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Published July 15, 2010 | Published + Supplemental Material
Journal Article Open

Object preference by walking fruit flies, Drosophila melanogaster, is mediated by vision and graviperception


Walking fruit flies, Drosophila melanogaster, use visual information to orient towards salient objects in their environment, presumably as a search strategy for finding food, shelter or other resources. Less is known, however, about the role of vision or other sensory modalities such as mechanoreception in the evaluation of objects once they have been reached. To study the role of vision and mechanoreception in exploration behavior, we developed a large arena in which we could track individual fruit flies as they walked through either simple or more topologically complex landscapes. When exploring a simple, flat environment lacking three-dimensional objects, flies used visual cues from the distant background to stabilize their walking trajectories. When exploring an arena containing an array of cones, differing in geometry, flies actively oriented towards, climbed onto, and explored the objects, spending most of their time on the tallest, steepest object. A fly's behavioral response to the geometry of an object depended upon the intrinsic properties of each object and not a relative assessment to other nearby objects. Furthermore, the preference was not due to a greater attraction towards tall, steep objects, but rather a change in locomotor behavior once a fly reached and explored the surface. Specifically, flies are much more likely to stop walking for long periods when they are perched on tall, steep objects. Both the vision system and the antennal chordotonal organs (Johnston's organs) provide sufficient information about the geometry of an object to elicit the observed change in locomotor behavior. Only when both these sensory systems were impaired did flies not show the behavioral preference for the tall, steep objects.

Additional Information

© 2010 Published by The Company of Biologists Ltd. Accepted 7 April 2010. The authors thank Kristin Branson for her discussions of behavioral analysis, as well as Martin Peek and Neil Halelamien for their help developing the first version of the arena and tracking software. This work was supported by grants from the National Institutes of Health (R01DA022777-04; A.R.), and the National Science Foundation (0623527) to M.H.D. Deposited in PMC for release after 12 months.

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Published - Robie2010p10646J_Exp_Biol.pdf


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August 22, 2023
August 22, 2023