Variation of 18S rDNA (green signal) and 5S rDNA (red signal) chromosomal sites among Pimelodus blochii populations from Amazon basin. The samples from Amazonas River showed two distinct patterns: one observed in the Almeirim population (A) and other observed in the Santarém population (B).

 
 
  Part of: Fonseca IC, Maciel LAM, Ribeiro FRV, Rodrigues LRR (2018) Karyotypic variation in the long-whiskered catfish Pimelodus blochii Valenciennes, 1840 (Siluriformes, Pimelodidae) from the lower Tapajós, Amazonas and Trombetas Rivers. Comparative Cytogenetics 12(3): 285-298. https://doi.org/10.3897/CompCytogen.v12i3.22590