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Screening and characterization of sex-specific DNA fragments in the freshwater fish matrinch, Brycon amazonicus (Teleostei: Characiformes: Characidae)
(Springer, 2012-10-01)
The matrinch Brycon amazonicus, a commercially important freshwater fish resource, has no heteromorphic sex chromosomes so far described. In the present study, we performed a screening of sex-associated DNA markers in this ...
Sex-specific costs of rearing a nestling and its implications in the brood sex ratio of Magellanic penguins
(Springer, 2021-08)
In birds, possible explanations for a bias in brood sex ratio include differential cost of rearing nestlings of different sexes, and different parental fitness returns related to offspring sex. We studied brood sex ratio ...
MHM assay: molecular sexing based on the sex-specific methylation pattern of the MHM region in chickens
(SPRINGER, 2008)
Bird sex determination using molecular methods has proved to be a valuable tool in different studies. Although it is possible to sex most birds by coupling the CHD assay with others available methods, no sex-determining ...
Female-biased sex ratios in marine pelagic copepods: Response to Hirst et al. (2013)
(Oldendorf, 2013-12-12)
Hirst et al. (2013; Mar Ecol Prog Ser 489:297-298) suggest that Gusmão et al. (2013; Mar Ecol Prog Ser 482:279-298) misinterpreted the findings of Hirst et al. (2010; Limnol Oceanogr 55:2193-2206). They restate that the ...
Neo-sex chromosomes of Ronderosia bergi: insight into the evolution of sex chromosomes in grasshoppers
(Springer-Verlag Berlin Heidelberg, 2015)
Sex chromosomes have evolved many times from morphologically identical autosome pairs, most often presenting several recombination suppression events, followed by accumulation of repetitive DNA sequences. In Orthoptera, ...
Heteromorphic Sex Chromosomes and Their DNA Content in Fish: An Insight through Satellite DNA Accumulation in Megaleporinus elongatus
(Karger, 2020-04-01)
The repetitive DNA content of fish sex chromosomes provides valuable insights into specificities and patterns of their genetic sex determination systems. In this study, we revealed the genomic satellite DNA (satDNA) content ...
Sex and Sexual Behavior in Costa Rica and the United States
(2013)
This study examined differences between Costa Ricans and Euro-Americans in perceptions of appropriate sexual behavior and definitions of sex. When compared to Costa Ricans, Euro- Americans were more likely to consider ...
Population dynamics, relative growth and sex change of the protandric simultaneous hermaphrodite Exhippolysmata oplophoroides (Caridea: Lysmatidae) close to an upwelling area
(2018-06-01)
The present study investigated the population dynamics of Exhippolysmata oplophoroides in an area influenced by upwelling, focusing on reproductive period, sex ratio, growth rate, longevity, mortality, relative growth and ...
Neurogenin 3 mediates sex chromosome effects on the generation of sex differences in hypothalamic neuronal development.
(Frontiers in Cellular Neuroscience., 2014)
The organizational action of testosterone during critical periods of development is the cause of numer o ussex differences in the brain. However, sex differences in neuritogenesis have been detectedin primary neuronal ...
When Sex Work Becomes Your Everything: The Complex Linkages Between Economy and Affection Among Male Sex Workers in Peru
(SAGE Publications, 2014)
In Peru, there are few studies on male sex workers (MSWs), and existing studies explore limited subgroups or offer limited information about MSWs' perspectives. This study provides in-depth perspectives from 40 MSWs who ...