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Curr Biol. 2016 May 23;26(10):1261-73. doi: 10.1016/j.cub.2016.03.040. Epub 2016 Apr 21.

Mice Develop Efficient Strategies for Foraging and Navigation Using Complex Natural Stimuli.

Author information

1
Department of Molecular and Cellular Biology, and Center for Brain Science, Harvard University, Cambridge, MA 02138, USA; Department of Psychology, University of Washington, Seattle, WA 98195, USA. Electronic address: dhgire@uw.edu.
2
Department of Molecular and Cellular Biology, and Center for Brain Science, Harvard University, Cambridge, MA 02138, USA.
3
CNRS, Université Nice Sophia Antipolis, Laboratoire de Physique de la Matière Condensée, UMR7336, Parc Valrose, Nice 06108, France.
4
Department of Molecular and Cellular Biology, and Center for Brain Science, Harvard University, Cambridge, MA 02138, USA. Electronic address: vnmurthy@fas.harvard.edu.

Abstract

The ability to shift between multiple decision-making strategies during natural behavior allows animals to strike a balance between flexibility and efficiency. We investigated odor-guided navigation by mice to understand how decision-making strategies are balanced during a complex natural behavior. Mice navigated to odor sources in an open arena using naturally fluctuating airborne odor cues as their positions were recorded precisely in real time. When mice had limited prior experience of source locations, their search behavior was consistent with a gradient ascent algorithm that utilized directional cues in the plume to navigate to the odor source. Gradient climbing was effective because the arena size allowed animals to conduct their search mainly within the odor plume, with frequent odor contacts. With increased experience, mice shifted their strategy from this flexible, sensory-driven search behavior to a more efficient and stereotyped foraging approach that varied little in response to odor plumes. This study demonstrates that mice use prior knowledge to adaptively balance flexibility and efficiency during complex behavior guided by dynamic natural stimuli.

PMID:
27112299
PMCID:
PMC4951102
DOI:
10.1016/j.cub.2016.03.040
[Indexed for MEDLINE]
Free PMC Article

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