scholarly journals Sexual selection and population divergence I: The influence of socially flexible cuticular hydrocarbon expression in male field crickets (Teleogryllus oceanicus)

Evolution ◽  
2016 ◽  
Vol 70 (1) ◽  
pp. 82-97 ◽  
Author(s):  
Sonia Pascoal ◽  
Magdalena Mendrok ◽  
Christopher Mitchell ◽  
Alastair J. Wilson ◽  
John Hunt ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Cuticular Hydrocarbon ◽  
Population Divergence ◽  
Teleogryllus Oceanicus ◽  
Field Crickets

scholarly journals Sexual selection and population divergence II. Divergence in different sexual traits and signal modalities in field crickets (Teleogryllus oceanicus )

Evolution ◽  
2017 ◽  
Vol 71 (6) ◽  
pp. 1614-1626 ◽  
Author(s):  
Sonia Pascoal ◽  
Magdalena Mendrok ◽  
Alastair J. Wilson ◽  
John Hunt ◽  
Nathan W. Bailey
Keyword(s):  
Sexual Selection ◽  
Population Divergence ◽  
Teleogryllus Oceanicus ◽  
Field Crickets ◽  
Sexual Traits

scholarly journals Sexual selection and speciation in field crickets

2000 ◽  
Vol 97 (26) ◽  
pp. 14449-14454 ◽  
Author(s):  
D. A. Gray ◽  
W. H. Cade
Keyword(s):  
Sexual Selection ◽  
Field Crickets

scholarly journals Are attractive male crickets better able to pay the costs of an immune challenge?

2015 ◽  
Author(s):  
Clint D Kelly ◽  
Melissa Telemeco ◽  
Amy L Toth ◽  
Lyric C Bartholomay
Keyword(s):  
Sexual Selection ◽  
Immune Activation ◽  
Immune Challenge ◽  
Trade Off ◽  
Gryllus Texensis ◽  
Field Crickets ◽  
Sexual Display ◽  
The Face ◽  
Future Reproduction ◽  
Attractive Male

Reproduction and immunity are fitness-related traits that trade-off with each other. Parasite-mediated theories of sexual selection suggest, however, that higher-quality males should suffer smaller costs to reproduction-related traits and behaviours (e.g. sexual display) from an immune challenge because these males possess more resources with which to deal with the challenge. We used Gryllus texensis field crickets to test the prediction that attractive males should better maintain the performance of a fitness-related traits (e.g. calling effort) in the face of an immune challenge compared with unattractive males. We found no support for our original predictions. However, that immune activation causes attractive males to significantly increase their calling effort compared with unattractive males suggests that these males might terminally invest in order to compensate for decreased future reproduction.

scholarly journals Endless forms of sexual selection

2019 ◽  
Author(s):  
Willow R Lindsay ◽  
Staffan Andersson ◽  
Badreddine Bererhi ◽  
Jacob Höglund ◽  
Arild Johnsen ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Mate Choice ◽  
Sexual Conflict ◽  
Genetic Architecture ◽  
Mating Systems ◽  
Population Divergence ◽  
Trait Evolution ◽  
Mating Competition ◽  
Mhc Genes

The field of sexual selection has burgeoned with research into trait evolution in the context of ecology, sociality, phylogeny, natural selection, and sexual conflict. This paper is the product of a “stock-taking” workshop; our aim is to stimulate discussion, not to provide an exhaustive review. We identify outstanding questions organized into four thematic sections. 1) Evolution of mate choice and mating systems. Variation in mate quality can generate mating competition and choice in either sex with implications for the evolution of mating systems. Limitations on mate choice may dictate the importance of direct vs. indirect benefits in mating decisions and consequently, mating systems. Specifically, polyandry evolves in response to the strength of pre- vs. post-copulatory selection. The evolution of polyandry may be related to diversity of pathogens and Major Histocompatibility Complex (MHC) genes. MHC genes are also potential cues of kinship in avoidance of inbreeding. The balance between inbreeding avoidance and inclusive fitness in mating decisions deserves greater attention. 2) Sender and receiver mechanisms shaping signal design. Mediation of honest signal content likely depends on integration of temporally variable social and physiological costs that are a challenge to measure. The neuroethology of sensory and cognitive receiver biases is the main key to signal form and the ‘aesthetic sense’ proposed by Darwin. Since a receiver bias is sufficient to both start and drive ornament or armament exaggeration, without a genetically correlated or even coevolving receiver, this may be the appropriate ‘null model’ of sexual selection. 3) Genetic architecture of sexual selection. Despite advances in modern molecular techniques, the number and identity of genes underlying performance remain largely unknown. A combination of genomic techniques and long-term field studies that reveal ecological correlates of reproductive success is warranted. In-depth investigations into the genetic basis of sexual dimorphism will reveal constraints and trajectories of sexually selected trait evolution. 4) Sexual selection and conflict as drivers of speciation. Population divergence and speciation is often driven by an interplay between sexual and natural selection. To what extent sexual selection promotes or counteracts population divergence may differ depending on the genetic architecture of traits as well as covariance between mating competition and local adaptation, if traits have multiple functions and if sensory systems used in mate choice are locally adapted. Also, post-copulatory processes, e.g. selection against heterospecific sperm, may influence the importance of sexual selection. Sexual conflict can shape speciation processes, since mate choice selection on females can restrict gene flow whereas selection on males is permissive. We propose that efforts to resolve these four themes can catalyze conceptual progress in the field of sexual selection.

scholarly journals Endless forms of sexual selection

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7988 ◽  
Author(s):  
Willow R. Lindsay ◽  
Staffan Andersson ◽  
Badreddine Bererhi ◽  
Jacob Höglund ◽  
Arild Johnsen ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Mate Choice ◽  
Genetic Architecture ◽  
Mating Systems ◽  
Molecular Techniques ◽  
Population Divergence ◽  
Signal Design ◽  
Honest Signal ◽  
Secondary Sexual Traits ◽  
Sexually Selected Traits

In recent years, the field of sexual selection has exploded, with advances in theoretical and empirical research complementing each other in exciting ways. This perspective piece is the product of a “stock-taking” workshop on sexual selection and sexual conflict. Our aim is to identify and deliberate on outstanding questions and to stimulate discussion rather than provide a comprehensive overview of the entire field. These questions are organized into four thematic sections we deem essential to the field. First we focus on the evolution of mate choice and mating systems. Variation in mate quality can generate both competition and choice in the opposite sex, with implications for the evolution of mating systems. Limitations on mate choice may dictate the importance of direct vs. indirect benefits in mating decisions and consequently, mating systems, especially with regard to polyandry. Second, we focus on how sender and receiver mechanisms shape signal design. Mediation of honest signal content likely depends on integration of temporally variable social and physiological costs that are challenging to measure. We view the neuroethology of sensory and cognitive receiver biases as the main key to signal form and the ‘aesthetic sense’ proposed by Darwin. Since a receiver bias is sufficient to both initiate and drive ornament or armament exaggeration, without a genetically correlated or even coevolving receiver, this may be the appropriate ‘null model’ of sexual selection. Thirdly, we focus on the genetic architecture of sexually selected traits. Despite advances in modern molecular techniques, the number and identity of genes underlying performance, display and secondary sexual traits remains largely unknown. In-depth investigations into the genetic basis of sexual dimorphism in the context of long-term field studies will reveal constraints and trajectories of sexually selected trait evolution. Finally, we focus on sexual selection and conflict as drivers of speciation. Population divergence and speciation are often influenced by an interplay between sexual and natural selection. The extent to which sexual selection promotes or counteracts population divergence may vary depending on the genetic architecture of traits as well as the covariance between mating competition and local adaptation. Additionally, post-copulatory processes, such as selection against heterospecific sperm, may influence the importance of sexual selection in speciation. We propose that efforts to resolve these four themes can catalyze conceptual progress in the field of sexual selection, and we offer potential avenues of research to advance this progress.

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