Data from: Evolution in extreme environments: replicated phenotypic differentiation in livebearing fish inhabiting sulfidic springs
| Main Authors: | Tobler, Michael, Palacios, Maura, Chapman, Lauren J, Mitrofanov, Igor, Bierbach, David, Plath, Martin, Arias-Rodriguez, Lenin, García De León, Francisco J, Mateos, Mariana |
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| Format: | info dataset Journal |
| Terbitan: |
, 2011
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4953898 |
Daftar Isi:
- We investigated replicated ecological speciation in the livebearing fishes Poecilia mexicana and P. sulphuraria (Poeciliidae), which inhabit freshwater habitats and have also colonized multiple sulfidic springs in southern Mexico. These springs exhibit extreme hypoxia and high concentrations of hydrogen sulfide, which is lethal to most metazoans. We used phylogenetic analyses to test whether springs were independently colonized, performed phenotypic assessments of body and gill morphology variation to identify convergent patterns of trait differentiation, and conducted an eco-toxicological experiment to detect differences in sulfide tolerances among ecotypes. Our results indicate that sulfidic springs were colonized by three different lineages, two within P. mexicana and one representing P. sulphuraria. Colonization occurred earlier in P. sulphuraria, whereas invasion of sulfidic springs in P. mexicana was more recent, such that each population is more closely related to neighboring populations from adjacent non-sulfidic habitats. Sulfide spring fish also show divergence from non-sulfidic phenotypes and a phenotypic convergence towards larger heads, larger gills, and increased tolerance to H2S. Together with previous studies that indicated significant reproductive isolation between fish from sulfidic and non-sulfidic habitats, this study provides evidence for repeated ecological speciation in the independent sulfide spring populations of P. mexicana and P. sulphuraria.
- Tobler_etal_gillmorphometricsGill morphometric data for fish from sulfidic and non-sulfidic habitats, including total gill filament number (TFN), average filament length (AFL), total gill filament length (TGFL), total hemibranch perimeter (THP), total hemibranch area (THA), and body mass (M).Tobler_etal_bodymorphometricsLandmark coordinates for Poecilia mexicana and Poecilia sulphuraria from sulfidic and non-sulfidic habitatsTobler_etal_toleranceSulfide tolerance in Poecilia mexicana and P. sulphuraria from sulfidic and non-sulfidic habitats.