Uporaba egzogenog melatonina u Ouled Djellal ovaca i ovnova izvan sezone parenja

The study aimed to investigate the effect of exogenous melatonin treatment on ewe’s and ram’s reproductive activity, out-of-season breeding, usually matching with spring. eighty four adult ewes 16 genitor rams Ouled Djellal breed, taken randomly out a 176 ovine flock were treated respectively 1 or 3 subcutaneous ear implants (Melovine). 76 non-treated remaining served as control group. rams, kept separately from females, had scrotal perimeters measured before (PS1) 47 days after (PS2) treatment, they allowed run ewes. analysis lambing rates not shown anysignificant difference (P>0.05) between those group (90.4% vs. 97.3%) which proves that their sexual activity is under photoperiod control. However, by t-test paired samples significant (P<0.05) measurements in potential this hormone daily sperm output. During period, no female has been noted. In sheep use recommended but it can be useful since enhances capacity during mating.