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Measurements of oxygen consumption and ammonia excretion of Atlantic salmon (Salmo salar L.) in commercial-scale, single-pass freshwater and seawater landbased culture systems |
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| Authors: | Asbj rn Bergheim Edward Andrew Seymour Steinar Sanni Torbj rn Tyvold and Sveinung Fivelstad |
| Institution: | Rogaland Research Institute, Box 2503, Ullandhaug, 4004, Stavanger, Norway Bergen College of Engineering, Lars Hillesgt. 34, 5008, Bergen, Norway |
| Abstract: | The oxygen consumption of Atlantic salmon was measured in large culture tanks for a period of 20 months from the parr to the adult stage. In addition, diurnal sampling was conducted for estimation of both oxygen consumption and ammonia excretion. The oxygen consumption was affected especially by temperature, season and smoltification. For parr the oxygen consumption rate was 1–6 mg O2/kg min and the ammonia excretion rate was 0·037–0·13 mg N/kg min from autumn to spring. The corresponding rates for adult salmon during the period October to July were 1·5–4·5 mg O2/kg min and 0·075–0·13 mg N/kg min. |
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