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Dataset results
18 results for “Sex reversed females”
Data from: Evolutionary divergence via sexual selection acting on females in a species with sex role reversal
<p>1. There is much evidence that sexual selection drives the evolutionary divergence of male sexual traits, but little is known of females.</p> <p>2. Comparisons between neutral genetic divergence (FST) and phenotypic divergence (PST) among populations can reveal evolutionary responses to selection.</p> <p>3. In the bushcricket <em>Kawanaphila nartee</em>, changes in floral food availability cause sex roles to shift from competitive females and choosy males to choosy females and competitive males midway through the breeding season. Males call to attract females, and female auditory spiracle size is under sexual selection. We ask whether selection on females can drive an evolutionary divergence in auditory spiracle size among populations.</p> <p>4. We sampled 188 individuals from nine geographic locations and analysed 9,478 neutral SNP loci and two phenotypic characters to estimate FST and PST, respectively.</p> <p>5. We found that PST for female auditory spiracle size far exceeded the global FST, suggesting that female auditory spiracle size is subject to strong directional selection. We relate differences in phenotypic traits to differences in geological and floristic characteristics among the sites.</p> <p>6. Our data suggest that variation in sexual selection driven by variation in the floristic community on which this species feeds may contribute to the strength of directional selection acting on female <em>K. nartee</em> among populations.</p> <p>7. Together, these findings indicate that divergence among populations can be driven by sexual selection acting on females, even when that selection is temporary and circumscribed.</p>
Sex-role-reversal and the Bateman gradient in coucals – females benefit from mating with multiple partners
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Data from: Evolutionary divergence via sexual selection acting on females in a species with sex role reversal
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Data from: Androgen-armoured amazons – reversed sex roles in coucals are associated with testosterone in females but not males
<p class="MsoNormal">In some species, sexual selection is stronger in females than males. In classically polyandrous birds, for instance, females compete for mating opportunities and males care for offspring. Sex steroids such as testosterone have been suggested to regulate the behaviours of 'role-reversed' females and males, but comparative studies did not find evidence for a role of testosterone in relation to sex roles. However, the large variability of hormone measurements across laboratories may prevent detecting subtle differences in hormone levels. To circumvent this caveat, I compared sex steroid concentrations of females and males of two closely related and cohabiting species with different mating systems, the classically polyandrous black coucal (<em>Centropus grillii</em>) and the monogamous white-browed coucal (<em>C. superciliosus</em>). Baseline and GnRH-induced testosterone concentrations were twice as high in female black coucals than female white-browed coucals, and the low pre-breeding progesterone concentrations of female black coucals were consistent with progesterone's modulatory role during agonistic interactions in this species. Baseline and GnRH-induced testosterone and progesterone concentrations did not differ between males of both species. This study provides first evidence that elevated testosterone is associated with sex-role reversed traits in females, whereas low levels of testosterone may not be necessary to facilitate sex-role reversal in males.</p>
Data from: Androgen-armoured amazons – reversed sex roles in coucals are associated with testosterone in females but not males
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Data from: Differential introgression of a female competitive trait in a hybrid zone between sex-role reversed species
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Data from: Female ornamentation and the fecundity trade-off in a sex-role reversed pipefish
Sexual ornaments found only in females are a rare occurrence in nature. One explanation for this is that female ornaments are costly to produce and maintain and, therefore, females must trade-off resources related to reproduction to promote ornament expression. Here, we investigate whether a trade-off exists between female ornamentation and fecundity in the sex-role reversed, wide-bodied pipefish, Stigmatopora nigra. We measured two components of the disk-shaped, ventral-striped female ornament, body width and stripe thickness. After controlling for the influence of body size, we found no evidence of a cost of belly width or stripe thickness on female fecundity. Rather, females that have larger ornaments have higher fecundity and thus accurately advertise their reproductive value to males without incurring a cost to fecundity. We also investigated the relationship between female body size and egg size and found that larger females suffered a slight decrease in egg size and fecundity, although this decrease was independent of female ornamentation. More broadly, considered in light of similar findings in other taxa, lack of an apparent fecundity cost of ornamentation in female pipefish underscores the need to revisit theoretical assumptions concerning the evolution of female ornamentation.
Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal.
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Data from: Starvation causes female to male sex reversal through lipid metabolism in the teleost fish, medaka (Oryzias latipes)
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Data from: Female ornamentation and the fecundity trade-off in a sex-role reversed pipefish
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Data from: Sexual selection on female ornaments in the sex-role-reversed Gulf pipefish (Syngnathus scovelli)
Understanding how selection acts on traits individually and in combination is an important step in deciphering the mechanisms driving evolutionary change, but for most species, and especially those in which sexual selection acts more strongly on females than on males, we have no estimates of selection coefficients pertaining to the multivariate sexually selected phenotype. Here, we use a laboratory-based mesocosm experiment to quantify pre- and post-mating selection on female secondary sexual traits in the Gulf pipefish (Syngnathus scovelli), a sexually dimorphic, sex-role-reversed species in which ornamented females compete for access to choosy males. We calculate selection differentials and gradients on female traits, including ornament area, ornament number and body size for three episodes of selection related to female reproductive success (number of mates, number of eggs transferred and number of surviving embryos). Selection is strong on both ornament area and ornament size, and the majority of selection occurs during the premating episode of selection. Interestingly, selection on female body size, which has been detected in previous studies of Gulf pipefish, appears to be indirect, as evidenced by a multivariate analysis of selection gradients. Our results show that sexual selection favours either many bands or larger bands in female Gulf pipefish.
Data from: Sexual selection on female ornaments in the sex-role-reversed Gulf pipefish (Syngnathus scovelli)
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Transcriptomic characterization of transcription activator-like effector nucleases-induced XY dmy- sex reversal female medaka (Oryzias latipes)
GEO Series GSE62700. Oryzias latipes. 3 samples. Type: Expression profiling by high throughput sequencing.
Expression data from hybrid female Xenopus sex reversal experiment
GEO Series GSE9504. Xenopus laevis x Xenopus muelleri; Xenopus laevis. 8 samples. Type: Expression profiling by array.
46,XY sex reversed females with complete androgen insensitivity syndrome
GEO Series GSE6797. Homo sapiens. 15 samples. Type: Expression profiling by array.
Complete male-to-female sex reversal in mice lacking the miR-17~92 cluster [scRNA-seq]
GEO Series GSE225676. Mus musculus. 4 samples. Type: Expression profiling by high throughput sequencing.
Complete male-to-female sex reversal in mice lacking the miR-17~92 cluster [RNA-seq]
GEO Series GSE225675. Mus musculus. 36 samples. Type: Expression profiling by high throughput sequencing.
Complete male-to-female sex reversal in mice lacking the miR-17~92 cluster
GEO Series GSE225677. Mus musculus. 40 samples. Type: Expression profiling by high throughput sequencing.
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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.
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DANDI Archive for NWB datasets
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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.