Cargando…
Feed or fight: A behavioral shift in blind cavefish
Within the species Astyanax mexicanus, there are several inter-fertile populations of river-dwelling sighted fish and cave-dwelling blind fish which have evolved morphological and behavioral adaptations. We have recently reported a developmental and neurophysiological basis for the loss of aggressiv...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Landes Bioscience
2013
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3609845/ https://www.ncbi.nlm.nih.gov/pubmed/23749249 http://dx.doi.org/10.4161/cib.23166 |
_version_ | 1782264376774885376 |
---|---|
author | Rétaux, Sylvie Elipot, Yannick |
author_facet | Rétaux, Sylvie Elipot, Yannick |
author_sort | Rétaux, Sylvie |
collection | PubMed |
description | Within the species Astyanax mexicanus, there are several inter-fertile populations of river-dwelling sighted fish and cave-dwelling blind fish which have evolved morphological and behavioral adaptations. We have recently reported a developmental and neurophysiological basis for the loss of aggressive behavior in the blind cavefish morph of Astyanax. Using an appropriate behavioral assay, we have shown that surface Astyanax show intense dominance-related aggressiveness. The expression of this behavior is inversely correlated with the serotonin (5HT) levels in their hindbrain raphe nucleus. Moreover this behavior is not solely visually-evoked and has a genetic component. Conversely in cavefish, there is no raphe-driven dominance aggressiveness. Instead, the embryonic Sonic Hedgehog–dependent modification of the size of a serotonergic neuronal group localized in their hypothalamus causes a shift in their behavioral pattern: instead of fighting, they search for food. Here we further discuss the origin and nature of this behavioral shift. |
format | Online Article Text |
id | pubmed-3609845 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Landes Bioscience |
record_format | MEDLINE/PubMed |
spelling | pubmed-36098452013-06-07 Feed or fight: A behavioral shift in blind cavefish Rétaux, Sylvie Elipot, Yannick Commun Integr Biol Article Addendum Within the species Astyanax mexicanus, there are several inter-fertile populations of river-dwelling sighted fish and cave-dwelling blind fish which have evolved morphological and behavioral adaptations. We have recently reported a developmental and neurophysiological basis for the loss of aggressive behavior in the blind cavefish morph of Astyanax. Using an appropriate behavioral assay, we have shown that surface Astyanax show intense dominance-related aggressiveness. The expression of this behavior is inversely correlated with the serotonin (5HT) levels in their hindbrain raphe nucleus. Moreover this behavior is not solely visually-evoked and has a genetic component. Conversely in cavefish, there is no raphe-driven dominance aggressiveness. Instead, the embryonic Sonic Hedgehog–dependent modification of the size of a serotonergic neuronal group localized in their hypothalamus causes a shift in their behavioral pattern: instead of fighting, they search for food. Here we further discuss the origin and nature of this behavioral shift. Landes Bioscience 2013-03-01 /pmc/articles/PMC3609845/ /pubmed/23749249 http://dx.doi.org/10.4161/cib.23166 Text en Copyright © 2013 Landes Bioscience http://creativecommons.org/licenses/by-nc/3.0/ This is an open-access article licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. The article may be redistributed, reproduced, and reused for non-commercial purposes, provided the original source is properly cited. |
spellingShingle | Article Addendum Rétaux, Sylvie Elipot, Yannick Feed or fight: A behavioral shift in blind cavefish |
title | Feed or fight: A behavioral shift in blind cavefish |
title_full | Feed or fight: A behavioral shift in blind cavefish |
title_fullStr | Feed or fight: A behavioral shift in blind cavefish |
title_full_unstemmed | Feed or fight: A behavioral shift in blind cavefish |
title_short | Feed or fight: A behavioral shift in blind cavefish |
title_sort | feed or fight: a behavioral shift in blind cavefish |
topic | Article Addendum |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3609845/ https://www.ncbi.nlm.nih.gov/pubmed/23749249 http://dx.doi.org/10.4161/cib.23166 |
work_keys_str_mv | AT retauxsylvie feedorfightabehavioralshiftinblindcavefish AT elipotyannick feedorfightabehavioralshiftinblindcavefish |