If you want to chance the value 0.5 males hatching temperature must be defined at 27.9 degrees Celsius. If the opportunity occurred, 0.8 males hatching temperature must be defined at 28.7 degrees Celsius.
To be given the chance of 0.5 males to incubate at a temperature of 27.9 degrees Celsius, to the likelihood of male to incubate 0.8 to determine the temperature at 28.7 degrees Celsius.
If you want the chance to set the temperature of incubation in male 0.5 that 27.9 degrees Celsius. If you want the chance to set the temperature of incubation in male 0.8 that 28.7 degrees Celsius.