Jorge S. CoronelGregory E. MaesS. C. ClausPaul A. Van DammeF.A.M. Volckaert2026-03-222026-03-22200410.1111/j.0022-1112.2004.00498.xhttps://doi.org/10.1111/j.0022-1112.2004.00498.xhttps://andeanlibrary.org/handle/123456789/47350Citaciones: 22The catfishes Brachyplatystoma flavicans ( n = 49) and Pseudoplatystoma fasciatum ( n = 69) showed comparable low allozyme diversities ( H e = 0·012 and 0·009–0·028, respectively), but contrasting PCR‐RFLP restriction site mitochondrial DNA diversities (three haplotypes: π = 0·034–0·092 and five haplotypes: π = 0·001–0·023, respectively) in the Rio Ichilo and Beni (Bolivia). Genetic homogeneity between samples was high for B. flavicans and lower for P. fasciatum . Based on mitochondrial diversity, both species probably experienced a historic population reduction but at different time scales.enBiologyMitochondrial DNAHaplotypeZoologyPopulationAmazon rainforestEcologyarticle