APPLICATION OF PROSTAGLANDINE F₂alfa FOR INDUCTION OF HEAT IN GOATS IN MATING SEASON

Uobičajen način indukcije estrusa u koza obavlja se uporabom spužvica i hormona. Pokušali smo istražiti primjenu prostaglanclina PGF₂ alfa u indukciji mrkanja koza u sezoni parenja. Indukcija mrkanja izvršena je na 70 koza kod jednog privatnog uzgajivača. U sezoni parenja kozama je apliciran prostaglandin u količini od 1-ml dvokratno u razmaku od 10 dana. Od 70 tretiranih grla, mrkanjem je reagirala 51 koza ili 72,857%, a nije reagiralo 18 koza ili 25,714%. Osjemenjivanje koza obavljali smo duboko smrznutim sjemenom jednokratno a po potrebi i dvokratno. Od 51 osjemenjene koze gravidno je ostalo 29 ili 56,862%. Othranjeno je 33 žiive jaradi, odnosno po kozi su dobivena 1,2 jareta. Dobiveni rezultati su ohrabrujući i omogućuju nam primjenu prostaglandina u indukciji koza u sezoni mrkanja.The common method of heat induction in the goat is using vaginal sponges and hormones parenterally. We tried to investigate application of prostaglandine F₂alfa for induction of heat during the season of mating. lnduction of heat was performed in 70 goats of a private owner. During the season of mating every goat was treated with 1 ml of prostaglandine F₂alfa, two times in an interval of 10 days. Out of 70 treated animals 51 or 72.857% showed signs of heat. Goats were inseminated with deep frozen semen once or twice. From 51 inseminated goats 29 or 56.862% were pregnant. A total of 33 alive kids was born, on averaqe 1.2 per goat. These results encouraged us to apply prostaglandin F₂alfa in induction of heat in goats during the season of mating. The treated goats started to heat 20 hours after application of prostaglandin, but the greatest number of goats came into heat after 40-50 hours. In the control group of the 25 goats heat was detected in 3 to five goats every month from the end of August to the end of November