Abstract
We introduce a method based on machine vision for automatically measuring aggression and courtship in Drosophila melanogaster. The genetic and neural circuit bases of these innate social behaviors are poorly understood. High-throughput behavioral screening in this genetically tractable model organism is a potentially powerful approach, but it is currently very laborious. Our system monitors interacting pairs of flies and computes their location, orientation and wing posture. These features are used for detecting behaviors exhibited during aggression and courtship. Among these, wing threat, lunging and tussling are specific to aggression; circling, wing extension (courtship 'song') and copulation are specific to courtship; locomotion and chasing are common to both. Ethograms may be constructed automatically from these measurements, saving considerable time and effort. This technology should enable large-scale screens for genes and neural circuits controlling courtship and aggression.
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Change history
22 March 2009
NOTE: In the version of this article initially published online, an attribution was omitted. The observation that genetic feminization of cholinergic neurons increases aggression was originally reported in abstract form (Y.B. Chan and E.A. Kravitz, Cold Spring Harbor Laboratory Neurobiology of Drosophila Abstracts, 42, 2005). The error has been corrected for the print, PDF and HTML versions of this article.
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Acknowledgements
We thank K. Watanabe and A. Hergarden for helping prepare the flies, assays, taking video footage of flies as well as collecting ground-truth data. This work was supported by a National Science Foundation Frontiers in Integrative Biological Research grant to M.J. Dickinson, D.J.A. and E. Isacoff, a National Science Foundation National Institutes of Health grant to P.P. and M.J. Dickinson, and a postdoctoral fellowship of the Alexander von Humboldt-Foundation to H.D. We thank M. Heisenberg for sponsoring H.D. in Germany and for sharing information and data regarding aggression arenas and automated assays.
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Supplementary Text and Figures
Supplementary Figures 1–6, Supplementary Tables 1–9, Supplementary Methods (PDF 3305 kb)
Supplementary Video 1
High-resolution movie clip of a lunge (top view), complementing Figure 3a. (MOV 47 kb)
Supplementary Video 2
Movie clip of body and wing tracking during a lunge. (MOV 251 kb)
Supplementary Video 3
High-resolution movie clip of tussling (top view), complementing Figure 3b. (MOV 141 kb)
Supplementary Video 4
High-resolution movie clip of a wing threat (side view), complementing Figure 3c. (MOV 86 kb)
Supplementary Video 5
Movie clip of body and wing tracking during a wing threat. (MOV 564 kb)
Supplementary Video 6
High-resolution movie clip of wing extension and circling (top view), complementing Figure 3e. (MOV 185 kb)
Supplementary Video 7
Movie clip of body and wing tracking during wing extension and circling. (MOV 2009 kb)
Supplementary Video 8
High-resolution movie clip of copulation (side view), complementing Figure 3d. (MOV 762 kb)
Supplementary Video 9
High-resolution movie clip of copulation with wing extension and circling (top view), complementing Figure 3d. (MOV 259 kb)
Supplementary Video 10
High-resolution movie clip of chasing (top view), complementing Figure 3f. (MOV 742 kb)
Supplementary Software
Source code of “Caltech Automated Drosophila Aggression-Courtship Behavioral Repertoire Analysis (CADABRA)”. (ZIP 3904 kb)
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Dankert, H., Wang, L., Hoopfer, E. et al. Automated monitoring and analysis of social behavior in Drosophila. Nat Methods 6, 297–303 (2009). https://doi.org/10.1038/nmeth.1310
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DOI: https://doi.org/10.1038/nmeth.1310
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