The average TAN excretion rate determined in the excretionexperiment portion of the study falls within the range of excretionrates determined in previous studies (Table 1), and is slightly higherthan the rates given by Srna and Baggaley (1976) and Hammen(1968) in laboratory studies, and lower than the rates given byDame et al. (1992) and Pietros and Rice (2003), which were field andmesocosm experiments, respectively. This suggests that triploidoysters in culture regenerate available nitrogen to the water col-umn, at rates in the range of wild diploid oysters. Future modelingstudies should be able to expect that the excretion by triploidoysters in aquaculture facilities affect water chemistry similarly tothose in natural and restored reefs.