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Chapitre D'ouvrage Année : 2015

Neural Development and Evolution in Astyanax mexicanus: Comparing Cavefish and Surface Fish Brains

Résumé

Astyanax cavefish are fascinating animals that have survived in the dark over evolutionary times. Beyond their spectacular loss of eyes, their nervous system has undergone many significant changes that affect their behavior. Here, we review current knowledge on the early embryonic and larval mechanisms underlying developmental evolution of the cavefish brain and sensory systems, and which mainly lead to subtle variations in the size of brain regions or in the number of neurons. We also review recent data showing major modifications of brain neurochemistry in cavefish, which are due to mutations in genes controlling neuromodulatory transmitter balance. Globally, a picture emerges to start explaining the developmental and molecular mechanisms of cavefish behavioral adaptation.
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hal-01307734 , version 1 (26-04-2016)

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Sylvie Rétaux, Alexandre Alié, Maryline Blin, Lucie Devos, Yannick Elipot, et al.. Neural Development and Evolution in Astyanax mexicanus: Comparing Cavefish and Surface Fish Brains. Alex Keene, Masato Yoshizawa and Suzanne McGaugh. Biology and Evolution of the Mexican Cavefish, Academic Press / Elsevier, chapter 12 - pp 227-244, 2015, 978-0-12-802148-4. ⟨10.1016/B978-0-12-802148-4.00012-8⟩. ⟨hal-01307734⟩
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