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Montevideo, Uruguay

Gonzalez S.,Genetica de la Conservacion | Cosse M.,Genetica de la Conservacion | Del Rosario Franco M.,Genetica de la Conservacion | Emmons L.,Smithsonian Institution | And 5 more authors.
Journal of Heredity | Year: 2015

The maned wolf (Chrysocyon brachyurus) is one of the largest South American canids, and conservation across this charismatic carnivore's large range is presently hampered by a lack of knowledge about possible natural subdivisions which could influence the population's viability. To elucidate the phylogeographic patterns and demographic history of the species, we used 2 mtDNA markers (D-loop and cytochrome b) from 87 individuals collected throughout their range, in Argentina, Bolivia, Brazil, and Uruguay. We found moderate levels of haplotype and nucleotide diversity, and the 14 D-loop haplotypes were closely related. Genetic structure results revealed 4 groups, and when coupled with model inferences from a coalescent analysis, suggested that maned wolves have undergone demographic fluctuations due to changes in climate and habitat during the Pleistocene glaciation period approximately 24000 years before present (YBP). This genetic signature points to an event that occurred within the timing estimated for the start of the contraction of the Cerrado around 50000 YBP. Our results reveal a genetic signature of population size expansion followed by contraction during Pleistocene interglaciations, which had similar impacts on other South American mammals. The 4 groups should for now be considered management units, within which future monitoring efforts should be conducted independently. © 2015 The American Genetic Association 2015. All rights reserved. Source


Abril V.V.,Sao Paulo State University | Carnelossi E.A.G.,Sao Paulo State University | Gonzalez S.,Genetica de la Conservacion | Duarte J.M.B.,Sao Paulo State University
Cytogenetic and Genome Research | Year: 2010

The red brocket deer Mazama americana is a neotropical species that exhibits extensive karyotype variation under an unvarying morphotype. In order to deduce red brocket deer genetic units for conservation, gene flow between populations, and genetic variation, we initiated a cytogenetic and molecular genetic study based on representative samples from throughout their Brazilian geographic range. These data represent the first cytotaxonomical and molecular systematics, and although sample sizes are limited, our results clearly suggest that red brocket deer populations are significantly differentiated with respect to karyotypes and the mitochondrial sequences analyzed. We clearly recognized 2 independent species, and we will be focusing further research in analyzing the meiotic dynamic to determine the existence of other evolutionarily significant units under the red brocket complex. Copyright © 2010 S. Karger AG, Basel. Source

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