Seasonal variations in serum concentrations of testosterone, testicular volume and neck circumference of fallow deer ( Dama dama ) kept ex situ in a tropical region

The fallow deer ( Dama dama ) is a species of Cervidae commonly kept in captivity, either in commercial farms or in zoos. The reproductive seasonality of this species is well known in the northern hemisphere, where photoperiod is a decisive factor in androgenic activity and, consequently, in the development of secondary sexual characteristics among male adults. The maintenance of this species in tropical regions has been successful, but there...