Simões, K., Orsi, A.M., Schimming, B.C. and Benetti, E.J. 2017. Seasonal reproductive cycle and variability in plasma testosterone levels in the domestic duck (Anas platyrhynchos) . Bioscience Journal. 33, 1 (Feb. 2017), 153–164. DOI:https://doi.org/10.14393/BJ-v33n1a2017-34113.