Environmental Biology of Fishes

, Volume 82, Issue 1, pp 101–108

A new and morphologically distinct population of cavernicolous Poecilia mexicana (Poeciliidae: Teleostei)

  • M. Tobler
  • R. Riesch
  • F. J. García de León
  • I. Schlupp
  • M. Plath
Article

Abstract

The cave molly, Poecilia mexicana, from the Cueva del Azufre, a sulfur cave in Tabasco, Mexico, ranks among the best-studied cave fishes worldwide, despite being known from a single population only. Here we describe a newly discovered second population of cave-dwelling P. mexicana from a nearby, but mostly non-sulfidic cave (Luna Azufre). Despite apparent similarities between the two populations (such as reduced eye diameter and reduced pigmentation), a geometric morphometric analysis revealed pronounced morphological differentiation between the two cave forms.

Keywords

Cave fish Cave molly Extremophile Hydrogen sulfide Regressive evolution Ecological diversification 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • M. Tobler
    • 1
    • 2
  • R. Riesch
    • 2
  • F. J. García de León
    • 3
  • I. Schlupp
    • 2
  • M. Plath
    • 2
    • 4
  1. 1.Zoologisches InstitutUniversität ZürichZurichSwitzerland
  2. 2.Department of ZoologyUniversity of OklahomaNormanUSA
  3. 3.Centro de Investigaciones Biológicas del NoroesteLa PazMexico
  4. 4.Institut für Biochemie/Biologie, Abteilung für Evolutionsbiologie/Spezielle ZoologieUniversität PotsdamPotsdamGermany

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