scholarly journals Divergence in female damselfly sensory structures is consistent with a species recognition function but shows no evidence of reproductive character displacement

2018 ◽  
Vol 8 (23) ◽  
pp. 12101-12114 ◽  
Author(s):  
Alexandra A. Barnard ◽  
John P. Masly
Keyword(s):  
Species Recognition ◽  
Character Displacement ◽  
Reproductive Character Displacement ◽  
Reproductive Character ◽  
Recognition Function ◽  
Sensory Structures

scholarly journals Quantitative variation in female sensory structures supports species recognition and intraspecific mate choice functions in damselflies

2018 ◽  
Author(s):  
Alexandra A. Barnard ◽  
John P. Masly
Keyword(s):  
Mate Choice ◽  
Reproductive Isolation ◽  
Species Recognition ◽  
Character Displacement ◽  
Physical Contact ◽  
Reproductive Character Displacement ◽  
Species Identity ◽  
Sensory Structures ◽  
Males And Females ◽  
Species Specific

AbstractMales and females exchange signals prior to mating that convey information such as sex, species identity, or individual condition. Tactile signals relayed during physical contact between males and females before and during mating appear to be important for mate choice and reproductive isolation in some animals. However, compared to our understanding of visual, auditory, and chemical signals, we know little about the importance of tactile signals in mating decisions. Among North American damselflies in the genus Enallagma (Odonata: Coenagrionidae) species-specific tactile stimulation contributes to reproductive isolation between species and may also be important for intraspecific mate choice. We quantified several mechanosensory sensilla phenotypes on the female thorax among multiple sympatric and allopatric populations of two Enallagma species that occasionally interbreed in nature. Although each species differed in features of sensilla distribution within the thoracic plates, we found no strong evidence of reproductive character displacement among the sensilla traits we measured in regions of sympatry. However, substantial variation of sensilla traits was observed within populations of both species. Our results suggest that species-specific placement of female mechanoreceptors appears sufficient for species recognition, but mechanosensor variation among females within species may be important for mate choice.

Asymmetric acoustic signal recognition led to asymmetric gene flow between two parapatric frogs

2020 ◽  
Author(s):  
Yu-Wei Hsiao ◽  
Hui-Yun Tseng ◽  
Hung Ngoc Nguyen ◽  
Si-Min Lin
Keyword(s):  
Gene Flow ◽  
Contact Region ◽  
Character Displacement ◽  
Secondary Contact ◽  
Genetic Introgression ◽  
Genetic Integrity ◽  
Signal Recognition ◽  
Reproductive Character Displacement ◽  
Reproductive Character ◽  
Behavioural Experiments

Abstract Correct discrimination between courtship signals could help to maintain genetic integrity between closely related species. However, asymmetric usage of signals might cause asymmetric gene flow across the contact zone. Buergeria choui and B. otai are sibling-species with a parapatric distribution pattern in Taiwan, having two narrow contact zones on the east and west sides of the island. Combining behavioural experiments with genome-wide RAD-seq analyses, we test whether the ability of signal recognition influences genetic introgression across their species boundary. The playback experiments show that all B. choui populations respond strongest to their own ‘cricket’ trills, while the western population of B. otai have evolved a strong level of reproductive character displacement by showing the inclusive usage of the unique ‘chicken’ signals. In contrast, the eastern B. otai population uses both ‘chicken’ and ‘cricket’ trills, and has a stronger preference for the latter. The weak reproductive character displacement in the eastern population has led to asymmetry genetic introgression from B. choui toward B. otai. Our results support the prediction that a more specialized signal-user, compared to its sibling, generalized signal-user, might have a higher probability of maintaining their genetic integrity in the secondary contact region.

scholarly journals Phylo-comparative analyses reveal the dual role of drift and selection in reproductive character displacement

2019 ◽  
Vol 140 ◽  
pp. 106597
Author(s):  
İsmail K. Sağlam ◽  
Michael R. Miller ◽  
Sean O'Rourke ◽  
Selim S. Çağlar
Keyword(s):  
Character Displacement ◽  
Dual Role ◽  
Reproductive Character Displacement ◽  
Comparative Analyses ◽  
Reproductive Character

scholarly journals Reproductive character displacement generates reproductive isolation among conspecific populations: an artificial neural network study

2006 ◽  
Vol 273 (1592) ◽  
pp. 1361-1368 ◽  
Author(s):  
Karin S Pfennig ◽  
Michael J Ryan
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Artificial Neural Network ◽  
Artificial Neural Networks ◽  
Reproductive Isolation ◽  
Mate Recognition ◽  
Character Displacement ◽  
Reproductive Character Displacement ◽  
Reproductive Character ◽  
Artificial Neural

When interactions with heterospecifics prevent females from identifying conspecific mates, natural selection can promote the evolution of mating behaviours that minimize such interactions. Consequently, mating behaviours may diverge among conspecific populations in sympatry and in allopatry with heterospecifics. This divergence in conspecific mating behaviours—reproductive character displacement—can initiate speciation if mating behaviours become so divergent as to generate reproductive isolation between sympatric and allopatric conspecifics. We tested these ideas by using artificial neural networks to simulate the evolution of conspecific mate recognition in populations sympatric and allopatric with different heterospecifics. We found that advertisement calls diverged among the different conspecific populations. Consequently, networks strongly preferred calls from their own population to those from foreign conspecific populations. Thus, reproductive character displacement may promote reproductive isolation and, ultimately, speciation among conspecific populations.

scholarly journals POSITIVE FEEDBACK BETWEEN ECOLOGICAL AND REPRODUCTIVE CHARACTER DISPLACEMENT IN A YOUNG AVIAN HYBRID ZONE

Evolution ◽  
2011 ◽  
Vol 66 (4) ◽  
pp. 1167-1179 ◽  
Author(s):  
Niclas Vallin ◽  
Amber M. Rice ◽  
Richard I. Bailey ◽  
Arild Husby ◽  
Anna Qvarnström
Keyword(s):  
Hybrid Zone ◽  
Positive Feedback ◽  
Character Displacement ◽  
Reproductive Character Displacement ◽  
Reproductive Character
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