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.
35
datasets available to search
ShareScore release 0.9.0
Dataset results
35 results for “oviparity”
Data and code for: Viviparous mothers impose stronger glucocorticoid‐mediated maternal stress effects on their offspring than oviparous mothers
<p><strong>Data and code accompanying the manuscript "Viviparous mothers impose stronger glucocorticoid‐mediated maternal stress effects on their offspring than oviparous mothers", MacLeod KJ, While GM, Uller, T, Ecology & Evolution 2021.</strong></p> <p>Code is in an R file - can be opened with any txt app.</p> <p>Metadata is in sheet 2 of the main data sheet (xlsx).</p> <p>Queries to kirstyjmacleod@gmail.com</p> <p><strong>Publication abstract</strong>: Maternal stress during gestation has the potential to affect offspring development via changes in maternal physiology, such as increases in circulating levels of glucocorticoid hormones that are typical after exposure to a stressor. While the effects of elevated maternal glucocorticoids on offspring phenotype (i.e., “glucocorticoid‐mediated maternal effects”) have been relatively well established in laboratory studies, it remains poorly understood how strong and consistent such effects are in natural populations. Using a meta‐analysis of studies of wild mammals, birds, and reptiles, we investigate the evidence for effects of elevated maternal glucocorticoids on offspring phenotype and investigate key moderators that might influence the strength and direction of these effects. In particular, we investigate the potential importance of reproductive mode (viviparity vs. oviparity). We show that glucocorticoid‐mediated maternal effects are stronger, and likely more deleterious, in mammals and viviparous squamate reptiles compared with birds, turtles, and oviparous squamates. No other moderators (timing and type of manipulation, age at offspring measurement, or type of trait measured) were significant predictors of the strength or direction of the phenotypic effects on offspring. These results provide evidence that the evolution of a prolonged physiological association between embryo and mother sets the stage for maladaptive, or adaptive, prenatal stress effects in vertebrates driven by glucocorticoid elevation.</p>
Fig. 1. N in Obtaining Oviparous Grass Snake, Natrix Natrix (Serpentes, Colubridae), Embryos At Early Developmental Stages By Caesarean Section
Fig. 1. N. natrix embryos at developmental stages A. 20. B. 22. C. 24. D. 25. E. 26. F. 27: av —auditory vesicle; cl —crystalline
Рис. 5–8. Stomaphis wojciechowskii и местообитание виΔа в БеΛаруси. 5 – место обнаружения коΛоний тΛи на Δубе черешчатом Quercus robur; 6 – кΛаΔка яиц поΔ корой (участок коры уΔаΛен); 7 – бескрыΛая живороΔящая самка, выΔеΛяющая капеΛьку меΔвяной паΔи; 8 – яйцекΛаΔущие самки с тоΛько что отΛоженными яйцами в гΛубокой трещине коры с хоΔами Lasius brunneus (верхний участок коры уΔаΛен). Figs 5–8. Stomaphis wojciechowskii and habitat in Belarus. 5 – habitat of the aphid colonies on Quercus robur; 6 – laying of eggs under oak bark (a section of bark was removed); 7 – apterous viviparous female, producing a drop of honeydew; 8 – oviparous females with newly-laid eggs in a crevice deep in bark and tunnels of Lasius brunneus (the upper section of bark was removed). in Stomaphis wojciechowskii Depa, 2012 (Hemiptera: Aphididae: Lachninae) - a new record of aphids in the fauna of Belarus
Рис. 5–8. Stomaphis wojciechowskii и местообитание виΔа в БеΛаруси. 5 – место обнаружения коΛоний тΛи на Δубе черешчатом Quercus robur; 6 – кΛаΔка яиц поΔ корой (участок коры уΔаΛен); 7 – бескрыΛая живороΔящая самка, выΔеΛяющая капеΛьку меΔвяной паΔи; 8 – яйцекΛаΔущие самки с тоΛько что отΛоженными яйцами в гΛубокой трещине коры с хоΔами Lasius brunneus (верхний участок коры уΔаΛен). Figs 5–8. Stomaphis wojciechowskii and habitat in Belarus. 5 – habitat of the aphid colonies on Quercus robur; 6 – laying of eggs under oak bark (a section of bark was removed); 7 – apterous viviparous female, producing a drop of honeydew; 8 – oviparous females with newly-laid eggs in a crevice deep in bark and tunnels of Lasius brunneus (the upper section of bark was removed).
Data from: Maternal provisioning interacts with incubation temperature to affect hatchling mercury exposure in an oviparous reptile
<p>The thermal environment experienced by developing embryos can influence the utilization of maternally-provisioned resources. Despite being particularly consequential for oviparous ectotherms, these dynamics are largely unexplored within ecotoxicological frameworks. Here, we test if incubation temperature interacts with maternally-transferred mercury to affect subsequent body burdens and tissue distributions of mercury in hatchling American alligators (<em>Alligator mississippiensis</em>). Nine clutches of alligator eggs were collected from a mercury-contaminated reservoir and incubated at either female- or male-promoting temperatures. Total mercury (THg) concentration was measured in egg yolk collected during incubation and in a suite of tissues collected from hatchlings. THg concentrations in residual yolk and blood were higher in hatchlings incubated at cooler, female-promoting temperatures compared to the warmer, male-promoting temperatures. THg concentrations in most tissues were positively correlated with THg concentrations in blood and dermis, and egg yolk THg concentration was the best predictor of THg concentration in many resultant tissues. Our results highlight a hereto unknown role of the developmental environment in mediating tissue specific uptake of contaminants in an oviparous reptile.</p>
FIGURE 4 in Oviparity, viviparity or plasticity in reproductive mode of the olm Proteus anguinus: an epic misunderstanding caused by prey regurgitation?
FIGURE 4 Proteus anguinus larva (captive-bred from Tular Cave Laboratory, photograph by Gregor Aljančič) and Salamandra salamandra larva in comparison. Both larvae are about 3 cm in size. Note the difference in size and shape of the head and trunk length, but similarities in presence of eyes and pigmentation. PHOTOGRAPH OF proteus anguinus LARVA BY GREGOR ALJANČIČ AND salamandra salamandra LARVA BY JAMES BURGON
FIGURE 3 in Oviparity, viviparity or plasticity in reproductive mode of the olm Proteus anguinus: an epic misunderstanding caused by prey regurgitation?
FIGURE 3 Scanning electron micrographs of the olm's teeth marks on regurgitated salamander (Salamandra salamandra) larvae. Heads of all larvae are facing towards the left. A) Teeth marks (arrowheads) on the dorsal side of the head corresponding to the position of the olm's jaw and B) parallel teeth marks on the left side of the head above the gills (g) of the larvae shown in fig. 2A. C) Teeth marks on the anterior edge of laceration above the left gills (g) and D) above the right eye (e) of the head of the larva shown in fig. 2B and C. (Scale bars represents 500 µm).
FIGURE 1 in Oviparity, viviparity or plasticity in reproductive mode of the olm Proteus anguinus: an epic misunderstanding caused by prey regurgitation?
FIGURE 1 Image of an olm (Proteus anguinus) regurgitating a fire salamander (Salamandra salamandra) larva. A) Image of an olm (22.5 cm of total length), moments before B) it started to regurgitate a salamander larva (3.1 cm of total length). C) shows a close-up of the salamander head and the larva fully regurgitated, with D) showing details of the still alive salamander larva.
Data from: Maternal provisioning interacts with incubation temperature to affect hatchling mercury exposure in an oviparous reptile
Open the record for dataset details and reuse information.
Dataset Mother-offspring conflict for water varies across altitude and is mitigated in the oviparous form of the bimodal lizard Zootoca vivipara
<p>The female dataset provides the responses of gravid and non reproductive female common lizard to a two week period of water restriction. This includes the measures of body mass (BM) and plasma osmolality (osmo) at the onset and the end of this timing. Dataset also reports different information on reproductive performance and characteristics of the population they came from. </p> <p>The juvenile dataset provides the morphological (snout-vent length: SVL, body mass: BM) and the sex of hatchling. We also included information about mother identity (cltuch effect), mother treatment and the characteristics of populations they came from. </p>
Recovered microbiome of an oviparous lizard differs across gut and reproductive tissues, cloacal swabs, and feces
<p>Microbial diversity and community function are related, and both can be highly specialized in different regions of the gut. The cloacal microbiome of Sceloporus virgatus lizards has low diversity, suggesting a specialized function, and is known to transfer antifungal microbes to eggshells during oviposition. We hypothesize that the cloacal microbiome is distinct from other parts of the digestive and reproductive systems. Here, we compare the microbiome of tissue samples from the cloaca, lower intestine, upper intestine, and oviduct. We further assessed whether common methods of microbial sampling – cloacal swabs and feces – provide accurate representations of these tissues, and whether feces might "seed" the cloacal microbiome. We found that the upper intestine and oviduct had unique microbial communities, while the lower intestine and cloaca had similar communities with lower diversity indicative of regional specialization. The cloacal community, in particular, showed extreme specialization averaging 99% Proteobacteria (Phylum) and 83% Enterobacteriacaea (Family). Cloacal swabs recovered communities similar to that of lower intestine and cloacal tissues, but fecal samples had much higher diversity and a distinct composition (62% Firmicutes and 39% Lachnospiraceae) relative to all gut regions. This result serves as a caution against the frequent assumption that fecal samples provide an accurate representation of the gut. Finally, we found that defecation did not alter the cloacal microbiome, suggesting that community is robust to perturbations from transient microbiota. </p>
Recovered microbiome of an oviparous lizard differs across gut and reproductive tissues, cloacal swabs, and feces
Open the record for dataset details and reuse information.
Flash drought and heat waves influence embryonic development and offspring size in an oviparous ectotherm
Open the record for dataset details and reuse information.
Data from: Latitudinal embryonic thermal tolerance and plasticity shape the vulnerability of oviparous species to climate change
Open the record for dataset details and reuse information.
FIGURES 1–10. Atopogyrodactylus praecipuus n. gen., n in Neotropical Monogenoidea. 63. Atopogyrodactylus praecipuus gen. et sp. n. (Gyrodactylidae), an oviparous gyrodactylid from the external surface of a bristlenose catfish Ancistrus sp. (Siluriformes: Loricariidae) from the Rondônian Amazon, Brazil
FIGURES 1–10. Atopogyrodactylus praecipuus n. gen., n. sp. from the external surface of a bristlenose catfish, Ancistrus sp. in Brazil. 1. Whole mount of adult, composite, ventral view. 2, 3. Accessory copulatory sclerites. 4. Terminal genitalia (male and female) of an immature specimen. 5. Whole mount of immature specimen (composite, ventral view). 6. Hook. 7. Egg. 8. Oviduct. 9. Anchor. 10. Haptor. Abbreviations: mco, male copulatory organ; as, accessory copulatory sclerite; vit, vitelline follicle; g, germarium; sv, seminal vesicle; ov, oviduct; c, cecum.
Data from: Experimental evidence of early costs of reproduction in conspecific viviparous and oviparous lizards
Reproduction entails costs, and disentangling the relative importance of each stage of the reproductive cycle may be important to assess the costs and benefits of different reproductive strategies. We studied the early costs of reproduction in oviparous and viviparous lizard females of the bimodal reproductive species Zootoca vivipara. Egg-retention time in oviparous females is approximately one third of the time in viviparous females. We compared the vitellogenesis and egg-retention stages which are common to both reproductive modes. Precisely, we monitored the thermoregulatory behaviour, the weight gain and the immunocompetence of the females. Moreover, we injected an antigen in half of the females (immune challenge) to study the trade-offs between reproductive mode and immune performance, and between different components of the immune system. Finally, we experimentally induced parturition in viviparous females at the time of egg-laying in oviparous females. Oviparous and viviparous females did not show strong differences in response to the immune challenge. However, viviparous females spent more time thermoregulating while partially hidden and gained more weight than oviparous females. The greater weight gain indicates that the initial period of egg-retention is less costly for viviparous than for oviparous females or that viviparous females are able to save and accumulate energy at this period. This energy may be used by viviparous females to cope with the subsequent costs of the last two thirds of the gestation. Such an ability to compensate the higher costs of a longer egg-retention period may account for the frequent evolution of viviparity in squamate reptiles.
Data from: Facultative oviparity in a viviparous skink (Saiphos equalis)
Facultative changes in parity mode (oviparity to viviparity, and vice versa) are rare in vertebrates, yet offer fascinating opportunities to investigate the role of reproductive lability in parity mode evolution. Here we report apparent facultative oviparity by a viviparous female of the bimodally reproductive skink Saiphos equalis- the first report of different parity modes within a vertebrate clutch. Eggs oviposited facultatively possess shell characteristics of both viviparous and oviparous S. equalis, demonstrating that egg coverings for viviparous embryos are produced by the same machinery as those for oviparous individuals. Since selection may act in either direction when viviparity has evolved recently, squamate reproductive lability may confer a selective advantage. We suggest that facultative oviparity is a viable reproductive strategy for S. equalis and that squamate reproductive lability is more evolutionarily significant than previously acknowledged.
Data from: Seasonal shifts along the oviparity-viviparity continuum in a cold-climate lizard population
Because squamate embryos require weeks of high temperature to complete development, cool climatic areas are dominated by viviparous taxa (in which gravid females can sun-bask to keep embryos warm) rather than oviparous taxa (which rely on warm soil to incubate their eggs). How, then, can some oviparous taxa reproduce successfully in cool climates – especially late in summer, when soil temperatures are falling? Near the northern limit of their distribution (in Sweden), sand lizards (Lacerta agilis) shift tactics seasonally, such that the eggs in late clutches complete development more quickly (when incubated at a standard temperature) than do those of early clutches. That acceleration is achieved by a reduction in egg size, and by an increase in the duration of uterine retention of eggs (especially, after cool weather). Our results clarify the ability of oviparous reptiles to reproduce successfully in cool climates, and suggest a novel advantage to reptilian viviparity in such conditions: by maintaining high body temperatures, viviparous females may escape the need to reduce offspring size in late-season litters.
Data from: Genetic and ecological data reveal species boundaries between viviparous and oviparous lizard lineages
Identification of cryptic species is an essential aim for conservation biologists to avoid premature extinctions of 'unrecognized' species. Integrating different types of data can undoubtedly aid in resolving the issue of species delimitation. We studied here two lineages of the common lizard Zootoca vivipara that display different reproductive mode (the viviparous Z. v. vivipara and the oviparous Z. v. carniolica) and that overlap their distributional ranges in the European Alps. With the purpose of delimiting species' boundaries, we analyzed their ecological, genetic and natural history features. More than 300 samples were collected and analyzed at cytochrome b and 11 microsatellites loci for investigating genetic variation, population structure, individual relatedness and evolutionary histories of the two lineages. Additionally, we compared their ecological niches using eight ecological variables. Genetic data showed contrasting patterns of genetic structure between the two lineages, different demographic dynamics and no hybridization events. Also strong ecological differences (such as temperature) emerged between the two lineages, and niche overlap was limited. Taken together, these results indicate that Z. v. vivipara and Z. v. carniolica should be recognized as two separate species, and particular conservation consideration should be given to the oviparous lineage that tends to live in areas threatened by increasing impact of human activities. However, recent and rapid climate warming might determine an increasing risk for the persistence of the viviparous lineage, being adapted to cold environments.
Climate change-induced shifts in survival and size of the worlds' northernmost oviparous snake: a 68-year study
<p>Because of their dependence on ambient temperature ectothermic animals can serve as sentinels of conservation problems related to global warming. Reptiles in temperate areas are especially well suited to study such effects, as their annual and daily activity patterns directly depend on ambient temperature. This study is based on annual data spanning 68 years from a fringe population of Grass Snakes (<em>Natrix natrix</em>), which is the world's northernmost oviparous (egg-laying) reptile, and known to be constrained by temperature for reproduction, morphology, and behavior. Mark-recapture analyses showed that survival probability was generally higher in males than in females and that it increased with body length. Body condition (scaled mass index) and body length increased over time, indicative of a longer annual activity period. Monthly survival was generally higher during winter (i.e., hibernation) than over the summer season. Summer survival increased over time, whilst winter survival decreased, especially during recent decades. Winter survival was lower when annual maximum snow depth was less than 15 cm, implying a negative effect of milder winters with less insulating snow cover. Our study demonstrates long-term shifts in body length, body condition and seasonal survival associated with a warming climate. Although the seasonal changes in survival ran in opposite directions and though changes were small in absolute terms, the trends did not cancel out, but total annual survival decreased. We conclude that effects of a warming climate can be diverse and pose a threat to thermophilic species in temperate regions and that future studies should consider survival change by season, preferably in a long-term approach.</p>
FIGURE 1 in Additions to the aphid fauna of Wrangel Island due to climate change with redescription of the oviparous female of Pterocomma groenlandicum Hille Ris Lambers, 1952 (Hemiptera, Aphidoidea)
FIGURE 1. Anomalies of mean July air temperature and total above-zero summer temperatures on Wrangel Island relative to the 1961–1990 means (data from a weather station in Rogers Bay).
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.