The ambient temperature ranged between 21.7 °C and 36.7 °C, sunshine between 0.8 and 10.2 h a day, rainfall between 0 and 27.4 ram, the relative humidity in the environment between 30 and 90% at different hours of the day, the water temperature between 25 and 29 °C and the relative humidity on the water surface between 61 and 96%