By L.A Kelly, A Bergheim, M.M Hennessy
Water Research, Volume 28, Issue 6, June 1994, Pages 1403-1405, ISSN 0043-1354, DOI: 10.1016/0043-1354(94)90307-7.

Production of total ammoniacal nitrogen (TAN = NH3 + NH4+) from juvenile Atlantic salmon (S. salar) farms is known to alter in response to various environmental cues; lifestage of the fish, water temperature, feeding rate and stress are some of the variables which affect positively the TAN production rate. Data reported in this paper are from three separate field investigations, carried out at six different commercially operated sites in Scotland and Norway over a period of 6 years. A simple, temperature dependent model of TAN production for a range of operating conditions is presented. This model has a low data requirement and may be used by water managers to predict TAN loads to the recipient water body originating from fish farms.
Keywords: atlantic salmon; total ammoniacal nitrogen production; fish farming; waste outputs

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