Evolutionary shift towards lateral line dependent prey capture behavior in the blind Mexican cavefish

Developmental Biology
Evan LloydAlex C Keene

Abstract

Feeding strategies are dependent on multi-modal sensory processing, that integrates visual, chemosensory, and mechanoreceptive cues. In many fish species, local environments and food availability dramatically influence the evolution of sensory and morphological traits that underlie feeding. The Mexican cavefish, Astyanax mexicanus, have developed robust changes in sensory-dependent behaviors, but the impact on prey detection and feeding behavior is not known. In the absence of eyes, cavefish have evolved enhanced sensitivity of the lateral line, comprised of mechanosensory organs that sense water flow and detect prey. Here, we identify evolved differences in prey capture behavior of larval cavefish that are dependent on lateral line sensitivity. Under lighted conditions, cavefish strike Artemia prey at a wider angle than surface fish; however, this difference is diminished under dark conditions. In addition, the strike distance is greater in cavefish than surface fish, revealing an ability to capture, and likely detect, prey at greater distances. Experimental ablation of the lateral line disrupts prey capture in cavefish under both light and dark conditions, while it only impacts surface fish under dark conditions. Together, th...Continue Reading

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Citations

Apr 3, 2019·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Bethany A StahlNicolas Rohner
Apr 18, 2019·Bioinspiration & Biomimetics·Yonggang JiangDeyuan Zhang
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Aug 12, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Alexandra PazAlex C Keene
Apr 30, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Ernesto MaldonadoAtaulfo Martínez-Torres
Feb 8, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Amanda K PowersJoshua B Gross
May 22, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Marina YoffeDaphne Soares
Dec 2, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Johanna E KowalkoNicolas Rohner
Dec 4, 2020·Nature·Lukas AnneserErin M Schuman
Jul 7, 2021·Zebrafish·Sibylle SabrautzkiMarkus Brielmeier
Oct 12, 2021·PLoS Biology·Dimitri A SkandalisJames C Liao

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