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Individual, but not population asymmetries, are modulated by social environment and genotype in Drosophila melanogaster

Elisabetta Versace, Matteo Caffini, Zach Werkhoven, Benjamin L. de Bivort
doi: https://doi.org/10.1101/694901
Elisabetta Versace
1Department of Organismic and Evolutionary Biology and Center for Brain Science, Harvard University (USA)
2Department of Biological and Experimental Psychology, Queen Mary University of London (UK)
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  • For correspondence: e.versace@qmul.ac.uk debivort@oeb.harvard.edu
Matteo Caffini
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Zach Werkhoven
1Department of Organismic and Evolutionary Biology and Center for Brain Science, Harvard University (USA)
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Benjamin L. de Bivort
1Department of Organismic and Evolutionary Biology and Center for Brain Science, Harvard University (USA)
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  • For correspondence: e.versace@qmul.ac.uk debivort@oeb.harvard.edu
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Abstract

Theory predicts that social interactions can induce an alignment of behavioral asymmetries between individuals (i.e., population-level lateralization), but evidence for this effect is mixed. To understand how interaction with other individuals affects behavioral asymmetries, we systematically manipulated the social environment of Drosophila melanogaster, testing individual flies and dyads (female-male, female-female and male-male pairs). In these social contexts we measured individual and population asymmetries in individual behaviors (circling asymmetry, wing use) and dyadic behaviors (relative position and orientation between two flies) in five different genotypes. We reasoned that if coordination between individuals drives alignment of behavioral asymmetries, greater alignment at the population-level should be observed in social contexts compared to solitary individuals. We observed that the presence of other individuals influenced the behavior and position of flies but had unexpected effects with respect to individual and population asymmetries: individual-level asymmetries were strong and modulated by the social context but population-level asymmetries were mild or absent. Moreover, the strength of individual-level asymmetries differed between strains, but this was not the case for population-level asymmetries. These findings suggest that the degree of social interaction found in Drosophila is insufficient to drive population-level behavioral asymmetries.

Footnotes

  • http://lab.debivort.org/social-asymmetries/

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted July 07, 2019.
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Individual, but not population asymmetries, are modulated by social environment and genotype in Drosophila melanogaster
Elisabetta Versace, Matteo Caffini, Zach Werkhoven, Benjamin L. de Bivort
bioRxiv 694901; doi: https://doi.org/10.1101/694901
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Individual, but not population asymmetries, are modulated by social environment and genotype in Drosophila melanogaster
Elisabetta Versace, Matteo Caffini, Zach Werkhoven, Benjamin L. de Bivort
bioRxiv 694901; doi: https://doi.org/10.1101/694901

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