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170 results for “Male fertility”
The mating system affects the temperature sensitivity of male and female fertility
<p>1. To mitigate effects of climate change it is important to understand species' responses to increasing temperatures. This has often been done by studying survival or activity at temperature extremes. Before such extremes are reached, however, effects on fertility may already be apparent.</p> <p>2. Sex differences in the thermal sensitivity of fertility (TSF) could impact species persistence under climate warming because female fertility is typically more limiting to population growth than male fertility. However, little is known about sex differences in TSF.</p> <p>3. Here we first demonstrate that the mating system can strongly influence TSF using the seed beetle Callosobruchus maculatus. We exposed populations carrying artificially induced mutations to two generations of short-term experimental evolution under alternative mating systems, manipulating the opportunity for natural and sexual selection on the mutations. We then measured TSF in males and females subjected to juvenile or adult heat stress.</p> <p>4. Populations kept under natural and sexual selection had higher fitness, but similar TSF, compared to control populations kept under relaxed selection. However, females had higher TSF than males, and strikingly, this sex difference had increased over only two generations in populations evolving under sexual selection.</p> <p>5. We hypothesized that an increase in male-induced harm to females during mating had played a central role in driving this evolved sex difference, and indeed, remating under conditions limiting male harassment of females reduced both male and female TSF. Moreover, we show that manipulation of mating system parameters in C. maculatus generates intraspecific variation in the sex difference in TSF equal to that found among a diverse set of studies on insects.</p> <p>6. Our study provides a causal link between the mating system and TSF. Sexual conflict, (re)mating rates, and genetic responses to sexual selection differ among ecological settings, mating systems and species. Our study therefore also provides mechanistic understanding for the variability in previously reported TSFs which can inform future experimental assays and predictions of species responses to climate warming.</p>
Warfarin Effects on Male Fertility After Cardiac Surgery
ClinicalTrials.gov study NCT07330869. IPD Sharing: NO. Countries: 1. Publications: 10.
The Impact of a Nutritional Supplement (Impryl®) on Male Fertility
ClinicalTrials.gov study NCT03337360. IPD Sharing: NO. Countries: 1. Publications: 10.
Study of Sperm Molecular Factors Implicated in Male Fertility
ClinicalTrials.gov study NCT00481403. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Male Fertility Program
ClinicalTrials.gov study NCT01467869. IPD Sharing: NO. Countries: 1. Publications: 1.
Effect of Walnuts on Sperm Parameters and Male Fertility
ClinicalTrials.gov study NCT01954498. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effects of Lightweight Meshes in Laparoscopic Inguinal Hernia Repair on Quality of Life and Male Fertility Aspects
ClinicalTrials.gov study NCT00925067. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Male Fertility and Sperm Cryopreservation
ClinicalTrials.gov study NCT02431000. IPD Sharing: Not stated. Countries: 1. Publications: 9.
Inguinal Hernia Repair and Male Fertility
ClinicalTrials.gov study NCT05799742. IPD Sharing: YES. Countries: 1. Publications: 1.
Data from: Self-fertilization and the role of males in populations of tadpole shrimp (Branchiopoda: Notostraca: Triops)
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Data from: Low fertility of wild hybrid male flycatchers despite recent divergence
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Data from: Deciphering information encoded in birdsong: male songbirds with fertile mates respond most strongly to complex, low-amplitude songs used in courtship
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Data from: Not every sperm counts: male fertility in solitary bees, Osmia cornuta
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Data from: Architectural constraints, male fertility variation and biased floral morph ratios in tristylous populations
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The neonicotinoid thiamethoxam impairs male fertility in solitary bees, Osmia cornuta
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The mating system affects the temperature sensitivity of male and female fertility
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Female fertile phase synchrony, and male mating and reproductive skew, in the crested macaque
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Data from: Testing models of sex ratio evolution in a gynodioecious plant: female frequency covaries with the cost of male fertility restoration
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Data from: Nutritional geometry of mitochondrial genetic effects on male fertility
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Data from: A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success
A complete understanding of male reproductive success, and thus sexual selection, often requires an insight into male success in sperm competition. Genuine conclusions on male sperm competitiveness can only be made in real competitive situations. However, statistical analyses of sperm competitiveness from fertilization success data have been shown to be problematic. Here, I first outline a comprehensive general description of the different additive and non-additive elements relevant for the outcome of sperm competition staged between two males. Based on this description, I will highlight two main problems that are frequently encountered in experiments aiming at estimating sperm competitiveness. First, I focus on potential problems when using standardized competitors vs. random mating trials, because trials with standardized competitors do not allow generalization if male-male interactions are important. Second, I illustrate the necessity to analyse data on the logit scale rather than on raw proportions, because only the logit scale allows a clean separation of additive and non-additive effects (i.e. male×male- and female×male interactions).
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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.