Isolation and characterization of microsatellites loci for “piramutaba” (Brachyplatystoma vaillantii, Siluriformes: Pimelodidae), one of the commercially most important migratory catfishes in the Amazon Basin

  • Fabiola C. Rodrigues
  • Izeni P. FariasEmail author
  • Jacqueline S. Batista
  • José Alves-Gomes
Technical Note


The piramutaba (Brachyplatystoma vaillantii) is one of the largest and most important migratory catfishes of the Amazon Basin. Due to its historical commercial importance, this species is now considered overfished. Fifteen polymorphic microsatellite markers were characterized in order to be used as tools to address aspects of the biology and conservation of this species. The number of alleles varied from 4 to 26 per locus, with an average of 11.33 alleles per locus, in 36–48 individuals tested. The observed and expected heterozygosities varied from 0.30176 to 0.95281, and from 0.25532 to 0.97778, respectively. All the microsatellites were found to be in Hardy–Weinberg equilibrium, and no linkage disequilibrium was observed. The transferability of these markers was tested in others Brachyplatystoma with seven to 12 loci being polymorphic per species. The results indicate that these markers are adequate for genetic studies applied to the management and conservation of the piramutaba, and others Brachyplatystoma species.


Piramutaba Microsatellites Brachyplatystoma vaillantii Migratory catfish Amazon 



This research was supported by grants from CNPq/PPG-7 (557090/05) to I.P.F., FAPEAM (903/03) to J.A.A.G. and CNPq/CT Amazônia (554054/06-0) to J.S.B. Permission to conduct fieldwork and collect tissue samples was granted by IBAMA (Licença no. 14278-1 and no. 130). The authors would like to especially thank Kyara Formiga for her crucial help during several phases of this project. The Projeto Pirada (LTBM/INPA) provided samples and support in the laboratory. We are grateful to Tomas Hrbek for technical assistance and manuscript review. This study forms a portion of a dissertation of F.C.R. at the Genética, Conservação e Biologia Evolutiva program of INPA. F.C.R. was supported by a fellowship from CAPES/FAPEAM.


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Fabiola C. Rodrigues
    • 1
  • Izeni P. Farias
    • 2
    Email author
  • Jacqueline S. Batista
    • 1
    • 3
  • José Alves-Gomes
    • 1
    • 3
  1. 1.Laboratório Temático de Biologia Molecular (LTBM)Instituto Nacional de Pesquisas da AmazôniaManausBrazil
  2. 2.Laboratório de Evolução e Genética Animal, Departamento de BiologiaUniversidade Federal do AmazonasManausBrazil
  3. 3.Coordenação de Pesquisas em Biologia Aquática, Laboratório de Fisiologia Comportamental e Evolução (LFCE)Instituto Nacional de Pesquisas da AmazôniaManausBrazil

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