2019. Qualitative semen parameters and comparative morphology of Pirapitinga (Piaractus brachypomus), Pacu (Piaractus mesopotamicus) and Tambaqui (Colossoma macropomum) sperm. Bulletin of Animal Husbandry. 76, (May 2019), 1–8. DOI:https://doi.org/10.17523/bia.2019.v76.e1437.