The Role of Coloration in Mate Choice and Sexual
... A key prediction from honest signaling theory is that the expression of directionally selected sexual traits, such as sexual ornaments, should covary tightly with phenotypic condition. This is the phenomenon known as ‘‘condition-dependence’’ (Andersson, 1994; Johnstone, 1995; Rowe and Houle, 1996). ...
... A key prediction from honest signaling theory is that the expression of directionally selected sexual traits, such as sexual ornaments, should covary tightly with phenotypic condition. This is the phenomenon known as ‘‘condition-dependence’’ (Andersson, 1994; Johnstone, 1995; Rowe and Houle, 1996). ...
Female Polymorphism, Frequency Dependence, and Rapid
... (Robertson 1985; Cordero et al. 1998). It has been suggested that as male mimics, androchrome females suffer less from male mating harassment. Direct support for selection is equivocal; survival differences between morphs are either slight or absent (Cordero 1992; Cordero et al. 1998), and there is ...
... (Robertson 1985; Cordero et al. 1998). It has been suggested that as male mimics, androchrome females suffer less from male mating harassment. Direct support for selection is equivocal; survival differences between morphs are either slight or absent (Cordero 1992; Cordero et al. 1998), and there is ...
Necksforsex or competing browsers? A critique of ideas on the
... feeding height advantage. The finding that giraffe feed faster at shoulder level (2.5 m for females and 3.0 m for males) in East Africa (Young & Isbell, 1991), and spend more time doing so than at higher levels (Young & Isbell 1991; Ginnett & Demment, 1997) also suggests patchy advantages from elsewh ...
... feeding height advantage. The finding that giraffe feed faster at shoulder level (2.5 m for females and 3.0 m for males) in East Africa (Young & Isbell, 1991), and spend more time doing so than at higher levels (Young & Isbell 1991; Ginnett & Demment, 1997) also suggests patchy advantages from elsewh ...
Costs of sexual traits: a mismatch between theoretical
... models differ with respect to the importance of the costs of sexual traits. In Fisherian models, costs become important late when the exaggeration of the sexual trait is so large that natural selection prevents any further enlargement. In these models, the only requirement for costs is that they mus ...
... models differ with respect to the importance of the costs of sexual traits. In Fisherian models, costs become important late when the exaggeration of the sexual trait is so large that natural selection prevents any further enlargement. In these models, the only requirement for costs is that they mus ...
Sexually transmitted infections in polygamous mating systems
... replicating more realistic transmission pathways. This approach is particularly well suited to STIs, as transmission pathways are usually much more clearly defined (i.e. sexual contact) than for non-STIs. However, there are many problems associated with collecting data on real SCNs, including biases ...
... replicating more realistic transmission pathways. This approach is particularly well suited to STIs, as transmission pathways are usually much more clearly defined (i.e. sexual contact) than for non-STIs. However, there are many problems associated with collecting data on real SCNs, including biases ...
POPULATION GENETIC THEORY OF THE ASSORTATIVE MATING
... unselected males showed the high level of preference, while unselected females tested with males from the selected line showed the original low level of preference. The non-melanic phenotypes mate assortatively in the wild population at Keele: annulata X annulata and typica X typica matings occur mo ...
... unselected males showed the high level of preference, while unselected females tested with males from the selected line showed the original low level of preference. The non-melanic phenotypes mate assortatively in the wild population at Keele: annulata X annulata and typica X typica matings occur mo ...
Chapter Outline
... This chapter provides students with an overview of evolutionary approaches to personality. The authors begin by introducing the key concepts of evolution by natural selection and evolution by sexual selection. They then discuss the role of genes in the context of inclusive fitness theory, noting tha ...
... This chapter provides students with an overview of evolutionary approaches to personality. The authors begin by introducing the key concepts of evolution by natural selection and evolution by sexual selection. They then discuss the role of genes in the context of inclusive fitness theory, noting tha ...
Coevolution of male courtship and sexual conflict
... In poeciliid fishes, there is a mounting evidence that morphological traits in males and females experience SAC (Peden 1972a, 1972b; Constantz 1989; Langerhans 2011; Kwan et al. 2013). During copulation, males transfer sperm with the gonopodium, which is a modified anal fin. The length of gonopodia ...
... In poeciliid fishes, there is a mounting evidence that morphological traits in males and females experience SAC (Peden 1972a, 1972b; Constantz 1989; Langerhans 2011; Kwan et al. 2013). During copulation, males transfer sperm with the gonopodium, which is a modified anal fin. The length of gonopodia ...
Do exaggerated sexual swellings function in female mating
... To control for fundamental differences in the primate radiations, we restricted our analyses to catarrhine primates (see van Schaik et al., 2000). Identification of species that have exaggerated swellings was based on Nunn (1999a). This source used a three-part definition of exaggerated swellings: ( ...
... To control for fundamental differences in the primate radiations, we restricted our analyses to catarrhine primates (see van Schaik et al., 2000). Identification of species that have exaggerated swellings was based on Nunn (1999a). This source used a three-part definition of exaggerated swellings: ( ...
Adaptations to sexual selection and sexual conflict
... et al. 2007; Gay et al. 2009). This may mean that conflict has a role to play in reproductive isolation only under some conditions, that such experiments have not yet run over a sufficiently long period of evolutionary time or that not all relevant traits have been studied (see below for discussion ...
... et al. 2007; Gay et al. 2009). This may mean that conflict has a role to play in reproductive isolation only under some conditions, that such experiments have not yet run over a sufficiently long period of evolutionary time or that not all relevant traits have been studied (see below for discussion ...
On the Origin of Species by Natural and Sexual Selection
... of sexual selection involves preferences for arbitrary ornaments that reflect nothing but attractiveness (15). The runaway process could thus potentially evolve in different directions, allowing the divergence of preferences during speciation. However, mating preferences are generally not arbitrary ...
... of sexual selection involves preferences for arbitrary ornaments that reflect nothing but attractiveness (15). The runaway process could thus potentially evolve in different directions, allowing the divergence of preferences during speciation. However, mating preferences are generally not arbitrary ...
The Great Struggles of Life: Darwin and the Emergence of
... Sexual selection encompasses two component processes. The first centers on same-sex competition. If males compete, and the victors gain preferential sexual access to females, then evolution occurs because the victorious males reproduce more successfully and consequently pass on genes that contribut ...
... Sexual selection encompasses two component processes. The first centers on same-sex competition. If males compete, and the victors gain preferential sexual access to females, then evolution occurs because the victorious males reproduce more successfully and consequently pass on genes that contribut ...
correlated evolution of male and female morphologies in
... Water striders (Heteroptera: Gerridae) are a group of semiaquatic insects that has become a model system for testing various hypotheses about sexually antagonistic coevolution. A large number of experimental studies have demonstrated that there is intense and overt sexual conflict over mating rate, ...
... Water striders (Heteroptera: Gerridae) are a group of semiaquatic insects that has become a model system for testing various hypotheses about sexually antagonistic coevolution. A large number of experimental studies have demonstrated that there is intense and overt sexual conflict over mating rate, ...
Evolutionary mismatch of mating preferences and male colour
... assumptions. First, correlated evolution of male traits and female preferences within a population can only occur if there is sufficient genetic variation in both traits. Second, male traits and female preferences may correspond well only in populations that have reached evolutionary equilibrium for ...
... assumptions. First, correlated evolution of male traits and female preferences within a population can only occur if there is sufficient genetic variation in both traits. Second, male traits and female preferences may correspond well only in populations that have reached evolutionary equilibrium for ...
the evolutionary ecology of gynogenesis
... The inclusion of the complete sperm genome leads to triploid lineages (Schultz & Kallman 1968; Lamatsch et al. 2000a,b; Nanda et al. 1995). Fertile triploids have been reported from natural populations (Lamatsch et al. 2000a,b, but laboratory-produced triploids were sterile (Nanda et al. 1995, Schul ...
... The inclusion of the complete sperm genome leads to triploid lineages (Schultz & Kallman 1968; Lamatsch et al. 2000a,b; Nanda et al. 1995). Fertile triploids have been reported from natural populations (Lamatsch et al. 2000a,b, but laboratory-produced triploids were sterile (Nanda et al. 1995, Schul ...
Local adaptation and the evolution of female choice
... reliability of the male signal. However, when mutation rates were lower, such that directional selection from female choice could deplete genetic variation, GEIs coupled with dispersal created additional genetic variation that allowed female choice to persist in parameter spaces where it was otherwi ...
... reliability of the male signal. However, when mutation rates were lower, such that directional selection from female choice could deplete genetic variation, GEIs coupled with dispersal created additional genetic variation that allowed female choice to persist in parameter spaces where it was otherwi ...
Selection on male size, leg length and condition
... advantage because their lower metabolic requirements enable them to spend more of their time and energy searching for females and mating (Reiss 1989; Blanckenhorn et al. 1995; Blanckenhorn 2000). However, in species where adult males do not or only rarely feed, such as in orb-weaving spiders, large ...
... advantage because their lower metabolic requirements enable them to spend more of their time and energy searching for females and mating (Reiss 1989; Blanckenhorn et al. 1995; Blanckenhorn 2000). However, in species where adult males do not or only rarely feed, such as in orb-weaving spiders, large ...
Sensory exploitation and sexual conflict
... variation among males in the direct effects they have on female fitness. I will refer to this here as a Darwinian origin. This is a less problematic hypothesis than that suggested by Fisher (1930), since it does not rely on standing genetic variation in the breeding value for fitness among males. Fo ...
... variation among males in the direct effects they have on female fitness. I will refer to this here as a Darwinian origin. This is a less problematic hypothesis than that suggested by Fisher (1930), since it does not rely on standing genetic variation in the breeding value for fitness among males. Fo ...
Dragonfl ies and Damselfl ies
... hybridization is maladaptive, selection pressure causes a divergence in female mate preference and/or in male secondary sexual characters. It is often assumed that, ultimately, females are responsible for hybridization because they are the choosier sex and their co-operation is needed for successful ...
... hybridization is maladaptive, selection pressure causes a divergence in female mate preference and/or in male secondary sexual characters. It is often assumed that, ultimately, females are responsible for hybridization because they are the choosier sex and their co-operation is needed for successful ...
Sexual selection and the detection of ecological speciation
... mating traits on which they are based (Schluter and Price, 1993). For example, colonization of a new environment may lead to rapid changes in phenotypic traits (Kinnison and Hendry, 2001), some of which may be related to mate choice, but to slower changes in preference functions. Although this scena ...
... mating traits on which they are based (Schluter and Price, 1993). For example, colonization of a new environment may lead to rapid changes in phenotypic traits (Kinnison and Hendry, 2001), some of which may be related to mate choice, but to slower changes in preference functions. Although this scena ...
Does courtship behavior contribute to species
... AZ) running on the laptop to generate and play back speciestypical courtship song. Gryllus courtship songs have a series of quieter lower-frequency pulses (;5 kHz) followed by a single loud higher frequency pulse (;12 kHz peak) and a silent interval (Figure 1). I used previously recorded high and lo ...
... AZ) running on the laptop to generate and play back speciestypical courtship song. Gryllus courtship songs have a series of quieter lower-frequency pulses (;5 kHz) followed by a single loud higher frequency pulse (;12 kHz peak) and a silent interval (Figure 1). I used previously recorded high and lo ...
Courtship role reversal and deceptive signals in the
... exchange is then negotiated and copulation occurs on the wing. Males without nuptial gifts never enter female leks. Females return nightly to the lek to mate and feed while developing their eggs. The most curious aspect of female courtship in R. longicauda is that prior to lekking, females expand th ...
... exchange is then negotiated and copulation occurs on the wing. Males without nuptial gifts never enter female leks. Females return nightly to the lek to mate and feed while developing their eggs. The most curious aspect of female courtship in R. longicauda is that prior to lekking, females expand th ...
The mitonuclear compatibility hypothesis of sexual selection
... coloration of a cardinal evolve? Biologists now accept that the primary force for the evolution of many such display traits in male animals is the benefit of mate attraction [1–3]. There remains, however, the bigger question that has eluded solution for more than a century: why do females pay attent ...
... coloration of a cardinal evolve? Biologists now accept that the primary force for the evolution of many such display traits in male animals is the benefit of mate attraction [1–3]. There remains, however, the bigger question that has eluded solution for more than a century: why do females pay attent ...
Current Issues – Perspectives and Reviews
... Darwin’s recognition that male–male competition and female choice could favor the evolution of exaggerated male traits detrimental to survival set the stage for more than a century of theoretical and empirical work on sexual selection. While this Darwinian paradigm represents one of the most profoun ...
... Darwin’s recognition that male–male competition and female choice could favor the evolution of exaggerated male traits detrimental to survival set the stage for more than a century of theoretical and empirical work on sexual selection. While this Darwinian paradigm represents one of the most profoun ...
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.