Differential population history in the migratory catfishes Brachyplatystoma flavicans and Pseudoplatystoma fasciatum (Pimelodidae) from the Bolivian Amazon assessed with nuclear and mitochondrial DNA markers
Journal of fish biology vol:65 issue:3 pages:859-868
The catfishes Brachyplatystoma flavicans (n = 49) and Pseudoplatysoma 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: pi = 0.034-0.092 and five haplotypes: pi = 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. (C) 2004 The Fisheries Society of the British Isles.