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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/128623
Title: 
Genetic structure and historical diversification of catfish Brachyplatystoma platynemum (Siluriformes: Pimelodidae) in the Amazon basin with implications for its conservation
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Universidade Federal da Integração Latino Americana Integração Latino Americana
  • Nacional de Pesquisa da Amazônia
ISSN: 
2045-7758
Sponsorship: 
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Santo Antonio Energia S/A
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Sponsorship Process Number: 
  • FAPESP: 2014/06853-8
  • FAPESP: 2014/05051-5
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 1.0Mya (0.2-2.5Mya 95% HPD) using cytochrome b and 1.4Mya (0.2-2.7Mya 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.
Issue Date: 
1-May-2015
Citation: 
Ecology And Evolution. Hoboken: Wiley-blackwell, v. 5, n. 10, p. 2005-2020, 2015.
Time Duration: 
2005-2020
Publisher: 
Wiley-Blackwell
Keywords: 
  • Biodiversity
  • climate oscillation
  • Madeira River
  • marine transgression
  • Neotropical fishes
  • phylogeography
Source: 
http://onlinelibrary.wiley.com/doi/10.1002/ece3.1486/full
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/128623
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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