Journal Article

Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale

Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M.

Record Number:
4545
Year:
2020
Journal:
bioRxiv preprint
Abstract:
Across various animal groups, adaptation to the extreme conditions of cave environments has resulted in convergent evolution of morphological, physiological, and behavioral traits. We document a Neotropical cave fish system with ample potential to study questions related to convergent adaptation to cave environments at the population level. In the karstic region of the Andes of Santander, Colombia, cave-dwelling catfishes in the genus Trichomycterus exhibit variable levels of reduction of eyes and body pigmentation relative to surface congeners. 20 We tested whether cave-dwelling, eye reduced, depigmented Trichomycterus from separate caves in Santander were the result of a single event of cave colonization and subsequent dispersal, or of multiple colonizations to caves by surface ancestors followed by phenotypic convergence. Using mitochondrial DNA sequences to reconstruct phylogenetic relationships of Trichomycterus from Santander, we found that caves in this region have been colonized independently by two separate clades. Additional events of cave colonization -and possibly 25 recolonization of surface streams- may have occurred in one of the clades, where surface and cave-dwelling populations exhibit shallow mtDNA differentiation, suggesting recent divergence or divergence in the face of gene flow. We also identified various taxonomic challenges including both a considerable number of potentially undescribed species and likely problems with the circumscription of named taxa. The system appears especially promising for studies on a wide range of ecological and evolutionary questions. 30 Keywords: adaptation, Andes, Colombia, freshwater fish, karstic, Neotropics, phylogeny.
Times Cited:
10
Related Records:
Sket, B. (1988)
Speleobiological investigations in the Colombian Andes 1984
Sket, B. (1988)
Speleobiological investigations in the Colombian Andes 1984
Sket, B. (1988)
Speleobiological investigations in the Colombian Andes 1984
Ardila Rodríguez, CA (2006)
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Ardila Rodríguez, CA (2006)
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Castellanos-Morales, CA (2007)
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Checklist of the freshwater fishes of Colombia: a Darwin Core alternative to the updating problem
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Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
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A new troglomorphic species of Trichomycterus (Siluriformes: Trichomycteridae) from northeastern Colombia, with proposal of a new Trichomycterus subclade and remarks on some nominal species from Colombia
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. (2020)
Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale