Discovery of two new astyanax cavefish localities leads to further understanding of the species biogeography
Por:
Espinasa, Luis, Ornelas-Garcia, Claudia Patricia, Legendre, Laurent, Retaux, Sylvie, Best, Alexandra, Gamboa-Miranda, Ramses, Espinosa-Perez, Hector, Sprouse, Peter
Publicada:
1 ene 2020
Resumen:
The Astyanax species complex has two morphs: a blind, depigmented morph which inhabits caves in México and an eyed, pigmented surface-dwelling morph. The eyed morph can also be found in a few caves, sometimes hybridizing with the cave morph. This species complex has arguably become the most prominent model system among cave organisms for the study of evolutionary development and genomics. Before this study, 32 caves were known to be inhabited by the cave morph, 30 of them within the El Abra region. The purpose of this study was to conduct new surveys of the area and to assess some unconfirmed reports of caves presumably inhabited by troglomorphic fish. We describe two new localities, Sótano del Toro #2 and Sótano de La Calera. These two caves comprise a single hydrologic system together with the previously described cave of Sótano del Toro. The system is inhabited by a mixed population of troglomorphic, epigeomorphic, and presumably hybrid fish. Furthermore, Astyanax cavefish and the mysid shrimp Spelaeomysis quinterensis show a phylogeographic convergence that supports the notion that the central Sierra de El Abra is a biogeographical region that has influenced the evolutionary history of its aquatic community across species. The presumptive location of the boundaries of this biogeographical region are identified. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Filiaciones:
School of Science, Marist College, 3399 North Rd, Poughkeepsie, NY 12601, United States
Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Tercer Circuito Exterior S/N, Mexico City, CP 045110, Mexico
UMR 9191 EGCE, CNRS, IRD, Université Paris-Saclay, Gif-sur-Yvette, 91198, France
Equipe Développement Evolution du Cerveau Antérieur, Paris-Saclay Institute of Neuroscience, CNRS and University Paris-Sud and Paris-Saclay, Gif-sur-Yvette, 91198, France
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico
Zara Environmental LLC, Manchaca, TX 78652, United States
Marist Coll, Sch Sci, 3399 North Rd, Poughkeepsie, NY 12601 USA
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Tercer Circuito Exterior S-N, Mexico City 045110, DF, Mexico
Univ Paris Saclay, UMR EGCE 9191, CNRS, IRD, F-91198 Gif Sur Yvette, France
CNRS, Paris Saclay Inst Neurosci, Equipe Dev Evolut Cerveau Anterieur, F-91198 Gif Sur Yvette, France
Univ Paris Sud, F-91198 Gif Sur Yvette, France
Paris Saclay, F-91198 Gif Sur Yvette, France
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico
Zara Environm LLC, Manchaca, TX 78652 USA
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