Coercive mating and gonopodium length in two populations
... gonopodia in males. (iii) Natural selection through predation by fish can counteract sexual selection and select for shorter gonopodia. Relatively large gonopodia have been shown to reduce the burst-swimming speed in G. affinis (LANGERHANS et al. 2005) imposing a direct cost on the character state f ...
... gonopodia in males. (iii) Natural selection through predation by fish can counteract sexual selection and select for shorter gonopodia. Relatively large gonopodia have been shown to reduce the burst-swimming speed in G. affinis (LANGERHANS et al. 2005) imposing a direct cost on the character state f ...
What is Play For? Sexual Selection and the Evolution of Play
... Parts of our physiology, such as wisdom teeth and the appendix, clearly are not adaptive and some are nice, but obviously did not evolve for certain present functions. Five digits on each hand are nice for touch typing and piano playing but certainly did not evolve for those activities. So, trying t ...
... Parts of our physiology, such as wisdom teeth and the appendix, clearly are not adaptive and some are nice, but obviously did not evolve for certain present functions. Five digits on each hand are nice for touch typing and piano playing but certainly did not evolve for those activities. So, trying t ...
Mate Choice, Sexual Conflict, and Evolution of Senescence
... Mating behavior may reduce mortality rates over evolutionary time, but it is not without costs. These costs may arise due to inherent conflicts of interest between the sexes. In mating contests between males and females, what is optimal for one sex may be suboptimal for the other sex. Consider sperm ...
... Mating behavior may reduce mortality rates over evolutionary time, but it is not without costs. These costs may arise due to inherent conflicts of interest between the sexes. In mating contests between males and females, what is optimal for one sex may be suboptimal for the other sex. Consider sperm ...
Experimental evolution reveals trade
... be that the magnitude of male investment in ejaculate provisions transferred to females is sufficient to alter the relative immune costs of reproduction incurred by males and females. While selection on male mating frequency is the most parsimonious explanation for the immunological changes observed ...
... be that the magnitude of male investment in ejaculate provisions transferred to females is sufficient to alter the relative immune costs of reproduction incurred by males and females. While selection on male mating frequency is the most parsimonious explanation for the immunological changes observed ...
Chapter 11: Sex and Evolution
... such species. In particular, which gender has more variable mating success? What basic asymmetry of life is responsible for this phenomenon and why? Answer: Males typically have more variable mating success than females. Females cannot increase their reproductive success by mating with many males be ...
... such species. In particular, which gender has more variable mating success? What basic asymmetry of life is responsible for this phenomenon and why? Answer: Males typically have more variable mating success than females. Females cannot increase their reproductive success by mating with many males be ...
Young adults attempt exchanges in reproductively relevant
... flowers. Females will mate with males in order to gain access to these rich territories, as it is more advantageous than scavenging in poorer areas (McKee, 1992). Market like trading of sexual activity has been observed among other primates. Gumert (2007) reports that male to female grooming in long ...
... flowers. Females will mate with males in order to gain access to these rich territories, as it is more advantageous than scavenging in poorer areas (McKee, 1992). Market like trading of sexual activity has been observed among other primates. Gumert (2007) reports that male to female grooming in long ...
The Dao of Sex: Zamperini Paper One Due: 3/14/2012 Pretty Boys
... An understanding of the meaningless superficiality of female beauty is critical in the enlightenment of those beautiful men destined for enlightenment. The notion that Vesperus was destined to a life on the carnal prayer mat—“Lone Peak also told me that since his words had failed to convince me, I ...
... An understanding of the meaningless superficiality of female beauty is critical in the enlightenment of those beautiful men destined for enlightenment. The notion that Vesperus was destined to a life on the carnal prayer mat—“Lone Peak also told me that since his words had failed to convince me, I ...
Bateman`s principles and human sex roles - synergy
... intense competition in one sex does not necessarily translate into choosiness in the other [11,26,27]. Individuals of either sex can both be discriminating in mate choice and can compete over access to mates. In addition, multiple factors have been predicted to affect the evolution of choosiness, co ...
... intense competition in one sex does not necessarily translate into choosiness in the other [11,26,27]. Individuals of either sex can both be discriminating in mate choice and can compete over access to mates. In addition, multiple factors have been predicted to affect the evolution of choosiness, co ...
Rapid evolutionary change in a sexual signal
... colonization and subsequent selection on signal evolution can shed light on the processes that contribute to reproductive isolation. When sexual signals do change, we want to understand not only the forces responsible (for example, adaptive or non-adaptive), but also the underlying genetic architect ...
... colonization and subsequent selection on signal evolution can shed light on the processes that contribute to reproductive isolation. When sexual signals do change, we want to understand not only the forces responsible (for example, adaptive or non-adaptive), but also the underlying genetic architect ...
Allee effect, sexual selection and demographic stochasticity
... system may dramatically increase effects of demographic stochasticity if a number of individuals refrain from reproduction because mates are unavailable in a monogamous mating system. However, the social mating system is far from the only component of sexual selection that can influence effects of d ...
... system may dramatically increase effects of demographic stochasticity if a number of individuals refrain from reproduction because mates are unavailable in a monogamous mating system. However, the social mating system is far from the only component of sexual selection that can influence effects of d ...
Sexual Conflict - Evolutionary Biology
... • occurs when: (i) adaptive allelic replacement at a locus that influences a male’s success in sexual selection also reduces the lifetime fecundity of females that interact with him, and (ii) there is counter-adaptation at a locus that influences a female’s lifetime fecundity, because it protects he ...
... • occurs when: (i) adaptive allelic replacement at a locus that influences a male’s success in sexual selection also reduces the lifetime fecundity of females that interact with him, and (ii) there is counter-adaptation at a locus that influences a female’s lifetime fecundity, because it protects he ...
biol2007 sex and sexual selection
... computer models suggest that an organism trained to recognize a particular shape may, after training, prefer an exaggerated version of that trait. For example, if a female recognizes her species by red colour, she may prefer a redder colour than present in the species, just because of the nature of ...
... computer models suggest that an organism trained to recognize a particular shape may, after training, prefer an exaggerated version of that trait. For example, if a female recognizes her species by red colour, she may prefer a redder colour than present in the species, just because of the nature of ...
Spontaneous male death and monogyny in the dark fishing spider
... redback spider, theoretical explorations into the evolution of monogyny do not find high search costs to be a necessary component [7]. Nonetheless, in order to determine whether high search costs may be a driving force in D. tenebrosus, we conducted field observation of released males. An astonishin ...
... redback spider, theoretical explorations into the evolution of monogyny do not find high search costs to be a necessary component [7]. Nonetheless, in order to determine whether high search costs may be a driving force in D. tenebrosus, we conducted field observation of released males. An astonishin ...
Sexual selection
... Darwin posited that sexual selection would come in either of two forms. In one form, usually known as intrasexual selection or male competition, sexual selection would come about as a result of fighting with other males for the chance to mate with a female. He attributed the ‘useless’ presence of ho ...
... Darwin posited that sexual selection would come in either of two forms. In one form, usually known as intrasexual selection or male competition, sexual selection would come about as a result of fighting with other males for the chance to mate with a female. He attributed the ‘useless’ presence of ho ...
Sexual Selection - Evolutionary Biology
... • ‘whilst in the other the struggle is likewise between the individuals of the same sex, in order to excite or charm those of the opposite sex, generally the females, which no longer remain passive, but select the more agreeable partners’ ...
... • ‘whilst in the other the struggle is likewise between the individuals of the same sex, in order to excite or charm those of the opposite sex, generally the females, which no longer remain passive, but select the more agreeable partners’ ...
Types of Sexual Selection
... Types of Sexual Selection Intrasexual selection – selection based on “___________-________ __________________” Intersexual selection – selection based on “__________________ _________________” Intra-sexual Selection – “Male-male Competition” ...
... Types of Sexual Selection Intrasexual selection – selection based on “___________-________ __________________” Intersexual selection – selection based on “__________________ _________________” Intra-sexual Selection – “Male-male Competition” ...
Fran first pp - WordPress.com
... Socio-biology therefore is a field of psychology which aims to explain social behaviour in evolutionary terms A behaviour is said to be adaptive if it leads to increased survival and reproduction of an organism. This means that the gene which causes this behaviour will be passed on to the next gener ...
... Socio-biology therefore is a field of psychology which aims to explain social behaviour in evolutionary terms A behaviour is said to be adaptive if it leads to increased survival and reproduction of an organism. This means that the gene which causes this behaviour will be passed on to the next gener ...
Sexual Selection Revisited — Towards a Gender- Neutral
... for example, marmoset dominant females inhibit subordinates’ reproduction through behaviour and hormones. In addition, female strategies are often not as obvious as males’, but sexual selection is not less important for them, as exemplified by the Hanuman langur females obscuring paternity through m ...
... for example, marmoset dominant females inhibit subordinates’ reproduction through behaviour and hormones. In addition, female strategies are often not as obvious as males’, but sexual selection is not less important for them, as exemplified by the Hanuman langur females obscuring paternity through m ...
Sexual Selection in Humans: An Evolutionary and Anthropological
... This assumes that all males had similar tastes in female "attractiveness", which acted as a selective force to help shape the female physiquel. Subsequently, this also supposes that females were dependent on males for support and that those who did not appeal to male sexual desires did not do well r ...
... This assumes that all males had similar tastes in female "attractiveness", which acted as a selective force to help shape the female physiquel. Subsequently, this also supposes that females were dependent on males for support and that those who did not appeal to male sexual desires did not do well r ...
Summary of - DrMillsLMU
... Some evidence indicates that weight scaled for height may provide a better measure of female attractiveness. In the remainder of the article, the authors consider some of the evidence concerning the evolution of physique and visual traits in the human male and ask whether sexual selection and female ...
... Some evidence indicates that weight scaled for height may provide a better measure of female attractiveness. In the remainder of the article, the authors consider some of the evidence concerning the evolution of physique and visual traits in the human male and ask whether sexual selection and female ...
Theorizing Sexual Harassment: Comment on Uggen and Blackstone
... space – then females were more likely to report them (32% vs. 18%). Females were also more likely to subjectively feel that the behaviors they reported constituted harassment (33% vs. 14%). But is there anything surprising in these results, since numerous studies (reviewed in Browne, 1997) have alre ...
... space – then females were more likely to report them (32% vs. 18%). Females were also more likely to subjectively feel that the behaviors they reported constituted harassment (33% vs. 14%). But is there anything surprising in these results, since numerous studies (reviewed in Browne, 1997) have alre ...
Document
... Evolution occurs when there are more or less faithful “replicators” (carried in vehicles) subject to selective pressures. The replicators can be memes rather than genes: An element of culture that can be passed on by imitation (Dawkins, 1976). There is competition by memes to be housed in our limite ...
... Evolution occurs when there are more or less faithful “replicators” (carried in vehicles) subject to selective pressures. The replicators can be memes rather than genes: An element of culture that can be passed on by imitation (Dawkins, 1976). There is competition by memes to be housed in our limite ...
Sexual Selection and Courtship Behavior in Insects
... appears that female birds in a state of nature, have by a long selection of the more attractive males, added to their beauty or other attractive qualities. No doubt this implies powers of discrimination and taste on the part of the female which will at first appear extremely improbable; but by the f ...
... appears that female birds in a state of nature, have by a long selection of the more attractive males, added to their beauty or other attractive qualities. No doubt this implies powers of discrimination and taste on the part of the female which will at first appear extremely improbable; but by the f ...
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.