Results 21 to 30 of about 410,908 (314)

No evidence of male-biased sexual selection in a snake with conventional Darwinian sex roles [PDF]

Royal Society Open Science, 2020
Decades of research on sexual selection have demonstrated that ‘conventional’ Darwinian sex roles are common in species with anisogamous gametes, with those species often exhibiting male-biased sexual selection. Yet, mating system characteristics such as
Brenna A. Levine, Gordon W. Schuett, Rulon W. Clark, Roger A. Repp, Hans-Werner Herrmann, Warren Booth   +5 more
doaj   +1 more source

UV Chromosomes and Haploid Sexual Systems [PDF]

Trends in Plant Science, 2018
The evolution of sex determination continues to pose major questions in biology. Sex-determination mechanisms control reproductive cell differentiation and development of sexual characteristics in all organisms, from algae to animals and plants. While the underlying processes defining sex (meiosis and recombination) are conserved, sex-determination ...
Coelho, Susana, Gueno, Josselin, Lipinska, Agnieszka, Cock, Jeremy, Umen, James   +4 more
openaire   +3 more sources

Evolution of Divergent Female Mating Preference in Response to Experimental Sexual Selection [PDF]

, 2014
Sexual selection is predicted to drive the coevolution of mating signals and preferences (mating traits) within populations, and could play a role in speciation if sexual isolation arises due to mating trait divergence between populations. However, few
Debelle, A., Snook, R.R., Snook, Rhonda R., Ritchie, Michael G., Debelle, Allan, Ritchie, M.G.   +5 more
core   +1 more source

Sexual Health and Dysfunction in Patients With Rheumatoid Arthritis:A Cross-sectional Single-Center Study [PDF]

, 2020
Introduction: An increased risk of sexual health problems is seen among patients with chronic illnesses. The background is likely to be multifactorial, but it remains poorly understood.
Bay, Laila Twisttmann, Ellingsen, Torkell; id_orcid, Nielsen, Dorthe S., Möller, Sören, Giraldi, Annamaria, Nielsen, Dorthe Susanne, Graugaard, Christian, Nielsen, Dorthe S.; id_orcid, Möller, Sören; id_orcid, Graugaard, Christian; id_orcid, Bay, Laila Twisttmann; id_orcid, Ellingsen, Torkell   +11 more
core   +1 more source

Age at Menarche, Schooling, and Sexual Debut in Northern Malawi [PDF]

, 2010
Background: Age at sexual debut is a key behavioural indicator used in HIV behavioural surveillance. Early age at menarche may precipitate early sex through perceived readiness for sex, or through school drop-out, but this is rarely studied.
Clare Tanton, Emmanuel Banda, Judith R. Glynn, French Neil, Banda, E, Glynn, Judith R., French, N, Neil French, Hemmings, Joanne, Glynn, Judith R, French, Neil, Glynn Judith R., Francis-Chizororo Monica, Banda, Emmanuel, Molesworth, Anna, Crampin, Amelia C, Monica Francis-Chizororo, Tanton, Clare, Kayuni, Ndoliwe, Judith R Glynn, Ndoliwe Kayuni, Floyd Sian, Amelia C Crampin, Amelia C. Crampin, Hemmings, J, Hemmings Joanne, Anna Molesworth, Banda Emmanuel, Sian Floyd, Francis-Chizororo, Monica, Crampin, Amelia C., Floyd, Sian, Tanton, C, Crampin Amelia C., Molesworth, A, Kayuni Ndoliwe, Tanton Clare, Molesworth Anna, Glynn, JR, Crampin, AC, Kayuni, N, Francis-Chizororo, M, Joanne Hemmings, Floyd, S   +43 more
core   +1 more source

“Sexuality” through the Kaleidoscope: Sexual Orientation, Identity, and Behaviour in Asylum Claims in the United Kingdom

Laws, 2021
The asylum system is a key site in which disputes over “sexuality” are contested. In refugee status determinations, administrative bodies are required to determine the actual or perceived sexuality of a claimant.
Alex Powell
doaj   +1 more source

Sexuality and associated risk factors in pregnant women [PDF]

Revista Brasileira de Enfermagem, 2020
Objectives: to assess the sexual function of pregnant women and the influence of sociodemographic, obstetric, and behavioral factors on sexual dysfunction.
Paula Renata Amorim Lessa Soares, Cinthia Gondim Pereira Calou, Samila Gomes Ribeiro, Priscila de Souza Aquino, Paulo Cesar de Almeida, Ana Karina Bezerra Pinheiro   +5 more
doaj   +3 more sources

The endogenous cannabinoid system modulates male sexual behavior expression

Frontiers in Behavioral Neuroscience, 2023
The endocannabinoid system (ECS) plays a key neuromodulatory role in the brain. Main features of endocannabinoids (eCBs) are that they are produced on demand, in response to enhanced neuronal activity, act as retrograde messengers, and participate in the
Gabriela Rodríguez-Manzo, Ana Canseco-Alba   +1 more
doaj   +1 more source

Metapopulation structure modulates sexual antagonism

Evolution Letters, 2021
Despite the far‐reaching evolutionary implications of sexual conflict, the effects of metapopulation structure, when populations are subdivided into several demes connected to some degree by migration, on sexual conflict dynamics are unknown.
E. Rodriguez‐Exposito, F. Garcia‐Gonzalez   +1 more
doaj   +1 more source

Compromised Sexual Health Among Male Patients With Implantable Cardioverter Defibrillator:A Cross-Sectional Questionnaire Study [PDF]

, 2019
Introduction: In cardiac patients with implantable cardioverter defibrillator (ICD), sexual function is sparsely described. Aim: To determine the prevalence and distribution of sexual dysfunction, and to describe whether primary or secondary prophylactic
Berg, Selina Kikkenborg, Giraldi, Annamaria, Zwisler, Ann-Dorthe, Svendsen, Jesper Hastrup, Rasmussen, Marianne Linnet, Zwisler, Ann Dorthe, Palm, Pernille   +6 more
core   +1 more source