Source : Webster's Revised Unabridged Dictionary (1913)

Troat \Troat\, v. i. [Either onomatopoetic, or akin to throat.]
   To cry, as a buck in rutting time.

Troat \Troat\, n.
   The cry of a buck in rutting time.

Source : WordNet®

troat
     v : emit a cry intended to attract other animals; used
         especially of animals at rutting time