Female Orgasm from Intercourse - UNT Digital Library
... Previous research indicates that women prefer orgasms triggered by penilevaginal intercourse (PVI) as compared to those triggered by direct manual stimulation of the clitoris. However, for reasons that are not well understood, most women are unable to reach PVI orgasms as often as they desire. In ad ...
... Previous research indicates that women prefer orgasms triggered by penilevaginal intercourse (PVI) as compared to those triggered by direct manual stimulation of the clitoris. However, for reasons that are not well understood, most women are unable to reach PVI orgasms as often as they desire. In ad ...
Sexual selection in Fungi
... viz. the relative mating success. He expanded on this theory in ‘The Descent of Man’ (Darwin, 1871). Next to staying alive, an individual of an outcrossing sexually reproducing species needs to find a mating partner and successfully mate in order to reproduce. The traits that seem to be a burden mig ...
... viz. the relative mating success. He expanded on this theory in ‘The Descent of Man’ (Darwin, 1871). Next to staying alive, an individual of an outcrossing sexually reproducing species needs to find a mating partner and successfully mate in order to reproduce. The traits that seem to be a burden mig ...
PLoS ONE 7 - La Brea Tar Pits and Museum
... influence inferences of sexual dimorphism depending on sample size and from where the specimens were selected. Intraspecifc morphological diversity, if present, could be accounted for in terms of sexual dimorphism of morphological traits, not merely size. Analysing this would likely require greater ...
... influence inferences of sexual dimorphism depending on sample size and from where the specimens were selected. Intraspecifc morphological diversity, if present, could be accounted for in terms of sexual dimorphism of morphological traits, not merely size. Analysing this would likely require greater ...
Journal of Molluscan Studies
... Among dart-bearing species, dart shape is highly variable and species-specific. The most common form appears to be a sharp, conical, calcareous stylet that carries mucous products on its surface. The main characteristics possessed by darts, and the observed variation between species in these traits, ...
... Among dart-bearing species, dart shape is highly variable and species-specific. The most common form appears to be a sharp, conical, calcareous stylet that carries mucous products on its surface. The main characteristics possessed by darts, and the observed variation between species in these traits, ...
Convergent song preferences between female
... words: female choice, field crickets, Gryilus lineaticeps, Ormia, parasitoid, predation, sexual selection, tachinid flies. [Behav Ecol ...
... words: female choice, field crickets, Gryilus lineaticeps, Ormia, parasitoid, predation, sexual selection, tachinid flies. [Behav Ecol ...
View/Open - Digital Collections Home
... angles, and whether these differences are significant enough to provide a forensically relevant equation for estimating sex with the femur. Sexual dimorphism in pelvic dimensions and femoral angles of 30 males and 30 females were analyzed using landmarks on a 3D Cartesian coordinate system with geom ...
... angles, and whether these differences are significant enough to provide a forensically relevant equation for estimating sex with the femur. Sexual dimorphism in pelvic dimensions and femoral angles of 30 males and 30 females were analyzed using landmarks on a 3D Cartesian coordinate system with geom ...
THE LANDEKIRKPATRICK MECHANISM IS THE NULL MODEL OF
... explicit null model of intersexual selection as a pedagogical tool unifying the mathematical models of various intersexual selection mechanisms. Given genetic variation for a display trait and a mating preference, the most sexually advantageous trait value for any male to possess is the one that mat ...
... explicit null model of intersexual selection as a pedagogical tool unifying the mathematical models of various intersexual selection mechanisms. Given genetic variation for a display trait and a mating preference, the most sexually advantageous trait value for any male to possess is the one that mat ...
Sexual Imprinting and Evolutionary Processes in Birds: A
... allow a better, more detailed, discrimination between the bird’s own species and other ones than discrimination based on a mechanism not involving learning (Schutz, 1965,1971). According to this explanation, sexual imprinting would thus benefit that sex in a dimorphic species which has to discrimina ...
... allow a better, more detailed, discrimination between the bird’s own species and other ones than discrimination based on a mechanism not involving learning (Schutz, 1965,1971). According to this explanation, sexual imprinting would thus benefit that sex in a dimorphic species which has to discrimina ...
Parental investment, sexual selection and sex ratios
... historic contingencies. Specifically, unique features of a taxon’s natural history must alter the trade-off between key fitness components in at least one sex. In fish, for example, male parental care appears to involve fewer opportunity costs (lost matings) than is the case in other taxa. This is b ...
... historic contingencies. Specifically, unique features of a taxon’s natural history must alter the trade-off between key fitness components in at least one sex. In fish, for example, male parental care appears to involve fewer opportunity costs (lost matings) than is the case in other taxa. This is b ...
effects of natural and sexual selection on adaptive population
... Study Organism, Ecology and Study Populations Calopteryx splendens is a common damselfly along slow flowing streams in Europe (Askew 1988). It emerges as an adult from the larval stage in late May or early June in southern Sweden (Svensson et al. 2004). After reaching sexual maturity, males and fema ...
... Study Organism, Ecology and Study Populations Calopteryx splendens is a common damselfly along slow flowing streams in Europe (Askew 1988). It emerges as an adult from the larval stage in late May or early June in southern Sweden (Svensson et al. 2004). After reaching sexual maturity, males and fema ...
The effects of sexual selection and ecology on adaptation and
... huge amount of encouragement and laughter through the years, which made everything easier. Most importantly, I am incredibly thankful to my wife Rachel Mayberry for her steadfast support, interest, humour, and love that I could not have done without. ...
... huge amount of encouragement and laughter through the years, which made everything easier. Most importantly, I am incredibly thankful to my wife Rachel Mayberry for her steadfast support, interest, humour, and love that I could not have done without. ...
social selection, sexual selection and ecological competition
... compete with both males and females during the course of reproduction—often using ornaments, weapons and aggressive behaviours—but this competition may often target ecological and social resources, including foraging territories, nest sites and the quality of paternal care, rather than matings [8,9, ...
... compete with both males and females during the course of reproduction—often using ornaments, weapons and aggressive behaviours—but this competition may often target ecological and social resources, including foraging territories, nest sites and the quality of paternal care, rather than matings [8,9, ...
Let`s Face the Music and Dance - International Body Psychotherapy
... of the therapeutic relationship. This is essential when we are using touch. Without a more open dialogue, therapists risk creating both repression and re-enactment, to the detriment of the therapeutic encounter. This paper seeks to contribute to the dialogue that was initiated in Asheri’s UKCP confe ...
... of the therapeutic relationship. This is essential when we are using touch. Without a more open dialogue, therapists risk creating both repression and re-enactment, to the detriment of the therapeutic encounter. This paper seeks to contribute to the dialogue that was initiated in Asheri’s UKCP confe ...
Handicap principle implies emergence of dimorphic ornaments
... social potential function, antisymmetric about the population mean a. We use an antisymmetrized power law such that the shape depends on the social sensitivity g (blue dashed is g ¼ 0.5; maroon solid is g ¼ 1.5). (c) Example total reproductive potential function at equilibrium for g , 1. There are ...
... social potential function, antisymmetric about the population mean a. We use an antisymmetrized power law such that the shape depends on the social sensitivity g (blue dashed is g ¼ 0.5; maroon solid is g ¼ 1.5). (c) Example total reproductive potential function at equilibrium for g , 1. There are ...
Natural selection hampers divergence of reproductive traits in a
... can constrain sexual selection and thus hamper divergent evolution of reproductive traits across allopatric populations. Multivariate selection theory predicts that this would occur, for example, (i) if natural and sexual selection are antagonistic (i.e. different in sign) either for specific traits ...
... can constrain sexual selection and thus hamper divergent evolution of reproductive traits across allopatric populations. Multivariate selection theory predicts that this would occur, for example, (i) if natural and sexual selection are antagonistic (i.e. different in sign) either for specific traits ...
altruism, sexual selection and causes of male reproductive
... for mates occurs in African lions, Panthera leo; males form coalitions to compete for access to females and the victor(s) of such contests mate with pride females. Males that form coalitions probably benefit by improving their chances of winning aggressive contests with competitors (relative to fighti ...
... for mates occurs in African lions, Panthera leo; males form coalitions to compete for access to females and the victor(s) of such contests mate with pride females. Males that form coalitions probably benefit by improving their chances of winning aggressive contests with competitors (relative to fighti ...
Female competition and aggression - Philosophical Transactions of
... the context of sexual selection because they usually have lower potential reproductive rates than females (defined as the maximum number of independent offspring that can be produced per unit time) [81,82]. This means that at any given time fewer females than males will be ready to mate, and males w ...
... the context of sexual selection because they usually have lower potential reproductive rates than females (defined as the maximum number of independent offspring that can be produced per unit time) [81,82]. This means that at any given time fewer females than males will be ready to mate, and males w ...
Cooperating to compete: altruism, sexual selection
... for mates occurs in African lions, Panthera leo; males form coalitions to compete for access to females and the victor(s) of such contests mate with pride females. Males that form coalitions probably benefit by improving their chances of winning aggressive contests with competitors (relative to fighti ...
... for mates occurs in African lions, Panthera leo; males form coalitions to compete for access to females and the victor(s) of such contests mate with pride females. Males that form coalitions probably benefit by improving their chances of winning aggressive contests with competitors (relative to fighti ...
purging the genome with sexual selection: reducing
... genes, sexual conflict, the runaway process—may play a role in the evolution of secondary traits, the mechanisms by which preferences evolve do not directly determine the mutational consequences of sexual selection. Although we argue that in many cases the individuals with “good gene” may have highe ...
... genes, sexual conflict, the runaway process—may play a role in the evolution of secondary traits, the mechanisms by which preferences evolve do not directly determine the mutational consequences of sexual selection. Although we argue that in many cases the individuals with “good gene” may have highe ...
Ecology, sexual selection and speciation
... or sensory adaptation may affect the perception of sexual signals. Alternatively, non-random mating evolves in response to indirect selection. Here, preferences become genetically linked to traits that are subject to natural selection. For example, when adaptation-assortative mating preferences spre ...
... or sensory adaptation may affect the perception of sexual signals. Alternatively, non-random mating evolves in response to indirect selection. Here, preferences become genetically linked to traits that are subject to natural selection. For example, when adaptation-assortative mating preferences spre ...
Beyond the Pleistocene: Using Phylogeny and
... a variety of different sources of evolutionary constraint, such as physical laws that keep large organisms earthbound and force their actions to have equal and opposite reactions (i.e., formal constraint; see Gould, 1989a). The present review focuses primarily on historical or phylogenetic constrain ...
... a variety of different sources of evolutionary constraint, such as physical laws that keep large organisms earthbound and force their actions to have equal and opposite reactions (i.e., formal constraint; see Gould, 1989a). The present review focuses primarily on historical or phylogenetic constrain ...
Conditioning and Sexual Behavior: A Review
... important for finding a mate as well as eliciting sexual arousal (defined as increased genital blood flow) and sexual excitement (defined as heightened locomotor activity in anticipation of sexual contact). Other stimuli are derived from a potential mate and may lead to sexual arousal, elicit sexual ...
... important for finding a mate as well as eliciting sexual arousal (defined as increased genital blood flow) and sexual excitement (defined as heightened locomotor activity in anticipation of sexual contact). Other stimuli are derived from a potential mate and may lead to sexual arousal, elicit sexual ...
The use of multiple cues in mate choice
... and be maintained due to other selection pressures than selection for communication. For example, body constitution and running speed may be under survival selection but simultaneously be used as indicators of fitness. However, often the traits have been modified for communication, or serve a function ...
... and be maintained due to other selection pressures than selection for communication. For example, body constitution and running speed may be under survival selection but simultaneously be used as indicators of fitness. However, often the traits have been modified for communication, or serve a function ...
2D:4D
... The 2D:4D ratio refers to the length of one’s index finger (2D) with respect to the length of their ring (4D) finger. Fluctuating asymmetry (FA) refers to deviation from perfect bilateral symmetry caused by environmental stresses, developmental instability, and genetic problems during development. I ...
... The 2D:4D ratio refers to the length of one’s index finger (2D) with respect to the length of their ring (4D) finger. Fluctuating asymmetry (FA) refers to deviation from perfect bilateral symmetry caused by environmental stresses, developmental instability, and genetic problems during development. I ...
FEMALE MATE-CHOICE BEHAVIOR AND SYMPATRIC SPECIATION
... genetic model that incorporates the female choice behavior. We are interested in the degree of facilitation of sympatric speciation by various forms of mate choice, not in the various sources of selection and population dynamics that may produce and maintain two newly speciated populations in sympat ...
... genetic model that incorporates the female choice behavior. We are interested in the degree of facilitation of sympatric speciation by various forms of mate choice, not in the various sources of selection and population dynamics that may produce and maintain two newly speciated populations in sympat ...
Seduction
Seduction is the process of deliberately enticing a person, to lead astray, as from duty, rectitude, or the like; to corrupt, to persuade or induce to engage in sexual behaviour. The word seduction stems from Latin and means literally ""to lead astray"". As a result, the term may have a positive or negative connotation. Famous seducers from history or legend include Lilith, Giacomo Casanova and the fictional character Don Juan. Seduction as a phenomenon is not the subject of scientific interest, although similar, more specific terms like short-term mating, casual sex or mating strategies are used in evolutionary psychology. The Internet enabled the existence of a seduction community which is based on pseudoscientific discourse on seduction.Seduction, seen negatively, involves temptation and enticement, often sexual in nature, to lead someone astray into a behavioral choice they would not have made if they were not in a state of sexual arousal. Seen positively, seduction is a synonym for the act of charming someone — male or female — by an appeal to the senses, often with the goal of reducing unfounded fears and leading to their ""sexual emancipation"" Some sides in contemporary academic debate state that the morality of seduction depends on the long-term impacts on the individuals concerned, rather than the act itself, and may not necessarily carry the negative connotations expressed in dictionary definitions.