Genetic differentiation and gene flow of the Amazonian catfish Pseudoplatystoma punctifer across the Madeira River rapids prior to the construction of hydroelectric dams

Autor: Jacqueline da Silva Batista, Antônio Saulo Cunha-Machado, José Antônio Alves-Gomes, Izeni Pires Farias, Tomas Hrbek, Kyara Martins Formiga, Maria Doris Escobar
Rok vydání: 2021
Předmět:
Zdroj: Hydrobiologia. 849:29-46
ISSN: 1573-5117
0018-8158
DOI: 10.1007/s10750-021-04705-8
Popis: 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 Mamore/Guapore 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 Mamore/Guapore 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.
Databáze: OpenAIRE
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