Interspecific Variation in the Repair of UV Damaged DNA in the GenusXiphophorusas a Factor in the Decline of the Rio Grande Platyfish
| Autor: | André A. Fernandez, Kevin Lin, David L. Mitchell, Lakshmi Paniker |
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| Rok vydání: | 2014 |
| Předmět: |
DNA Repair
Ultraviolet Rays Range (biology) Gene Expression Radiation Dosage Biochemistry Cyprinodontiformes Monophyly Rivers Genus Temperate climate Animals IUCN Red List Ozone Depletion Physical and Theoretical Chemistry Southern platyfish Phylogeny Geography biology Ecology Endangered Species Genetic Variation DNA General Medicine Interspecific competition Xiphophorus biology.organism_classification DNA Repair Enzymes DNA Damage |
| Zdroj: | Photochemistry and Photobiology. 91:486-492 |
| ISSN: | 0031-8655 |
| Popis: | The fish genus Xiphophorus consists of 26 species distributed along the eastern slopes of mountain ranges extending from northern Mexico to Belize and Nicaragua. We analyzed light-dependent repair of UV-induced DNA damage in at least two species from each of the four monophyletic Xiphophorus groups. We found that the northern platyfish had significantly reduced photoenzymatic repair compared to the other three groups, including the northern swordtails, southern platyfish and southern swordtails. All of the species of the northern platyfish, including the Marbled (meyeri), Northern (gordoni) and Monterrey Platyfish (couchianus) are the northernmost species in the genus and are the only three species in the genus that are currently found on the IUCN Red List of Threatened Species. Satellite data from the past 30 years (1979-2008) correlate greater increases in shorter wavelength UVB with higher latitudes within the Xiphophorus range. We suggest that, combined with other consequences of human population growth, anthropogenic deozonation resulting in a disproportionate increase in UVB in temperate latitudes may be a contributing factor in the decline and extirpation of the northern platyfish. |
| Databáze: | OpenAIRE |
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