Sexual selection and the evolution of mating systems

In that view, many human artifacts could be considered subject to sexual selection as part of the extended phenotype, for instance clothing that enhances sexually selected traits. Richard Dawkins argued that. Journal of Avian Biology — Results of the posthoc analysis are given above the plotting frame, letters not shared indicate treatments that show statistical significant differences see Results for details. All statistical analyses were run in the R environment version 2. Association with post-mating response and female fitness. We will be provided with an authorization token please note: passwords are not shared with us and will sync your accounts for you.
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Abstract Background Despite the common assumption that multiple mating should in general be favored in males, but not in females, to date there is no consensus on the general impact of multiple mating on female fitness. These transcripts are subject to changes in expression levels after mating Table 2 , with mated monogamous flies showing a more virgin-like expression profile for these genes Additional file 1 : Figures S2A. Mate choice, monogamy and mutational load. A MR-GSE test was also used to test whether the set of significant transcripts showed a tendency to be associated with female fitness, using the t -values from a previously published study [ 60 ] on the same population. In other words, males may gain more offspring by repeated matings than females, even though both sexes have the same average numbers of matings, mates and offspring [ 3 ]. Joan Roughgarden , citing elements of sexual behavior in animals and humans that cannot be explained by the sexual-selection model, suggested that the function of sex in human evolution was primarily social. He also hypothesized that contrasts in sexual selection acting along with natural selection were significant factors in the geographical differentiation in human appearance of some isolated groups, as he did not believe that natural selection alone provided a satisfactory answer.
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Sexual selection in humans - Wikipedia

Behaviour — Innocenti P, Morrow EH: Immunogenic males: a genome-wide analysis of reproduction and the cost of mating in Drosophila melanogaster females. With modern genomic techniques, it is possible to scan whole genomes and transcriptomes and associate them with the corresponding phenotypes. Instead, we found an interesting evolutionary pattern: Songs seemed to be evolving faster polygynous lineages, but not in any particular direction. Further information: Sex differences in humans.
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This approach is easier to test and interpret than current frameworks emphasizing optimality or parental investment theory. Significance of differential expression was assessed using the package limma Linear Models for Microarray Data; [ 57 ]. Citations Publications citing this paper. In particular, most studies on these behaviors have been conducted in temperate, boreal, and polar regions see Figs. Hence, for each of the replicate population we collected 4 independent samples of eight females, two samples of females mated to males of the same replicate population, and two samples of females mated to males of a single replicate population in the other treatment, giving a total of 32 samples.
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