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122 results for “sexual maturation”
Figure 3 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 3. Seasonal patterns of mean gonadosomatic factor (GSI) values for small (LTǩ110 mm), medium (111ǩLTǩ180 mm) and large (LT>181 mm) length categories of male and female four-spotted megrim in the west Aegean Sea. Vertical bars denote standard errors of the means.
Figure 7 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 7. Seasonal patterns of mean stomach-somatic factor (SSI) values for small (LTǩ110 mm), medium (111ǩLTǩ180 mm) and large (LT>181 mm) length categories of male and female four-spotted megrim in the west Aegean Sea. Vertical bars denote standard errors of the means.
Figure 2 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 2. Seasonal patterns of mean condition factor (K) values for small (LTǩ110 mm), medium (111ǩLTǩ180 mm) and large (LT>181 mm) length categories of male and female four-spotted megrim in the west Aegean Sea. Vertical bars denote standard errors of the means.
Figure 5 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 5. Seasonal patterns of mean lipid content (%) values in the flesh of small (LTǩ110 mm), medium (111ǩLTǩ180 mm) and large (LT>181 mm) length categories of male and female four-spotted megrim in the west Aegean Sea. Vertical bars denote standard errors of the means.
Figure 4 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 4. Frequency of occurrence of the various maturity stages in male and female gonads of four-spotted megrim collected seasonally in the west Aegean Sea.
Figure 6 in Effects of sexual maturity and feeding on condition of a deep-sea flatfish, Lepidorhombus boscii, in north-eastern Mediterranean waters
Figure 6. Seasonal patterns of mean hepatosomatic factor (HSI) values for small (LTǩ110 mm), medium (111ǩLTǩ180 mm) and large (LT>181 mm) length categories of male and female four-spotted megrim in the west Aegean Sea. Vertical bars denote standard errors of the means.
Figure 2 in Geographical, climatic and biological constraints on age at sexual maturity in amphibians
Figure 2. Histograms depicting the age at sexual maturity distribution through the sampled species for females (left) and males (right).
Delayed color maturation of a sexual ornament in males of a damselfly: crypsis, female mimicry or both?
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Data from: Genomic signatures of fine‐scale local selection in Atlantic salmon suggest involvement of sexual maturation, energy homeostasis, and immune defence‐related genes
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Data from: Eversion and withdrawal of an intromittent organ before sexual maturation prepares male beetles for copulation
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Data from: Breeding system, shell size and age at sexual maturity affect sperm length in stylommatophoran gastropods
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Sexual maturity in Barn Owl (Tyto alba)
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Data from: Steroid hormones in hair reveal sexual maturity and competition in wild house mice (Mus musculus domesticus)
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Supplemental data from: Intraspecific facial bite marks in tyrannosaurids provide insight into sexual maturity and evolution of bird-like intersexual display
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Data from: Adaptive contraction of diet breadth affects sexual maturation and specific nutrient consumption in an extreme generalist omnivore
Animals balance their intake of specific nutrients, but little is known about how they do so when foraging in an environment with toxic resources and whether toxic foods promote adaptations that affect life history traits. In German cockroach (Blattella germanica) populations, glucose aversion has evolved in response to glucose-containing insecticidal baits. We restricted newly eclosed glucose averse (GA) and wild type (WT) female cockroaches to nutritionally defined diets varying in protein-to-carbohydrate (P:C) ratio (3:1, 1:1, or 1:3) or gave them free choice of the 3:1 and 1:3 diets, with either glucose or fructose as the sole carbohydrate source. We measured consumption of each diet over six days and then dissected the females to measure the length of basal oocytes in their ovaries. Our results showed significantly lower consumption by GA compared to WT cockroaches when restricted to glucose-containing diets, but also lower fructose intake by GA compared to WT cockroaches when restricted to high fructose diets or given choice of fructose-containing diets. Protein intake was regulated tightly regardless of carbohydrate intake, except by GA cockroaches restricted to glucose-containing diets. Oocyte growth was completely suppressed in GA females restricted to glucose-containing diets, but also significantly slower in GA than in WT females restricted to fructose-containing diets. Our findings suggest that GA cockroaches have adapted to reduced diet breadth through endocrine adjustments which reduce requirements for energetic fuels. Our study illustrates how an evolutionary change in the chemosensory system may affect the evolution of other traits that govern animal life histories.
Data from: Sexual selection shapes development and maturation rates in Drosophila
Explanations for the evolution of delayed maturity usually invoke trade-offs mediated by growth, but processes of reproductive maturation often continue long after growth has ceased. Here, we tested whether sexual selection shapes the rate of post-eclosion maturation in the fruit fly Drosophila melanogaster. We found that populations maintained for more than 100 generations under a short generation time and polygamous mating system evolved faster post-eclosion maturation and faster egg-to-adult development of males, when compared to populations kept under short generations and randomized monogamy that eliminated sexual selection. An independent assay demonstrated that more mature males have higher fitness under polygamy, but this advantage disappears under monogamy. In contrast, for females greater maturity was equally advantageous under polygamy and monogamy. Furthermore, monogamous populations evolved faster development and maturation of females relative to polygamous populations, with no detectable trade-offs with adult size or egg-to-adult survival. These results suggest that a major aspect of male maturation involves developing traits that increase success in sexual competition, whereas female maturation is not limited by investment in traits involved in mate choice or defense against male antagonism. Moreover, rates of juvenile development and adult maturation can readily evolve in opposite directions in the two sexes, possibly implicating polymorphisms with sexually antagonistic pleiotropy.
Data from: Nutrition during sexual maturation affects competitive ability but not reproductive productivity in burying beetles
1. Food availability can be unpredictable. When food becomes more abundant following a period of low food availability, developing larvae or juveniles often allocate resources preferentially towards increasing growth. This has important long-term effects on adult phenotypes and longevity. Despite the importance of strategic resource allocation during early development, few studies have examined how changes in resource availability during other windows of development affect reproductive strategies and fitness independent of growth. 2. We manipulated food availability in a burying beetle, Nicrophorus vespilloides, during a subadult period of sexual maturation when individuals cannot increase structural size but are still undergoing reproductive maturation. 3. In contrast to the trade-offs during larval or juvenile growth, beetles that experienced delayed feeding during reproductive maturation allocated resources preferentially towards maintaining both reproductive function and longevity. 4. In both sexes, delayed feeding beetles were much less successful in competition for carcasses. However, delayed feeding males and females provided similar amounts of parental care and did not differ in reproductive success or longevity. 5. These results indicate that the nutritional environment experienced during a key developmental window may be an important determinant of the expression of alternative reproductive strategies in adulthood, independent of body size.
8 9 Figures 6-9 in Growth, sexual maturity and sexual dimorphism of (Decapoda: Anomura: Aeglidae) in a tributary of the Ibicuí River in southern Brazil
8 9 Figures 6-9. Dispersion diagrams that analyse the morphological sexual maturity of Aegla georginae in Perau Creek, Ibicuí Basin, Brazil. (6-8) Males: (6) CLxMPL, n = 972; (7) CLxLPL, n = 951; (8) CLxHMQ, n = 915; (9) females, CLxAW, n = 976. Dark points = adults, Grey points = juveniles.
Figure 2 in Growth, sexual maturity and sexual dimorphism of (Decapoda: Anomura: Aeglidae) in a tributary of the Ibicuí River in southern Brazil
Figure 2. Absolute frequency distribution of cephalothoracic length (CL) (mm) classes of Aegla georginae males, Perau Creek, Ibicuí Basin, Brazil.
Figure 2 from: Williner V, Torres MV, Carvalho DA, König N (2014) Relative growth and morphological sexual maturity size of the freshwater crab Trichodactylus borellianus (Crustacea, Decapoda, Trichodactylidae) in the Middle Paraná River, Argentina. In: Wehrtmann IS, Bauer RT (Eds) Proceedings of the Summer Meeting of the Crustacean Society and the Latin American Association of Carcinology, Costa Rica, July 2013. ZooKeys 457: 159-170. https://doi.org/10.3897/zookeys.457.6821
Figure 2 - Segmented Relationship with breakpoint on male crabs of Trichodactylus borellianus. RChL: right cheliped length; RChH: right cheliped height; RChW: right cheliped width; PL: left pleopod length.
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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.