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https://www.readbyqxmd.com/read/29760760/differences-in-the-reliance-on-cuticular-hydrocarbons-as-sexual-signaling-and-species-discrimination-cues-in-parasitoid-wasps
#1
Jan Buellesbach, Sebastian G Vetter, Thomas Schmitt
Background: Cuticular hydrocarbons (CHC) have been documented to play crucial roles as species- and sex-specific cues in the chemical communication systems of a wide variety of insects. However, whether they are sufficient by themselves as the sole cue triggering sexual behavior as well as preference of con- over heterospecific mating partners is rarely assessed. We conducted behavioral assays in three representative species of parasitoid wasps (Hymenoptera: Pteromalidae) to determine their reliance on CHC as species-specific sexual signaling cues...
2018: Frontiers in Zoology
https://www.readbyqxmd.com/read/29756617/is-it-possible-to-define-the-ideal-lips
#2
M Kar, N B Muluk, S A Bafaqeeh, C Cingi
The lips are an essential component of the symmetry and aesthetics of the face. Cosmetic surgery to modify the lips has recently gained in popularity, but the results are in some cases disasterous. In this review, we describe the features of the ideal lips for an individual's face. The features of the ideal lips with respect to facial anatomy, important anatomical landmarks of the face, the facial proportions of the lips and ethnic and sexual differences are described. The projection and relative sizes of the upper and lower lips are as significant to lip aesthetics as the proportion of the lips to the rest of the facial structure...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29749026/molecular-identification-of-cultivable-bacteria-in-the-gut-of-adult-bactrocera-tau-walker-and-their-trapping-effect
#3
Mijuan Luo, Hehe Zhang, Yinggang Du, Atif Idrees, Longyan He, Jiahua Chen, Qing E Ji
BACKGROUND: It has been shown that some bacteria can attract their hosts. Our research aimed to identify cultivable bacterial isolates in the guts of sexually mature adult female and male Bactrocera tau and to evaluate their utility in trapping of B. tau. RESULTS: Forty-one strains of bacteria were isolated and identified from B. tau with morphological, physiological, biochemical and 16S rDNA analysis. The dominant bacterial genera shared by both females and males were Enterobacter, Providencia and Serratia...
May 11, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29746216/digital-ethnography-of-zoophilia-a-multinational-mixed-methods-study
#4
Damian Jacob Sendler, Michal Lew-Starowicz
INTRODUCTION: This study investigates people who have sex with animals (PSA) by describing their living situation, sexual activity, beliefs, and attitudes toward stigmatization. These data are highly applicable to the work of psychiatric and forensic professionals investigating paraphilias. METHODS: We apply mixed-methods approach, using qualitative and quantitative analyses. RESULTS: The findings come from anonymous forum postings of 953 participants; of which 345 agreed to complete a survey upon advertising the study...
May 10, 2018: Journal of Sex & Marital Therapy
https://www.readbyqxmd.com/read/29742204/brazilian-bioluminescent-beetles-reflections-on-catching-glimpses-of-light-in-the-atlantic-forest-and-cerrado
#5
Etelvino J H Bechara, Cassius V Stevani
Bioluminescence - visible and cold light emission by living organisms - is a worldwide phenomenon, reported in terrestrial and marine environments since ancient times. Light emission from microorganisms, fungi, plants and animals may have arisen as an evolutionary response against oxygen toxicity and was appropriated for sexual attraction, predation, aposematism, and camouflage. Light emission results from the oxidation of a substrate, luciferin, by molecular oxygen, catalyzed by a luciferase, producing oxyluciferin in the excited singlet state, which decays to the ground state by fluorescence emission...
2018: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29741980/sexual-orientation-group-differences-in-perceived-stress-and-depressive-symptoms-among-young-adults-in-the-united-states
#6
Evan A Krueger, Ilan H Meyer, Dawn M Upchurch
PURPOSE: Overall, sexual minorities have poorer mental health than heterosexual individuals, and stress is thought to underlie such disparities. However, sexual minorities include both those identifying as lesbian, gay, or bisexual (LGB) and many who do not (e.g., individuals identifying as mostly heterosexual, or as heterosexual but with discordant same-sex attractions or behaviors), and little is known about the mental health or stress experiences of non-LGB identified sexual minorities...
May 9, 2018: LGBT Health
https://www.readbyqxmd.com/read/29741472/qualitative-analysis-of-attitudes-towards-adult-child-sexual-activity-among-minor-attracted-persons
#7
Sharron A Spriggs, Lisa J Cohen, Ashley Valencia, Yaseen S Zimri, Igor I Galynker
This study uses qualitative methodology to explore narrative responses to a question regarding the harmful vs. beneficial effects of adult-child sex on children. Data was gathered from a survey of self-identified Minor Attracted Persons (MAPs). Two-hundred and sixty seven survey participants provided narrative responses. Results indicated a significant amount of variability in perceptions of harm and of mitigating or aggravating factors. Understanding the subjective perspectives of MAPs, the range of their attitudes, and the issues that they identify as pertinent is critically important for clinical efficacy in the treatment of pedophilia...
May 9, 2018: Journal of Sex & Marital Therapy
https://www.readbyqxmd.com/read/29735676/artificial-selection-reveals-sex-differences-in-the-genetic-basis-of-sexual-attractiveness
#8
Thomas P Gosden, Adam J Reddiex, Stephen F Chenoweth
Mutual mate choice occurs when males and females base mating decisions on shared traits. Despite increased awareness, the extent to which mutual choice drives phenotypic change remains poorly understood. When preferences in both sexes target the same traits, it is unclear how evolution will proceed and whether responses to sexual selection from male choice will match or oppose responses to female choice. Answering this question is challenging, as it requires understanding, genetic relationships between the traits targeted by choice, mating success, and, ultimately, fitness for both sexes...
May 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29733672/exploring-the-contribution-of-motivation-and-experience-in-the-postpubescent-own-gender-bias-in-face-recognition
#9
Peter J Hills, J Michael Pake, Jack R Dempsey, Michael B Lewis
The own-gender bias in face recognition has been hypothesized to be the result of extensive experience with own-gender faces, coupled with a motivation to process own-group faces more deeply than other-group faces. We test the effect of experience and motivation in four experiments employing standard old/new recognition paradigms. In Experiment 1, no own-gender recognition bias was observed following an attractiveness-rating encoding task regardless of school type (single- or mixed-sex). Experiment 2, which used a distinctiveness-rating encoding task, did find a significant own-gender bias for all groups of participants...
May 7, 2018: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/29729394/neural-correlates-of-gender-differences-in-distractibility-by-sexual-stimuli
#10
J Strahler, O Kruse, S Wehrum-Osinsky, T Klucken, R Stark
Attentional interference control is a prominent feature of human cognition. To what extent sexual stimuli attract attention and interfere with cognitive tasks has still little been studied. Our study aimed to identify associations between attentional interference, sexual arousal, trait sexual motivation, and neural activity to sexual distractors while accounting for gender differences. Therefore, the present study examined the neural correlates of attentional interference by arousing sexual distractors using functional magnetic resonance imaging (fMRI)...
May 2, 2018: NeuroImage
https://www.readbyqxmd.com/read/29726639/-value-of-non-sexual-penile-erection-for-penile-rehabilitation-in-men-with-erectile-dysfunction
#11
REVIEW
Bo-Dong Lü, Wen-Zhi Wang, Jun-Feng Yan, Gao-Yue Zhang
Erectile dysfunction (ED) is a common male disease. Some related studies show that the prevalence of ED is nearly 52% in men aged 40 to 70 years and is increasing among younger males. Hypoxia is now considered to be an independent risk factor for ED and the mechanisms of hypoxia inducing ED are varied and complicated. Recently, an idea in penile rehabilitation has attracted much attention, which aims at improving erectile function by increasing oxygen supply to the cavernosum and reducing tissue fibrosis and apoptosis...
August 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29708849/no-compelling-evidence-that-preferences-for-facial-masculinity-track-changes-in-women-s-hormonal-status
#12
Benedict C Jones, Amanda C Hahn, Claire I Fisher, Hongyi Wang, Michal Kandrik, Chengyang Han, Vanessa Fasolt, Danielle Morrison, Anthony J Lee, Iris J Holzleitner, Kieran J O'Shea, S Craig Roberts, Anthony C Little, Lisa M DeBruine
Although widely cited as strong evidence that sexual selection has shaped human facial-attractiveness judgments, findings suggesting that women's preferences for masculine characteristics in men's faces are related to women's hormonal status are equivocal and controversial. Consequently, we conducted the largest-ever longitudinal study of the hormonal correlates of women's preferences for facial masculinity ( N = 584). Analyses showed no compelling evidence that preferences for facial masculinity were related to changes in women's salivary steroid hormone levels...
April 1, 2018: Psychological Science
https://www.readbyqxmd.com/read/29689459/the-midwifery-services-framework-lessons-learned-from-the-initial-stages-of-implementation-in-six-countries
#13
Shantanu Garg, Nester T Moyo, Andrea Nove, Martha Bokosi
In 2015, the International Confederation of Midwives (ICM) launched the Midwifery Services Framework (MSF): an evidence-based tool to guide countries through the process of improving their sexual, reproductive, maternal and newborn health services through strengthening and developing the midwifery workforce. The MSF is aligned with key global architecture for sexual, reproductive, maternal and newborn health and human resources for health. This third in a series of three papers describes the experience of starting to implement the MSF in the first six countries that requested ICM support to adopt the tool, and the lessons learned during these early stages of implementation...
April 11, 2018: Midwifery
https://www.readbyqxmd.com/read/29681871/handgrip-strength-as-a-darwinian-fitness-indicator-in-men
#14
REVIEW
Andrew C Gallup, Bernhard Fink
Handgrip strength (HGS) is a robust measure of overall muscular strength and function, and has long been predictive of a multitude of health factors and physical outcomes for both men and women. The fact that HGS represents such a ubiquitous measure of health and vitality may reflect the significance of this trait during human evolution. This trait is also highly sexually dimorphic due to influences of androgenic hormones and fat-free body mass, suggesting that it has been further elaborated through sexual selection...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29677455/the-effects-of-gender-and-relationship-context-cues-on-responsive-sexual-desire-in-exclusively-and-predominantly-androphilic-women-and-gynephilic-men
#15
Amanda D Timmers, Samantha J Dawson, Meredith L Chivers
Sexual desire may be "responsive," emerging from sexual arousal to sexually competent cues. Cues that elicit sexual arousal and desire differ, however, by gender and direction of sexual attractions. Further, relationship context cues are thought to be important for responsive desire, but this has not been tested directly. The current study examined gynephilic men's (n = 27) and exclusively (n = 23) and predominantly (n = 17) androphilic women's dyadic and solitary responsive sexual desire, as well as genital and self-reported arousal, to audio narratives varying by gender (male, female) of the sexual partner and relationship context (stranger, friend, long-term relationship)...
April 20, 2018: Journal of Sex Research
https://www.readbyqxmd.com/read/29672665/evolutionary-and-functional-potential-of-ploidy-increase-within-individual-plants-somatic-ploidy-mapping-of-the-complex-labellum-of-sexually-deceptive-bee-orchids
#16
Richard M Bateman, Jessica J Guy, Paula J Rudall, Ilia J Leitch, Jaume Pellicer, Andrew R Leitch
Background and Aims: Recent tissue-level observations made indirectly via flow cytometry suggest that endoreplication (duplication of the nuclear genome within the nuclear envelope in the absence of subsequent cell division) is widespread within the plant kingdom. Here, we also directly observe ploidy variation among cells within individual petals, relating size of nucleus to cell micromorphology and (more speculatively) to function. Methods: We compared the labella (specialized pollinator-attracting petals) of two European orchid genera: Dactylorhiza has a known predisposition to organismal polyploidy, whereas Ophrys exhibits exceptionally complex epidermal patterning that aids pseudocopulatory pollination...
April 17, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29668878/population-structure-movement-patterns-and-frequency-of-multiple-matings-in-tenodera-sinensis-mantodea-mantidae
#17
Tyler Christensen, William D Brown
Models of the evolution of sexual cannibalism show that the frequency of male mating opportunities has significant impact on male choice and male risk aversion. In this study, we examined ecological components that should affect opportunities for multiple mating in wild populations of the Chinese mantid (Tenodera sinensis Saussure). While conducting mark-recapture studies of two field populations over the course of two seasons, along with Global Positioning System data on locations of individuals, we collected data on population densities, movement patterns, and individual ranges to estimate the overlap of adult males and female mantids...
April 14, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29661939/sexual-orientation-and-depressive-symptoms-in-adolescents
#18
Jeremy W Luk, Stephen E Gilman, Denise L Haynie, Bruce G Simons-Morton
OBJECTIVES: Sexual orientation disparities in adolescent depressive symptoms are well established, but reasons for these disparities are less well understood. We modeled sexual orientation disparities in depressive symptoms from late adolescence into young adulthood and evaluated family satisfaction, peer support, cyberbullying victimization, and unmet medical needs as potential mediators. METHODS: Data were from waves 2 to 6 of the NEXT Generation Health Study ( n = 2396), a population-based cohort of US adolescents...
April 16, 2018: Pediatrics
https://www.readbyqxmd.com/read/29659892/effect-of-physiological-state-on-female-melon-fly-diptera-tephritidae-attraction-to-host-and-food-odor-in-the-field
#19
Roger I Vargas, Jaime C Piñero, Neil W Miller
Foraging behavior of wild female melon fly, Bactrocera (Zeugodacus) cucurbitae Coquillett, a worldwide pest of economically important cucurbit crops, was examined through mark and recapture studies in both wild (Kona: dominated by the invasive weed ivy gourd, Coccinea grandis [L.] Voigt [Cucurbitaceae]), and cultivated (Kapoho: dominated by papaya, Carica papaya L. [Caricaceae] orchards) habitats on Hawaii Island. In particular, the extent to which wild melon flies and color-marked F2 females responded to cucumber odor and Solulys yeast hydrolysate laced with ammonium acetate (1%, wt/vol) according to sexual maturity stage and degree of protein hunger was documented...
April 12, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29658169/love-and-dating-patterns-for-same-and-both-gender-attracted-adolescents-across-europe
#20
András Költő, Honor Young, Lorraine Burke, Nathalie Moreau, Alina Cosma, Josefine Magnusson, Béat Windlin, Marta Reis, Elizabeth M Saewyc, Emmanuelle Godeau, Saoirse Nic Gabhainn
Sexual orientation is a multidimensional phenomenon, which includes identity, behavior, and attraction. The attraction component, however, is less studied than the other two. In this article, we present the development of a two-item measure to identify adolescents who prefer same- and both-gender partners for love and dating. The questions were administered to nationally representative samples of 15-year-old adolescents in eight European countries and regions participating in the Health Behaviour in School-aged Children (HBSC) cross-national study...
April 15, 2018: Journal of Research on Adolescence: the Official Journal of the Society for Research on Adolescence
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