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Genetic diversity and genetic structure of an endemic Mexican Dusky Rattlesnake (Crotalus triseriatus) in a highly modified agricultural landscape: implications for conservation

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Abstract

It is necessary to determine genetic diversity of fragmented populations in highly modified landscapes to understand how populations respond to land-use change. This information will help guide future conservation and management strategies. We conducted a population genetic study on an endemic Mexican Dusky Rattlesnake (Crotalus triseriatus) in a highly modified landscape near the Toluca metropolitan area, in order to provide crucial information for the conservation of this species. There was medium levels of genetic diversity, with a few alleles and genotypes. We identified three genetically differentiated clusters, likely as a result of different habitat cover type. We also found evidence of an ancestral genetic bottleneck and medium values of effective population size. Inbreeding coefficients were low and there was a moderate gene flow. Our results can be used as a basis for future research and C. triseriatus conservation efforts, particularly considering that the Trans-Mexican Volcanic Belt is heavily impacted by destructive land-use practices.

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Acknowledgments

We thank the following people for their help with field work: Andrea González-Fernández, Juan Carlos Guido-Patiño, Víctor Muñoz-Mora, Giovany Arturo González-Desales and Carlos Reyna-Valencia. We thank Víctor Ávila Akerberg for valuable comments and English editing. We thank the editor and two anonymous reviewers for their comments. AS is grateful to the graduate program “Ciencias Agropecuarias y Recursos Naturales” of the Autonomous University of the State of Mexico and for scholarships received from CONACYT (356612) and COMECYT.

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  1. Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto literario # 100, Colonia Centro, CP 50000, Toluca, Estado de México, Mexico

    Armando Sunny, Octavio Monroy-Vilchis & Martha M. Zarco-González

  2. Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana Xochimilco, Calz. Del Hueso 1100, 04960, Col. Villa Quietud, Mexico

    Germán David Mendoza-Martínez & Daniel Martínez-Gómez

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Sunny, A., Monroy-Vilchis, O., Zarco-González, M.M. et al. Genetic diversity and genetic structure of an endemic Mexican Dusky Rattlesnake (Crotalus triseriatus) in a highly modified agricultural landscape: implications for conservation. Genetica 143, 705–716 (2015). https://doi.org/10.1007/s10709-015-9868-8

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