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Ochoa LE, Pereira LH, Costa-Silva GJ, et al. Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation. Ecol Evol. 2015;5(10):2005-20doi: 10.1002/ece3.1486.
Ochoa, L. E., Pereira, L. H., Costa-Silva, G. J., Roxo, F. F., Batista, J. S., Formiga, K., Foresti, F., & Oliveira, C. (2015). Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation. Ecology and evolution, 5(10), 2005-20. https://doi.org/10.1002/ece3.1486
Ochoa, Luz Eneida, et al. "Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation." Ecology and evolution vol. 5,10 (2015): 2005-20. doi: https://doi.org/10.1002/ece3.1486
Ochoa LE, Pereira LH, Costa-Silva GJ, Roxo FF, Batista JS, Formiga K, Foresti F, Oliveira C. Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation. Ecol Evol. 2015 May;5(10):2005-20. doi: 10.1002/ece3.1486. Epub 2015 Apr 22. PMID: 26045952; PMCID: PMC4449755.
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Ecol Evol. 2015 May;5(10):2005-20. doi: 10.1002/ece3.1486. Epub 2015 Apr 22.

Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation.

Ecology and evolution

Luz Eneida Ochoa, Luiz Henrique G Pereira, Guilherme Jose Costa-Silva, Fábio F Roxo, Jacqueline S Batista, Kyara Formiga, Fausto Foresti, Claudio Oliveira

Affiliations

  1. Departamento de Morfologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista São Paulo, Brazil.
  2. Centro Interdisciplinar de Ciências da Vida, Universidade Federal da Integração Latino Americana Foz do Iguaçu, Brazil.
  3. Laboratório Temático de Biologia Molecular, Instituto Nacional de Pesquisa da Amazônia Manaus, Brazil.

PMID: 26045952 PMCID: PMC4449755 DOI: 10.1002/ece3.1486

Abstract

Brachyplatystoma platynemum is a catfish species widely distributed in the Amazon basin. Despite being considered of little commercial interest, the decline in other fish populations has contributed to the increase in the catches of this species. The structure, population genetic variability, and evolutionary process that have driven the diversification of this species are presently unknown. Considering that, in order to better understand the genetic structure of this species, we analyzed individuals from seven locations of the Amazon basin using eight molecular markers: control region and cytochrome b mtDNA sequences, and a set of six nuclear microsatellite loci. The results show high levels of haplotype diversity and point to the occurrence of two structured populations (Amazon River and the Madeira River) with high values for F ST. Divergence time estimates based on mtDNA indicated that these populations diverged about 1.0 Mya (0.2-2.5 Mya 95% HPD) using cytochrome b and 1.4 Mya (0.2-2.7 Mya 95% HPD) using control region. During that time, the influence of climate changes and hydrological events such as sea level oscillations and drainage isolation as a result of geological processes in the Pleistocene may have contributed to the current structure of B. platynemum populations, as well as of differences in water chemistry in Madeira River. The strong genetic structure and the time of genetic divergence estimated for the groups may indicate the existence of strong structure populations of B. platynemum in the Amazon basin.

Keywords: Biodiversity; Madeira River; Neotropical fishes; climate oscillation; marine transgression; phylogeography

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