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Title: | Genetic differentiation and gene flow of the Amazonian catfish Pseudoplatystoma punctifer across the Madeira River rapids prior to the construction of hydroelectric dams |
Authors: | Batista, Jacqueline da Silva Formiga, Kyara Gomes, J. A Alves Escobar, Maria Doris Hrbek, Tomas Farias, Izeni P. Machado, Antônio Saulo Cunha |
Keywords: | Conservation in the Amazon Microsatellite |
Issue Date: | 2021 |
metadata.dc.publisher.journal: | Hydrobiologia |
Abstract: | The large catfish Pseudoplatystoma punctifer plays an important role as a top predator in the Amazonian Basin ecosystem. The Madeira River is the largest tributary of the Amazon River marked by a series of rapids and waterfalls. Between 2011 and 2012 some of the rapids were submerged by two hydroelectric dams. Upstream and downstream of the rapids are two sub-basins Mamoré/Guaporé and lower Madeira, respectively. Using mitochondrial and microsatellite markers, we estimated genetic diversity, genetic differentiation, and gene flow between sub-basins and tested if the rapids functioned as barriers limiting the gene flow for this species of catfish. We identified three population clusters, one representing the individuals from the Mamoré/Guaporé sub-basin (upstream) and the other two representing the individuals from the lower Madeira sub-basin (downstream). The rapids restricted but did not block gene flow, which corroborates a clinal pattern of genetic differentiation. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG. |
metadata.dc.identifier.doi: | 10.1007/s10750-021-04705-8 |
Appears in Collections: | Artigos |
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