rhinoceros beetle Mechanical limits to maximum weapon size in a
... Division of Biological Sciences, University of Montana, Missoula, MT, USA The horns of giant rhinoceros beetles are a classic example of the elaborate morphologies that can result from sexual selection. Theory predicts that sexual traits will evolve to be increasingly exaggerated until survival cost ...
... Division of Biological Sciences, University of Montana, Missoula, MT, USA The horns of giant rhinoceros beetles are a classic example of the elaborate morphologies that can result from sexual selection. Theory predicts that sexual traits will evolve to be increasingly exaggerated until survival cost ...
The use of multiple cues in mate choice
... shaped by social interactions (McGraw & Hill, 2000). This difference in information content may be due to the fact that the nutrients required to maintain the two colours are different. Melanins are synthesised from amino acids that are basic dietary components and usually not a limiting resource (Fox ...
... shaped by social interactions (McGraw & Hill, 2000). This difference in information content may be due to the fact that the nutrients required to maintain the two colours are different. Melanins are synthesised from amino acids that are basic dietary components and usually not a limiting resource (Fox ...
Convergent song preferences between female
... chirp rates, longer chirp durations, and higher chirp amplitudes. In addition, both female crickets and female flies preferred male calling songs with higher chirp rates and longer chirp durations, even when these songs were of lower amplitude. These results suggest that sexual selection by female c ...
... chirp rates, longer chirp durations, and higher chirp amplitudes. In addition, both female crickets and female flies preferred male calling songs with higher chirp rates and longer chirp durations, even when these songs were of lower amplitude. These results suggest that sexual selection by female c ...
GENDER DIFFERENCES IN ATTITUDES AND BEHAVIORS
... virus (Surgeon General and the Centers for Disease Control, 1986), this pandemic can no longer be characterized as a disease unique to homosexuals, drug addicts, victims of blood transfusions and adults. "By the end of 1991, an estimated 270,000 cases of AIDS will have occurred with 179,000 deaths w ...
... virus (Surgeon General and the Centers for Disease Control, 1986), this pandemic can no longer be characterized as a disease unique to homosexuals, drug addicts, victims of blood transfusions and adults. "By the end of 1991, an estimated 270,000 cases of AIDS will have occurred with 179,000 deaths w ...
Evolution`s Rainbow
... I increasingly wondered why we didn’t already know about nature’s wonderful diversity in gender and sexuality. I came to see the book’s main message as an indictment of academia for suppressing and denying diversity. I now conclude that all our academic disciplines should go back to school, take ref ...
... I increasingly wondered why we didn’t already know about nature’s wonderful diversity in gender and sexuality. I came to see the book’s main message as an indictment of academia for suppressing and denying diversity. I now conclude that all our academic disciplines should go back to school, take ref ...
View/Open - Digital Collections Home
... analysis demonstrated significant relationships to exist between several variables, including biacetabular breadth, the neck-shaft angle, and the bicondylar angle. The ...
... analysis demonstrated significant relationships to exist between several variables, including biacetabular breadth, the neck-shaft angle, and the bicondylar angle. The ...
The effects of sexual selection and ecology on adaptation and
... I could not have gotten through this long process without the constant support of my family. My parents, my brothers and their families, as well as the Mayberrys have provided a huge amount of encouragement and laughter through the years, which made everything easier. Most importantly, I am incredib ...
... I could not have gotten through this long process without the constant support of my family. My parents, my brothers and their families, as well as the Mayberrys have provided a huge amount of encouragement and laughter through the years, which made everything easier. Most importantly, I am incredib ...
social selection, sexual selection and ecological competition
... with plumage signals that enable them to determine fighting ability and establish social dominance without direct physical contests [42–44]. Many other species use vocal [9] or visual [24] signals to defend foraging territories during the non-breeding season. In all cases, the traits mediating compe ...
... with plumage signals that enable them to determine fighting ability and establish social dominance without direct physical contests [42–44]. Many other species use vocal [9] or visual [24] signals to defend foraging territories during the non-breeding season. In all cases, the traits mediating compe ...
Sexual dimorphism of cranial suture complexity in wild sheep (Ovis
... Sutures in adult males that were significantly more complex than those in adult females were then tested for intersutural differences in complexity within males. To do this, values of complexity for adult males were log-transformed to equalize the variances, and a two-way mixed-model analysis of var ...
... Sutures in adult males that were significantly more complex than those in adult females were then tested for intersutural differences in complexity within males. To do this, values of complexity for adult males were log-transformed to equalize the variances, and a two-way mixed-model analysis of var ...
Parental investment, sexual selection and sex ratios
... 24. B: But now I’m a bit confused. If the mate-limited sex finds it really hard to find new mates, and either sex can do something useful for offspring survival, then shouldn’t it be especially beneficial for the mate-limited sex to care more? 25: A: Indeed. It is a bit like Fisherian sex ratio sele ...
... 24. B: But now I’m a bit confused. If the mate-limited sex finds it really hard to find new mates, and either sex can do something useful for offspring survival, then shouldn’t it be especially beneficial for the mate-limited sex to care more? 25: A: Indeed. It is a bit like Fisherian sex ratio sele ...
Assortative Fertilization in the Elegans-Group of
... Adaptive gene complexes are resistant to genetic recombination and are often inherited as an entire unit. Linkage disequilibrium is the non-random association of two or more alleles (Falconer and Mackay, 1996). Linkage disequilibrium can decrease recombination along chromosomes, thus producing heri ...
... Adaptive gene complexes are resistant to genetic recombination and are often inherited as an entire unit. Linkage disequilibrium is the non-random association of two or more alleles (Falconer and Mackay, 1996). Linkage disequilibrium can decrease recombination along chromosomes, thus producing heri ...
Sexual selection and extinction in deer
... selected traits vary among individuals, both in response to life history trade-offs and in short timescale as a response to environmental conditions (Griffith et al. 1999). Decrease in sexually selected traits due to predation is one example of response to life history trade-off. Variation in second ...
... selected traits vary among individuals, both in response to life history trade-offs and in short timescale as a response to environmental conditions (Griffith et al. 1999). Decrease in sexually selected traits due to predation is one example of response to life history trade-off. Variation in second ...
Modelling the evolution and consequences of mate choice
... This thesis considers the evolution and the consequences of mate choice across a variety of taxa, using game theoretic, population genetic, and quantitative genetic modelling techniques. Part I is about the evolution of mate choice. In chapter 2, a population genetic model shows that mate choice is ...
... This thesis considers the evolution and the consequences of mate choice across a variety of taxa, using game theoretic, population genetic, and quantitative genetic modelling techniques. Part I is about the evolution of mate choice. In chapter 2, a population genetic model shows that mate choice is ...
altruism, sexual selection and causes of male reproductive
... systematically defined or categorized across taxa (but see Taborsky, 2009). Thus, to find peer-reviewed papers documenting examples of male reproductive cooperation, we conducted searches in ISI Web of Knowledge and Google Scholar to obtain the following exact phrase matches: ‘male cooperation’, ‘coop ...
... systematically defined or categorized across taxa (but see Taborsky, 2009). Thus, to find peer-reviewed papers documenting examples of male reproductive cooperation, we conducted searches in ISI Web of Knowledge and Google Scholar to obtain the following exact phrase matches: ‘male cooperation’, ‘coop ...
FEMALE MATE-CHOICE BEHAVIOR AND SYMPATRIC SPECIATION
... impact of these differences on the likelihood of speciation via two different approaches. The first approach is to construct a very simple population genetic model that incorporates the female choice behavior. We are interested in the degree of facilitation of sympatric speciation by various forms o ...
... impact of these differences on the likelihood of speciation via two different approaches. The first approach is to construct a very simple population genetic model that incorporates the female choice behavior. We are interested in the degree of facilitation of sympatric speciation by various forms o ...
Cooperating to compete: altruism, sexual selection
... systematically defined or categorized across taxa (but see Taborsky, 2009). Thus, to find peer-reviewed papers documenting examples of male reproductive cooperation, we conducted searches in ISI Web of Knowledge and Google Scholar to obtain the following exact phrase matches: ‘male cooperation’, ‘coop ...
... systematically defined or categorized across taxa (but see Taborsky, 2009). Thus, to find peer-reviewed papers documenting examples of male reproductive cooperation, we conducted searches in ISI Web of Knowledge and Google Scholar to obtain the following exact phrase matches: ‘male cooperation’, ‘coop ...
Optimal climbing speed explains the evolution of extreme sexual
... proportional to body size. Males are the searching sex in almost all spider species and consequently move a lot more than females, especially in web-building spiders (Foelix, 1996; Aisenberg et al., 2007). In species where females live relatively high up in the vegetation, males probably have to run ...
... proportional to body size. Males are the searching sex in almost all spider species and consequently move a lot more than females, especially in web-building spiders (Foelix, 1996; Aisenberg et al., 2007). In species where females live relatively high up in the vegetation, males probably have to run ...
GUINEA PIGS FOR MEAT PRODUCTION
... larger cavies that have been developed in Ecuador and Peru. Heifer has been trying to obtain them for their own distribution program for three years. They are hopeful that by 1991 they may have a few. These improved strains have been developed by local researchers and are in great demand throughout ...
... larger cavies that have been developed in Ecuador and Peru. Heifer has been trying to obtain them for their own distribution program for three years. They are hopeful that by 1991 they may have a few. These improved strains have been developed by local researchers and are in great demand throughout ...
Female competition and aggression - Philosophical Transactions of
... Diverse behavioural strategies have evolved under intrasexual competition in both sexes, with aggression expressed in a variety of forms. At one extreme, aggression can be direct and unrestrained, with combatants engaged in escalated contests likely to cause serious injury or death. Such extreme agg ...
... Diverse behavioural strategies have evolved under intrasexual competition in both sexes, with aggression expressed in a variety of forms. At one extreme, aggression can be direct and unrestrained, with combatants engaged in escalated contests likely to cause serious injury or death. Such extreme agg ...
mating-induced reversed role of sex pheromone in an insect
... scotophase, and that mating induced a transient inhibition of sex pheromone response in newly mated males (Gadenne et al., 2001). This plasticity is not only seen at the behavioural level but is accompanied by a decrease in the sensitivity of neurons within the AL: most neurons have much higher pher ...
... scotophase, and that mating induced a transient inhibition of sex pheromone response in newly mated males (Gadenne et al., 2001). This plasticity is not only seen at the behavioural level but is accompanied by a decrease in the sensitivity of neurons within the AL: most neurons have much higher pher ...
14_chapter 5
... In the turtle Cuora amboinensis, there is size dimorphism between the male and female species. The females are found to be comparatively larger than the males [Plate 5b and 5c]. The mean female SCL was 166mm in comparison to the mean male SCL of 156mm. Lim and Das (1999) had recorded a carapace leng ...
... In the turtle Cuora amboinensis, there is size dimorphism between the male and female species. The females are found to be comparatively larger than the males [Plate 5b and 5c]. The mean female SCL was 166mm in comparison to the mean male SCL of 156mm. Lim and Das (1999) had recorded a carapace leng ...
Color and Communication in Habronattus Jumping Spiders: Tests of
... Differences between males and females can evolve through a variety of mechanisms, including sexual and ecological selection. Because coloration is evolutionarily labile, sexually dichromatic species are good models for understanding the evolution of sex differences. While many jumping spiders exhibi ...
... Differences between males and females can evolve through a variety of mechanisms, including sexual and ecological selection. Because coloration is evolutionarily labile, sexually dichromatic species are good models for understanding the evolution of sex differences. While many jumping spiders exhibi ...
are African elephants sexually segregated at the habitat scale?
... Graeme Shannon1,2) , Bruce R. Page1) , Kevin J. Duffy3) & Rob Slotow1) (1 Amarula Elephant Research Programme, School of Biological and Conservation Sciences, University of KwaZulu-Natal, Durban 4041, South Africa; 3 Centre for Systems Research, Durban Institute of Technology, Durban, South Africa) ...
... Graeme Shannon1,2) , Bruce R. Page1) , Kevin J. Duffy3) & Rob Slotow1) (1 Amarula Elephant Research Programme, School of Biological and Conservation Sciences, University of KwaZulu-Natal, Durban 4041, South Africa; 3 Centre for Systems Research, Durban Institute of Technology, Durban, South Africa) ...
Patterns of sexual dimorphism in Pan and Gorilla limb bones Tessa
... For Figure 2A, which shows the geometric corrected data for Gorilla, as described in methods, Factor 2 is graphed against Factor 3. The overall species graph shows defined sexual dimorphism. Factor 2 consists of high negative loadings for lengths and one positive loading for radius medio-lateral mid ...
... For Figure 2A, which shows the geometric corrected data for Gorilla, as described in methods, Factor 2 is graphed against Factor 3. The overall species graph shows defined sexual dimorphism. Factor 2 consists of high negative loadings for lengths and one positive loading for radius medio-lateral mid ...
- Wiley Online Library
... results if we assume either density independent selection or a stationary population. The trait at the focus of our study is fitness, II’. As we aim to study mate choice based on good genes, we are interested in the genetic value that is transferable to the offspring. In quantitative genetics this t ...
... results if we assume either density independent selection or a stationary population. The trait at the focus of our study is fitness, II’. As we aim to study mate choice based on good genes, we are interested in the genetic value that is transferable to the offspring. In quantitative genetics this t ...