A New Blind Cave Fish Population of Genus Astyanax: Geography, Morphology and Behavior

@article{Espinasa2004ANB,
  title={A New Blind Cave Fish Population of Genus Astyanax: Geography, Morphology and Behavior},
  author={Luis Espinasa and Patricia Rivas-Manzano and H{\'e}ctor Espinosa P{\'e}rez},
  journal={Environmental Biology of Fishes},
  year={2004},
  volume={62},
  pages={339-344}
}
A new population of blind, cave dwelling tetra fish of the genus Astyanax was discovered in Granadas Cave, in the Balsas drainage, southern México. All blind Mexican tetras previously described are from Tampico and San Luis Potosí, northern México. The discovery of a new blind morph thus represents an independent colonization and convergent adaptation to the cave environment by this fish. Individuals of this population display variability of their troglomorphic features. Some individuals… 
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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.
Evidence for multiple genetic forms with similar eyeless phenotypes in the blind cavefish, Astyanax mexicanus.
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An analysis of variation in the mitochondrial NADH dehydrogenase 2 (ND2) gene among different surface fish and cavefish populations identifies a minimum of two genetically distinctive cavefish lineages with similar eyeless phenotypes.
The rise of Astyanax cavefish
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The rise of this model system from its discovery by a Mexican surveyor in 1936 to a powerful system for cave biology and contemporary genetic research is documented, which has provided insight to the mechanisms of phenotypic regression, the genetic basis for constructive trait evolution, and the origin of behavioral novelties.
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Integration of morphology, phylogeny and geography suggests Sinocyclocheilus fishes are pre-adapted for cave dwelling, and the Astyanax model system is indicated to be an invaluable model system to explore evolutionary novelty.
Female mating preferences in blind cave tetras Astyanax fasciatus (Characidae, Teleostei)
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The evolution of the female preference for large male body size within different populations of this species, either surface- or cave-dwelling, is examined.
Contrasting feeding habits of post-larval and adult Astyanax cavefish
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The data is discussed with regards to the current developmental and genetic understanding of cavefish morphological and behavioural evolution, particularly regarding its enhanced Vibration Attraction Behaviour (VAB).
Regressive evolution in Astyanax cavefish.
TLDR
Recent advances in Astyanax development and genetics have revealed some of the molecular and cellular mechanisms involved in trait modification, the number and identity of the underlying genes and mutations, the molecular basis of parallel evolution, and the evolutionary forces driving adaptation to the cave environment.
Adaptive evolution of eye degeneration in the Mexican blind cavefish.
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It is concluded that eye degeneration in cavefish may be caused by adaptive evolution and pleiotropy, and a key discovery is that Hedgehog midline signaling is expanded and inhibits eye formation by inducing lens apoptosis in Cavefish embryos.
The end of regressive evolution: examining and interpreting the evidence from cave fishes.
TLDR
It is argued that evolution of hypogean fauna can be explained by well-known mechanisms within the current context of evolutionary biology.
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