determine the separation of the genus into two species groups ("testaceipes" and "fabarum" groups) revealed three well defined phylogenetic lineages within "fabarum" species group including yet undefined species. Mapping wing shape data onto molecular phylogenetic indicated that the concordance between genetic diversification and divergence in the wing shape results from the deep split between two main species group. No association between pattern of genetic diversification morphotypes and wing shape variation within species groups was observed. The clear association between wing shape and reproductive mode was the most surprising result of our study. We propose two possible mutually non-exclusive mechanisms which may explain the link between reproductive mode and the shape of the wing Conclusions Combining molecular analysis with analysis of wing shape allows us determining existence of one cryptic yet undescribed species. At the same time we determine that Lysiphlebus fabarum group need detailed taxonomic revision because species boundaries as defined cannot be upheld. Mapping wing shape onto independently derived molecular phylogeny revealed that deep genetic divergence is associated with evolutionary changes in wing shape of Lysiphlebus wasps. Among most recently diverged taxa the morphological variation in the wing shape can be explained by the reproduction mode.
Data from: Effects of brooding and broadcasting reproductive modes on the population genetic structure of two Antarctic gastropod molluscs
Life-history characteristics exert a profound influence upon the population structure of many marine organisms. However, relatively few genetic studies have compared direct with indirect-developing species in the same ecosystem or geographic region, and none to our knowledge within an Antarctic setting. To address this issue we have collected novel Amplified Fragment Length Polymorphism (AFLP) data from the direct-developing top shell Margarella antarctica to form a comparison with previously published data for the broadcast-spawning Antarctic limpet Nacella concinna. We scored 270 loci in 240 M. antarctica individuals sampled from five populations spanning the full length of the Antarctic Peninsula. Profound differences were identified in the strength and pattern of population structure between the two species, consistent with gene flow being highly restricted in M. antarctica relative to N. concinna.
Data from: Effects of polyploidy and reproductive mode on life history trait expression
Ploidy elevation is increasingly recognized as a common and important source of genomic variation. Even so, the consequences and biological significance of polyploidy remain unclear, especially in animals. Here, our goal was to identify potential life history costs and benefits of polyploidy by conducting a large multiyear common garden experiment in Potamopyrgus antipodarum, a New Zealand freshwater snail that is a model system for the study of ploidy variation, sexual reproduction, host–parasite coevolution, and invasion ecology. Sexual diploid and asexual triploid and tetraploid P. antipodarum frequently coexist, allowing for powerful direct comparisons across ploidy levels and reproductive modes. Asexual reproduction and polyploidy are very often associated in animals, allowing us to also use these comparisons to address the maintenance of sex, itself one of the most important unresolved questions in evolutionary biology. Our study revealed that sexual diploid P. antipodarum grow and mature substantially more slowly than their asexual polyploid counterparts. We detected a strong negative correlation between the rate of growth and age at reproductive maturity, suggesting that the relatively early maturation of asexual polyploid P. antipodarum is driven by relatively rapid growth. The absence of evidence for life history differences between triploid and tetraploid asexuals indicates that ploidy elevation is unlikely to underlie the differences in trait values that we detected between sexual and asexual snails. Finally, we found that sexual P. antipodarum did not experience discernable phenotypic variance-related benefits of sex and were more likely to die before achieving reproductive maturity than the asexuals. Taken together, these results suggest that under benign conditions, polyploidy does not impose obvious life history costs in P. antipodarum and that sexual P. antipodarum persist despite substantial life history disadvantages relative to their asexual counterparts.
Fig. 7 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 7. Optimization of ultrastructural characters (characters 6 to 8, and 11 to 13) of the spermatozoa on a pruned phylogenetic hypothesis for Leptodactylidae. See list of characters and bibliographic sources in Table 3. Colors correspond to: gray, ambiguity; blue, state 0; red, state 1.
Fig. 8 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 8. Taxonomic distribution and optimization of 11 selected ultrastructural characters of the spermatozoa on the phylogenetic hypothesis of Leptodactylus proposed by de S´a et al. (2014) and subsequent modifications (see materials and methods section). Numbers refer to characters described in Results section.
Fig. 6 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 6. Optimization of reproductive modes and ultrastructural characters (characters 1 to 5) of the spermatozoa on a pruned phylogenetic hypothesis for Leptodactylidae (see section "Optimization" in Materials and Methods). See list of characters and bibliographic sources in Tables 1 and 3 Colors correspond to: gray, ambiguity; blue, state 0; red, state 1; green, state 2; orange, state 3; black, state 4.
Fig. 4 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 4. Transmission electron microscopy of spermatozoa of species of the Leptodactylus melanonotus group. A: L. melanonotus. LS of the acrosomal vesicle and nuclei (n). Note the long and thick acrosomal vesicle (av) and the reduced sub-acrosomal space (ss). B: L. validus. TS showing acrosomal vesicle (ac) and nuclei (n) at different levels. Note the thickness of the acrosomal vesicle and of the acrosomal space. The conical shape of the nucleus is observed in the different cross-sections. C: L. podicipinus. LS of the acrosomal complex-nuclei (n), with the organelle-free cytoplasmic region (black arrowhead) present. D. L. wagneri. LS of the posterior region of the nucleus (n), showing the asymmetrical nuclear fossa (nf) and the transverse striations (ts). E: L.validus. LS of the posterior nuclear region. Note the symmetrical fossa with the proximal (pc) and distal (dc) centrioles. F: L. wagneri. TS of the axoneme (a) and paraxonemal rod (pr) separated from the mitochondrial collar (mc) by the cytoplasmic canal (cc). G-H: L. wagneri, L. melanonotus. TSs of the tail showing the axoneme (a) associated to the juxtaxonemal fiber (jf), and the axial fiber (af) attached to the other components of the tail by the undulating membrane (o). I: L. leptodactyloides. Terminal region of the tail where the axoneme (a) is the only element of the tail. Scales bars: C, D, H, I = 0.5 µm; A, E-G = 0.2 µm; B = 1 µm.
Fig. 1. A-B in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 1. A-B: Schematic reconstruction of the morphology of the two types of spermatozoa observed in the genus Leptodactylus. Note that the main difference between the two morpho-types is the presence of the organelle-free cytoplasmic region between the acrosomal vesicle and the other end of the nucleus. Dashed lines indicate the cross-section represented on the right-hand side of the image.
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.