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Landscape genetics of mountain lions (Puma concolor) in southern Brazil

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Abstract

It is suggested that mountain lions have suffered a bottleneck and lost their genetic diversity in an area in southern Brazil. In this study, we correlated landscape connectivity and patterns of gene flow to identify landscape permeability and possible sources of migrants for the population of mountain lions in southern Brazil, using circuit theory. Population structure was analyzed with Bayesian methods, and density and parentage relationships were also estimated, to evaluate the population genetic profile. We did not find genetic structure between samples, and landscape analysis indicated that all individuals were connected by areas that are permeable to mountain lion movements. The estimated population density was low, 0.09 and 0.32 mountain lions/100 km 2 (Ne / N = 0.11 and Ne / N = 0.4, respectively). Parentage results indicated that individuals killed in the same spot were not related, suggesting that mountain lions are still able to disperse through the landscape. Evidence indicates that severe habitat loss and consequent illegal hunting were responsible for a bottleneck and consequent loss of genetic variability, we demonstrated that the landscape still allows mountain lions to move, and that protected areas in southern Brazil may be acting as a source of migrants. This information indicates that conservation actions to reduce illegal hunting and to monitor protected areas are important to understand the impact of hunted areas on source areas.

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Authors and Affiliations

  1. Departamento de Genética, Universidade Federal do Rio Grande do Sul, cx postal 15053, CEP 91501-970, Porto Alegre, RS, Brazil

    Camila Schlieper Castilho & Thales O. Freitas

  2. Instituto Serrano de Conservação da Natureza, cx postal 33, CEP 88650-000, Urubici, SC, Brazil

    Camila Schlieper Castilho & Luiz G. Marins-Sá

  3. Projeto Puma, CEP 88504-302, Lages, SC, Brazil

    Rodrigo C. Benedet

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  1. Camila Schlieper Castilho
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  2. Luiz G. Marins-Sá
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  4. Thales O. Freitas
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Correspondence to Camila Schlieper Castilho.

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Castilho, C.S., Marins-Sá, L.G., Benedet, R.C. et al. Landscape genetics of mountain lions (Puma concolor) in southern Brazil. Mamm Biol 76, 476–483 (2011). https://doi.org/10.1016/j.mambio.2010.08.002

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