scholarly journals Sexual signal loss in field crickets maintained despite strong sexual selection favoring singing males

Evolution ◽  
2019 ◽  
Vol 73 (7) ◽  
pp. 1482-1489 ◽  
Author(s):  
Jessie C. Tanner ◽  
Elizabeth Swanger ◽  
Marlene Zuk
Keyword(s):  
Sexual Selection ◽  
Signal Loss ◽  
Sexual Signal ◽  
Field Crickets

Spermatophore retention may accommodate sexual signal loss in Pacific field crickets

2020 ◽  
Vol 74 (8) ◽  
Author(s):  
Mounica V. Kota ◽  
Ellen M. Urquhart ◽  
Marlene Zuk
Keyword(s):  
Signal Loss ◽  
Sexual Signal ◽  
Field Crickets

scholarly journals Silent crickets reveal the genomic footprint of recent adaptive trait loss

2018 ◽  
Author(s):  
Sonia Pascoal ◽  
Judith E. Risse ◽  
Xiao Zhang ◽  
Mark Blaxter ◽  
Timothee Cezard ◽  
...  
Keyword(s):  
Gene Expression ◽  
Signal Loss ◽  
Sexual Signal ◽  
Adaptive Trait ◽  
Field Crickets ◽  
Altered Gene Expression ◽  
Genome Wide ◽  
Altered Gene ◽  
High Density Linkage Map ◽  
Mutational Effect

Secondary trait loss is widespread and has profound consequences, from generating diversity to driving adaptation. Sexual trait loss is particularly common. Its genomic impact is challenging to reconstruct because most reversals occurred in the distant evolutionary past and must be inferred indirectly, and questions remain about the extent of disruption caused by pleiotropy, altered gene expression and loss of homeostasis. We tested the genomic signature of recent sexual signal loss in Hawaiian field crickets, Teleogryllus oceanicus. Song loss is controlled by a sex-linked Mendelian locus, flatwing, which feminises male wings by erasing sound-producing veins. This variant spread rapidly under pressure from an eavesdropping parasitoid fly. We sequenced, assembled and annotated the T. oceanicus genome, produced a high-density linkage map, and localised flatwing on the X chromosome. We characterised pleiotropic effects of flatwing, including changes in embryonic gene expression and alteration of another sexual signal, chemical pheromones. Song loss is associated with pleiotropy, hitchhiking and genome-wide regulatory disruption which feminises flatwing male pheromones. The footprint of recent adaptive trait loss illustrates R. A. Fisher's influential prediction that variants with large mutational effect sizes can invade genomes during the earliest stages of adaptation to extreme pressures, despite having severely disruptive genomic consequences.

scholarly journals Testing the role of trait reversal in evolutionary diversification using song loss in wild crickets

2019 ◽  
Vol 116 (18) ◽  
pp. 8941-8949 ◽  
Author(s):  
Nathan W. Bailey ◽  
Sonia Pascoal ◽  
Fernando Montealegre-Z
Keyword(s):  
Rapid Evolution ◽  
Acoustic Signals ◽  
Signal Loss ◽  
Normal Range ◽  
Laser Doppler Vibrometry ◽  
Sexual Signal ◽  
Evolutionary Diversification ◽  
Field Crickets ◽  
Morphological Variants

The mechanisms underlying rapid macroevolution are controversial. One largely untested hypothesis that could inform this debate is that evolutionary reversals might release variation in vestigial traits, which then facilitates subsequent diversification. We evaluated this idea by testing key predictions about vestigial traits arising from sexual trait reversal in wild field crickets. In Hawaiian Teleogryllus oceanicus, the recent genetic loss of sound-producing and -amplifying structures on male wings eliminates their acoustic signals. Silence protects these “flatwing” males from an acoustically orienting parasitoid and appears to have evolved independently more than once. Here, we report that flatwing males show enhanced variation in vestigial resonator morphology under varied genetic backgrounds. Using laser Doppler vibrometry, we found that these vestigial sound-producing wing features resonate at highly variable acoustic frequencies well outside the normal range for this species. These results satisfy two important criteria for a mechanism driving rapid evolutionary diversification: Sexual signal loss was accompanied by a release of vestigial morphological variants, and these could facilitate the rapid evolution of novel signal values. Widespread secondary trait losses have been inferred from fossil and phylogenetic evidence across numerous taxa, and our results suggest that such reversals could play a role in shaping historical patterns of diversification.

Sexual signal loss, pleiotropy, and maintenance of a male reproductive polymorphism in crickets

Evolution ◽  
2020 ◽  
Vol 74 (5) ◽  
pp. 1002-1009
Author(s):  
Justa L. Heinen‐Kay ◽  
Rachel E. Nichols ◽  
Marlene Zuk
Keyword(s):  
Signal Loss ◽  
Sexual Signal

scholarly journals When Does Sexual Signal Exploitation Lead to Signal Loss?

2019 ◽  
Vol 7 ◽  
Author(s):  
Justa L. Heinen-Kay ◽  
Marlene Zuk
Keyword(s):  
Signal Loss ◽  
Sexual Signal

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 A trade-off between natural and sexual selection underlies diversification of a sexual signal

2014 ◽  
Vol 26 (2) ◽  
pp. 533-542 ◽  
Author(s):  
Justa L. Heinen-Kay ◽  
Kirstin E. Morris ◽  
Nicole A. Ryan ◽  
Samantha L. Byerley ◽  
Rebecca E. Venezia ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Sexual Signal ◽  
Trade Off ◽  
Natural And Sexual Selection

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 Sexual signal loss: The link between behaviour and rapid evolutionary dynamics in a field cricket

2018 ◽  
Vol 87 (3) ◽  
pp. 623-633 ◽  
Author(s):  
Marlene Zuk ◽  
Nathan W. Bailey ◽  
Brian Gray ◽  
John T. Rotenberry
Keyword(s):  
Evolutionary Dynamics ◽  
Field Cricket ◽  
Signal Loss ◽  
Sexual Signal
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