Abstract
Records of sympatry between Alouatta caraya and A. clamitans are rare despite their extensive range overlap. An example of their current sympatry and the rediscovery of free-ranging potential hybrids of A. caraya and A. clamitans in the forests of the Upper Paraná River, Southern Brazil, are reported in this paper. Eight groups were observed in the study area: five monospecific groups of A. caraya, two of A. clamitans, and a group containing two adult males and two adult females of A. caraya and a sub-adult male and two adult females identified as Alouatta sp. The color of the last three individuals was a mosaic between the two species; this is consistent with previously described variations in museum specimens collected in the Paraná River in the 1940s that had been identified as potential hybrids. The results from this study emphasize the need for scientific studies in the region of the Ilha Grande National Park, one of the few regions in the Paraná River that currently harbors both howler species.
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Acknowledgments
We thank Marcelo Brunning, Rodrigo F. Moro-Rios, Gabriela Ludwig, Eduardo Carrano, Marcio R. Pie, APA das Ilhas e Várzeas do Rio Paraná, APA Municipal de Alto Paraíso, Parque Nacional de Ilha Grande, Universidade Federal do Paraná, Conselho Nacional de Pesquisa e Desenvolvimento Tecnológico (CNPq). Dr Jean P. Boubli and two other reviewers provided helpful comments on the manuscript. Contract grant sponsor: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).
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Contribution number 1637 of the Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531-980, Curitiba, Paraná, Brasil.
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Aguiar, L.M., Mellek, D.M., Abreu, K.C. et al. Sympatry between Alouatta caraya and Alouatta clamitans and the rediscovery of free-ranging potential hybrids in Southern Brazil. Primates 48, 245–248 (2007). https://doi.org/10.1007/s10329-007-0039-0
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DOI: https://doi.org/10.1007/s10329-007-0039-0