Intensity of respiration and nitrogen metabolism of whitelegged shrimp Penaeus vannamei under artificial conditions
2019
Tyrin, D.V. | Zagorskaya, D.S. | Kovacheva, N.P. | Nikonova, I.N.
The oxygen consumption and the excretion of ammonium of adult white-legged shrimp Penaeus vannamei were studied at a water temperature of 27–28 °C and salinity of 17–18 ‰. Ammonium excretion was studied on 18 shrimps, each of which was kept for 3 days, oxygen consumption was studied on 20 individuals for 2 hours each. It was found that shrimps starving during the day emit on average 0.150±0.062 g of ammonium nitrogen per 1 kg of live weight. When shrimps fed at a rate of 1.3 % of body weight per day, the excretion of ammonium increased to 0.411±0.090 g/kg on the first day and 0.412±0.108 g/kg inthe second. The result of an experiment to determine oxygen needs showed that shrimp consumes 383±71 mg of oxygen per 1 kg of live weight per hour. These indicators can be used in the design of closed water recirculation systems.
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