The results of research over influence of air temperature on oxygen condition in carp pond are present in this paper. Mean of dissolved oxygen concentration observed at 8 am were equal 7,18 mg O2·dm-3, at 2 pm – 12,76 mg O2·dm-3 and at 8 pm – 13,37 mg O2·dm-3. Large fluctuations of dissolved oxygen concentration in the euphotic zone of eutrophic fish pond were observed. Oxygen condition lower then lower limit of dissolved oxygen concentration for carp (5 mg O2·dm-3) were observed at 8 am (minimum = 2,34 mg O2·dm-3). The highest oxygen concentration were observed in the afternoon (14 pm) and in the evening (8 pm). The highest oxygen concentration were equal 25,8 mg O2·dm-3. Analysis of connection between air temperature and dissolved oxygen concentration revealed weak but essential relationship for the results from 2 and 8 pm. Increase of oxygen concentration was observed with increase of air temperature. ...
