Results 1 to 10 of about 3,837 (260)

The role of vaccination and public awareness in forecasts of Mpox incidence in the United Kingdom [PDF]

open access: yesNature Communications, 2023
Beginning in May 2022, Mpox virus spread rapidly in high-income countries through close human-to-human contact primarily amongst communities of gay, bisexual and men who have sex with men (GBMSM).
Samuel P. C. Brand   +10 more
doaj   +2 more sources

Extreme Reversed Sexual Dichromatism in a Bird Without Sex Role Reversal [PDF]

open access: yesScience, 2005
Brilliant plumage is typical of male birds, reflecting differential enhancement of male traits when females are the limiting sex. Brighter females are thought to evolve exclusively in response to sex role reversal. The striking reversed plumage dichromatism of Eclectus roratus parrots does not fit this pattern.
Heinsohn, Robert   +2 more
openaire   +3 more sources

Sexual Conflict: The Battle of the Sexes Reversed [PDF]

open access: yesCurrent Biology, 2008
In most species one sex is more reluctant to mate than the other. Standard explanations invoking potential reproductive rates have shortcomings that are illustrated by a new study of eager female and reluctant male antelopes.
Kokko, Hanna, Jennions, Michael
openaire   +3 more sources

Fontes protéicas suplementadas com aminoácidos e minerais para a tilápia do Nilo durante a reversão sexual Protein sources supplemented with amino acids and minerals to Nile tilapia during sex reversal phase

open access: yesRevista Brasileira de Zootecnia, 2005
Objetivou-se, no presente experimento, comparar o efeito da origem da fonte protéica e da suplementação com lisina e metionina ou cálcio e fósforo para a tilápia do Nilo (Oreochromis niloticus), durante a reversão sexual.
Fábio Meurer   +4 more
doaj   +1 more source

Probing the floral developmental stages, bisexuality and sex reversions in castor (Ricinus communis L.)

open access: yesScientific Reports, 2021
Castor (Ricinus communis L) is an ideal model species for sex mechanism studies in monoecious angiosperms, due to wide variations in sex expression. Sex reversion to monoecy in pistillate lines, along with labile sex expression, negatively influences ...
Sujatha Thankeswaran Parvathy   +2 more
doaj   +1 more source

Reversed Sexual Conflict in a Promiscuous Antelope [PDF]

open access: yesCurrent Biology, 2007
A general tenet of sexual conflict theory is that males have higher optimum mating rates than do females and therefore should be more persistent when it comes to mating. However, in promiscuous species, females might benefit from high mating rates as a result of increased conception probability with favored males, whereas favored males benefit from ...
openaire   +2 more sources

Radioimmunoassay of rat leptin: sexual dimorphism reversed from humans [PDF]

open access: yesClinical Chemistry, 1998
AbstractAdipose tissue secretes leptin, which interacts with receptors in the hypothalamus. In rodent models of obesity, leptin increases metabolism and decreases food intake, which helps to maintain normal body composition. Accurate and precise methods to quantitate circulating leptin concentrations are needed for physiological studies.
Landt, Michael   +6 more
openaire   +4 more sources

Masculinização de larvas de tilápia do Nilo (Oreochromis niloticus L.) a partir de banhos de imersão com 17alfa-metiltestosterona Masculinization of larvae of Nile tilapia (Oreochromis niloticus L.) by immersion baths with alpha-methyltestosterone

open access: yesRevista Brasileira de Zootecnia, 2005
Determinaram-se os períodos ontogênicos de maior sensibilidade das larvas de tilápias do Nilo (Oreochromis niloticus) à masculinização, com 17 alfa-metiltestosterona (MT), a partir de banhos de imersão, contendo 2,0 mg MT.L-1, por 36 horas, em um ...
Robie Allan Bombardelli, Carmino Hayashi
doaj   +1 more source

Farinha de resíduos da filetagem de tilápias na alimentação de tilápia-do-nilo (Oreochromis niloticus) na fase de reversão sexual Effects of feeding tilapia filleting by-product meal for nile tilapia (Oreochromis niloticus L.) during the sexual reversion phase

open access: yesRevista Brasileira de Zootecnia, 2005
Este trabalho foi realizado com o objetivo de avaliar a inclusão da farinha de resíduos da indústria de filetagem de tilápias (FT) na alimentação da tilápia-do-nilo na fase de reversão sexual.
Wilson Rogério Boscolo   +5 more
doaj   +1 more source

Epigenetic modification and inheritance in sexual reversal of fish [PDF]

open access: yesGenome Research, 2014
Environmental sex determination (ESD) occurs in divergent, phylogenetically unrelated taxa, and in some species, co-occurs with genetic sex determination (GSD) mechanisms. Although epigenetic regulation in response to environmental effects has long been proposed to be associated with ESD, a systemic analysis on epigenetic regulation of ESD is still ...
Shao, Changwei   +17 more
openaire   +4 more sources

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