Results 51 to 60 of about 3,300,887 (297)

Interaction-Independent Sexual Selection and the Mechanisms of Sexual Selection [PDF]

open access: yesEvolution, 1998
Darwin identified explicitly two types of sexual selection, male contests (combat and displays) and female choice, and he devoted the overwhelming majority of his examples to traits that influence the outcome of these interactions. Subsequent treatments of sexual selection have emphasized the importance of intra- and intersexual interactions as sources
openaire   +2 more sources

Evolution of sexual size dimorphism in mammals: Sexual or natural selection? [PDF]

open access: yes, 2023
Sexual size dimorphism may have evolved through two processes: sexual or natural selection. The sexual selection theory states that males compete for mate monopolization and larger males can sire more offspring than smaller ones—factors that resulted in ...
Cassini, Marcelo Hernan
core   +1 more source

Sexual selection for males with beneficial mutations

open access: yesScientific Reports, 2022
Sexual selection is the process by which traits providing a mating advantage are favoured. Theoretical treatments of the evolution of sex by sexual selection propose that it operates by reducing the load of deleterious mutations.
Gilbert Roberts, Marion Petrie
doaj   +1 more source

Postcopulatory sexual selection [PDF]

open access: yesNature Reviews Genetics, 2002
The female reproductive tract is where competition between the sperm of different males takes place, aided and abetted by the female herself. Intense postcopulatory sexual selection fosters inter-sexual conflict and drives rapid evolutionary change to generate a startling diversity of morphological, behavioural and physiological adaptations.
Birkhead, T.R., Pizzari, T.
openaire   +4 more sources

Sex-biased dispersal, kin selection and the evolution of sexual conflict. [PDF]

open access: yes, 2015
This work was supported by Portuguese funds from Fundação para a Ciência e a Tecnologia through cE3c Unit FCT funding UID/BIA/00329/2013 and through SAMV Post-Doctoral Research Grant (SFRH/BPD/66042/2009), and by a Natural Environment Research Council ...
Varela, Susana   +2 more
core   +1 more source

The impact of COVID-19 on sexual health: a preliminary framework based on a qualitative study with clinical sexologists [PDF]

open access: yes, 2020
Introduction: In recent months, some attempts were made to understand the impact of COVID-19 on sexual health. Despite recent research that suggests COVID-19 and lockdown measures may eventually impact sexual response and sexually related behaviors, we ...
Ana Filipa Beato   +12 more
core   +1 more source

Intralocus sexual conflict diminishes the benefits of sexual selection. [PDF]

open access: yesPLoS Biology, 2006
Evolution based on the benefits of acquiring "good genes" in sexual selection is only plausible with the reliable transmission of genetic quality from one generation to the next.
Alison Pischedda, Adam K Chippindale
doaj   +1 more source

Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth [PDF]

open access: yes, 2013
Cordes N, Yiğit A, Engqvist L, Schmoll T. Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth. Ecology and Evolution.
Yiğit, Arzu   +7 more
core   +1 more source

REPEATED FREEZE-THAW CYCLES BUT NOT SHORT-TERM STORAGE OF FECAL EXTRACTS AT AMBIENT TEMPERATURE INFLUENCE THE STABILITY OF STEROID METABOLITE LEVELS IN CRESTED MACAQUES

open access: yesJurnal Kedokteran Hewan, 2017
The objective of this study was to examine the effects of repeated freeze-thaw cycles and short-term storage of fecal extracts at ambient temperature on the stability of fecal glucocorticoid (fGCM) and estrogen metabolite (fEM) levels from crested ...
Gholib Gholib   +5 more
doaj   +1 more source

Endless forms of sexual selection [PDF]

open access: yesPeerJ, 2019
In recent years, the field of sexual selection has exploded, with advances in theoretical and empirical research complementing each other in exciting ways.
Willow R. Lindsay   +15 more
doaj   +2 more sources

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