Orbe, R.A.I. et al. 2003. Ammonia excretion by tambaqui (Colossoma macropomum) related to water temperature and fish mass. Pesquisa Agropecuaria Brasileira. 38, 10 (Oct. 2003), 1243–1247. DOI:https://doi.org/10.1590/S1678-3921.pab2003.v38.6696.