1. Evolutionary Biology
  2. Neuroscience
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Divergent sensory investment mirrors potential speciation via niche partitioning across Drosophila

  1. Ian W Keesey  Is a corresponding author
  2. Veit Grabe
  3. Markus Knaden  Is a corresponding author
  4. Bill S Hansson  Is a corresponding author
  1. Max Planck Institute for Chemical Ecology, Germany
Research Article
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Cite this article as: eLife 2020;9:e57008 doi: 10.7554/eLife.57008

Abstract

The examination of phylogenetic and phenotypic characteristics of the nervous system, such as behavior and neuroanatomy, can be utilized as a means to assess speciation. Recent studies have proposed a fundamental tradeoff between two sensory organs, the eye and the antenna. However, the identification of ecological mechanisms for this observed tradeoff have not been firmly established. Our current study examines several monophyletic species within the obscura group, and asserts that despite their close relatedness and overlapping ecology, they deviate strongly in both visual and olfactory investment. We contend that both courtship and microhabitat preferences support the observed inverse variation in these sensory traits. Here, this variation in visual and olfactory investment seems to provide relaxed competition, a process by which similar species can use a shared environment differently and in ways that help them coexist. Moreover, that behavioral separation according to light gradients occurs first, and subsequently, courtship deviations arise.

Article and author information

Author details

  1. Ian W Keesey

    Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Jena, Germany
    For correspondence
    ikeesey@ice.mpg.de
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-3339-7249
  2. Veit Grabe

    Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Jena, Germany
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-0736-2771
  3. Markus Knaden

    Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Jena, Germany
    For correspondence
    mknaden@ice.mpg.de
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-6710-1071
  4. Bill S Hansson

    Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Jena, Germany
    For correspondence
    hansson@ice.mpg.de
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-4811-1223

Funding

Max-Planck-Gesellschaft (Open-access funding)

  • Ian W Keesey
  • Veit Grabe
  • Markus Knaden
  • Bill S Hansson

The funding organization had no role in the study design, data collection, interpretation, nor the decision to submit the work for publication. The authors declare no competing interests.

Reviewing Editor

  1. Virginie Courtier-Orgogozo, Université Paris-Diderot CNRS, France

Publication history

  1. Received: March 17, 2020
  2. Accepted: June 30, 2020
  3. Accepted Manuscript published: June 30, 2020 (version 1)

Copyright

© 2020, Keesey et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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