733. Pelster, B., Wood, C.M., Braz-Mota, S. and Val, A.L. (2020). Gills and air-breathing organ in O2 uptake, CO2 excretion, N-waste excretion, and ionoregulation in small and large pirarucu (Arapaima gigas). J. Comp. Physiol. B. https://doi.org/10.1007/s00360-020-01286-1 PDF