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247 results for “sexual reproduction”
Figure 5 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 5 - Morphology of the male reproductive system of P. tremulae: A young specimen B mature specimen; ag – accessory gland, tf – testicular follicles, vd – vas deferens.
Figure 4 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 4 - Morphological features of the male: A antenna with multiple secondary rhinaria B marginal plates and stigmal pores C siphunculus D genital apparatus with parameres and membranous aedeagus.
Figure 2 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 2 - Morphological features of the oviparous female: A antennal segment III with secondary rhinaria B hind tibia with numerous scent plaques C posterior part of the abdomen, with siphunculi, cauda and genital plate.
Figures 4-6 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figures 4-6 Pontoniamargarita: (4) male (small and whitish) and female (large and orange); (5) female (circled) in the mantle cavity of P.rugosa; (6) ovigerous female. Scale bar = 1 cm.
Figure 7 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figure 7 Relationship between Pontoniamargarita total body length (mm) and Pinnarugosa shell height (mm). Regressions for females and males were r = 0.32 (p = 0.08) and r = 0.18 (p = 0.46), respectively.
Figures 1-3 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figures 1-3 Morphometric measurements of Pinnarugosa. (1) Shell height; (2) shell length; (3) shell width.
Figure 2 in Intragonadal evaluation of sexual steroid hormones during three reproductive events in two species of Peromyscus (Rodentia: Cricetidae)
Figure 2. Production and biotransformation profiles in four selected SSH of the ∆4 pathway by reproductive event in two species of Peromyscus. Mean intraovarian concentrations of sexual steroid hormones ([SSH]: progesterone, P4; androstenedione, A, testosterone, T; estradiol, E2) were assessed in free-living, adult females of P. melanotis (A) and P. difficilis (B), during estrous cycle (PRO, proestrus; EST, estrus; MET, metestrus; DIE, diestrus), pregnancy (early gestation, G1; late gestation, G2), and overall lactation. Bars depict mean [SSH] and vertical whiskers the respective standard errors; arrows signal which [SSH] had significant differences with others; when more than one [SSH] was statistically different in ANOVA analyzes, horizontal lines were added and arrows below and above them signal the respective [SSH]; number of asterisks indicate degree of significance in p-values (see Methods, Results, and the ANOVA in Table S1): * = significant; ** = very significant; *** = extremely significant; the plus sign (+) shows an almost statistically significant instance. Note that scales of plots differ.
Figure 4 in Intragonadal evaluation of sexual steroid hormones during three reproductive events in two species of Peromyscus (Rodentia: Cricetidae)
Figure 4. Comparison of intraovarian contents of each steroid hormone in two Peromyscus species: (A) progesterone [P4], (B) Androstenedione [A], (C) Testosterone [T1], (D) Estradiol [E2]. Concentrations curves include a complete estrous cycle (CEC) and a successful estrous cycle (SEC; i.e., followed by pregnancy and lactation), in free-living, adult females of P. melanotis (open markers) and P. difficilis (closed markers). The arrow and asterisk signal the only interspecific significant difference. Symbology after Fig. 1.
Data from: Ageing via perception costs of reproduction magnifies sexual selection
Understanding what factors modulate sexual selection intensity is crucial to a wide variety of evolutionary processes. Recent studies show that perception of sex pheromones can severely impact male mortality when it is not followed by mating (perception costs of reproduction). Here, we examine the idea that this may magnify sexual selection by further decreasing the fitness of males with inherently low mating success, hence increasing the opportunity for sexual selection. We use mathematical modelling to show that even modest mortality perception costs can significantly increase variability in male reproductive success under a wide range of demographic conditions. We then conduct a series of assays suggesting that, in D. melanogaster, failure to reproduce early in life may, via perception costs of reproduction, significantly reduce the subsequent fitness of males (ca. 25%), due mostly to increased reproductive ageing. Altogether, our results strongly suggest that perception costs of reproduction can magnify sexual selection in a biologically significant way. Finally, we estimate that around 29% of available studies quantify sexual selection based on short-term fitness estimates that may fail to capture these effects (if they were present in their subject species), and suggest addressing the existence and impact of perception costs of reproduction across taxa should thus be a priority.
Data from: Light sensing by opsins and fungal ecology: NOP-1 modulates entry into sexual reproduction in response to environmental cues
Understanding the genetic basis of the switch from asexual to sexual lifestyles in response to sometimes rapid environmental changes is one of the major challenges in fungal ecology. Light appears to play a critical role in the asexual–sexual switch—but fungal genomes harbour diverse light sensors. Fungal opsins are homologous to bacterial green-light-sensory rhodopsins, and their organismal functions in fungi have not been well understood. Three of these opsin-like proteins were widely distributed across fungal genomes, but homologs of the Fusarium opsin-like protein CarO were present only in plant-associated fungi. Key amino acids, including potential retinal binding sites, functionally diverged on the phylogeny of opsins. This diversification of opsin-like proteins could be correlated with life history-associated differences among fungi in their expression and function during morphological development. In Neurospora crassa and related species, knockout of the opsin NOP-1 led to a phenotype in the regulation of the asexual–sexual switch, modulating response to both light and oxygen conditions. Sexual development commenced early in ∆nop-1 strains cultured in unsealed plates under constant blue and white light. Furthermore, comparative transcriptomics showed that the expression of nop-1 is light-dependent and that the ∆nop-1 strain abundantly expresses genes involved in oxidative stress response, genes enriched in NAD/NADP binding sites, genes with functions in proton transmembrane movement and catalase activity, and genes involved in the homeostasis of protons. Based on these observations, we contend that light and oxidative stress regulate the switch via light-responsive and ROS pathways in model fungus N. crassa and other fungi.
Fig. 8 in Sexual development and reproductive pattern of the Mutton hamlet, Alphestes afer (Teleostei: Epinephelidae): a dyandric, hermaphroditic reef fish
Fig. 8. Monthly distribution percentages of gonadal stages per females (n = 183), immature bisexual female (Fbi) (n = 1), transitionals (Tr) (n = 16) and males (n = 57) from Pernambuco coast.
Fig. 6 in Sexual development and reproductive pattern of the Mutton hamlet, Alphestes afer (Teleostei: Epinephelidae): a dyandric, hermaphroditic reef fish
Fig. 6. Size-frequency distribution of females and males of A. afer during the reproductive period of 2008 and 2009. (Males, n=33; Females, n=31).
Contrasting evolutionary patterns between sexual and asexual lineages in a genomic region linked to reproductive mode variation in the pea aphid
<p>SNP dataset and outputs from BayPass, Popoolation and npstat, together with the script used to plot these data in a submited article entitled "Contrasting evolutionary patterns between sexual and asexual lineages in a genomic region linked to reproductive mode variation in the pea aphid" by M. Rimbault, F. Legeai<sup>,</sup>J. Peccoud, L. Mieuzet, E. Call, P. Nouhaud, H. Defendini, F. Mahéo, W. Marande, N. Théron, D. Tagu, G. Le Trionnaire, J.-C. Simon, J. Jaquiéry<sup>.</sup></p>
Mitigating Adverse Sexual and Reproductive Health Outcomes Among Young Adolescents
ClinicalTrials.gov study NCT03669913. IPD Sharing: UNDECIDED. Countries: 0. Publications: 2.
Effects of Infertility and Assisted Reproductive Technology on Sexual Function and Behavior
ClinicalTrials.gov study NCT07376109. IPD Sharing: NO. Countries: 1. Publications: 0.
Effect of Peer Education on Reproductive Health and Safe Sexuality Knowledge
ClinicalTrials.gov study NCT07120919. IPD Sharing: NO. Countries: 1. Publications: 0.
Changes in Reproductive and Sexual Health in People With Early Onset Colorectal Cancer
ClinicalTrials.gov study NCT04812912. IPD Sharing: YES. Countries: 1. Publications: 0.
Data from: Divergent artificial selection for female reproductive investment has a sexually concordant effect on male reproductive success
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Data from: Size-selective harvesting fosters adaptations in mating behavior and reproductive allocation, affecting sexual selection in fish
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Data from: Daphnia invest in sexual reproduction when its relative costs are reduced
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Allen Brain Atlas
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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.