| Title: |
Diversity of Olfactory Responses and Skills in Astyanax Mexicanus Cavefish Populations Inhabiting different Caves |
| Authors: |
Maryline Blin, Julien Fumey, Camille Lejeune, Maxime Policarpo, Julien Leclercq, Stéphane Père, Jorge Torres-Paz, Constance Pierre, Boudjema Imarazene, Sylvie Rétaux |
| Source: |
Diversity, Vol 12, Iss 10, p 395 (2020) |
| Publisher Information: |
MDPI AG, 2020. |
| Publication Year: |
2020 |
| Collection: |
LCC:Biology (General) |
| Subject Terms: |
fieldwork, wild fish, comparative biology, behavior, troglomorphism, olfactory test, Biology (General), QH301-705.5 |
| More Details: |
Animals in many phyla are adapted to and thrive in the constant darkness of subterranean environments. To do so, cave animals have presumably evolved mechano- and chemosensory compensations to the loss of vision, as is the case for the blind characiform cavefish, Astyanax mexicanus. Here, we systematically assessed the olfactory capacities of cavefish and surface fish of this species in the lab as well as in the wild, in five different caves in northeastern Mexico, using an olfactory setup specially developed to test and record olfactory responses during fieldwork. Overall cavefish showed lower (i.e., better) olfactory detection thresholds than surface fish. However, wild adult cavefish from the Pachón, Sabinos, Tinaja, Chica and Subterráneo caves showed highly variable responses to the three different odorant molecules they were exposed to. Pachón and Subterráneo cavefish showed the highest olfactory capacities, and Chica cavefish showed no response to the odors presented. We discuss these data with regard to the environmental conditions in which these different cavefish populations live. Our experiments in natural settings document the diversity of cave environments inhabited by a single species of cavefish, A. mexicanus, and highlight the complexity of the plastic and genetic mechanisms that underlie cave adaptation. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1424-2818 |
| Relation: |
https://www.mdpi.com/1424-2818/12/10/395; https://doaj.org/toc/1424-2818 |
| DOI: |
10.3390/d12100395 |
| Access URL: |
https://doaj.org/article/7f57acfef3d942ec882b480680318349 |
| Accession Number: |
edsdoj.7f57acfef3d942ec882b480680318349 |
| Database: |
Directory of Open Access Journals |
