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Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters

How insects navigate complex odor plumes, where the location and timing of odor packets are uncertain, remains unclear. Here we imaged complex odor plumes simultaneously with freely-walking flies, quantifying how behavior is shaped by encounters with individual odor packets. We found that navigation...

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Autores principales: Demir, Mahmut, Kadakia, Nirag, Anderson, Hope D, Clark, Damon A, Emonet, Thierry
Formato: Online Artículo Texto
Lenguaje:English
Publicado: eLife Sciences Publications, Ltd 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7609052/
https://www.ncbi.nlm.nih.gov/pubmed/33140723
http://dx.doi.org/10.7554/eLife.57524
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author Demir, Mahmut
Kadakia, Nirag
Anderson, Hope D
Clark, Damon A
Emonet, Thierry
author_facet Demir, Mahmut
Kadakia, Nirag
Anderson, Hope D
Clark, Damon A
Emonet, Thierry
author_sort Demir, Mahmut
collection PubMed
description How insects navigate complex odor plumes, where the location and timing of odor packets are uncertain, remains unclear. Here we imaged complex odor plumes simultaneously with freely-walking flies, quantifying how behavior is shaped by encounters with individual odor packets. We found that navigation was stochastic and did not rely on the continuous modulation of speed or orientation. Instead, flies turned stochastically with stereotyped saccades, whose direction was biased upwind by the timing of prior odor encounters, while the magnitude and rate of saccades remained constant. Further, flies used the timing of odor encounters to modulate the transition rates between walks and stops. In more regular environments, flies continuously modulate speed and orientation, even though encounters can still occur randomly due to animal motion. We find that in less predictable environments, where encounters are random in both space and time, walking flies navigate with random walks biased by encounter timing.
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spelling pubmed-76090522020-11-04 Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters Demir, Mahmut Kadakia, Nirag Anderson, Hope D Clark, Damon A Emonet, Thierry eLife Neuroscience How insects navigate complex odor plumes, where the location and timing of odor packets are uncertain, remains unclear. Here we imaged complex odor plumes simultaneously with freely-walking flies, quantifying how behavior is shaped by encounters with individual odor packets. We found that navigation was stochastic and did not rely on the continuous modulation of speed or orientation. Instead, flies turned stochastically with stereotyped saccades, whose direction was biased upwind by the timing of prior odor encounters, while the magnitude and rate of saccades remained constant. Further, flies used the timing of odor encounters to modulate the transition rates between walks and stops. In more regular environments, flies continuously modulate speed and orientation, even though encounters can still occur randomly due to animal motion. We find that in less predictable environments, where encounters are random in both space and time, walking flies navigate with random walks biased by encounter timing. eLife Sciences Publications, Ltd 2020-11-03 /pmc/articles/PMC7609052/ /pubmed/33140723 http://dx.doi.org/10.7554/eLife.57524 Text en © 2020, Demir et al http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited.
spellingShingle Neuroscience
Demir, Mahmut
Kadakia, Nirag
Anderson, Hope D
Clark, Damon A
Emonet, Thierry
Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title_full Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title_fullStr Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title_full_unstemmed Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title_short Walking Drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
title_sort walking drosophila navigate complex plumes using stochastic decisions biased by the timing of odor encounters
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7609052/
https://www.ncbi.nlm.nih.gov/pubmed/33140723
http://dx.doi.org/10.7554/eLife.57524
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