Nl. Krushinskaya et al., SEX DETERMINATION OF REINDEER (RANGIFER T ARANDUS) FROM MEASUREMENTS OF MANDIBLES, Zoologiceskij zurnal, 76(3), 1997, pp. 379-381
There is no sex dimorphism in reindeer less than three years old. In a
dults with definitive dentition it is possible to determine sex from t
he length of the mandible diastema. The specimens with the diastema sh
orter than 94 mm are females, those with diastema longer 100 mm are ma
les. The animals with intermediate values of the diastema length can b
e qualified as females if their molars are worn out and as males if th
eir molars are not worn out.