Kolerasi Antara Lama Kebuntingan, Bobot Air Lahir Dan Jenis Kelamin Pedet Hasil Inseminasi Buatan Pada Sapi Bali

Abstract

Purpose of the research was to study the correlation between the gestation period with sex and birth weight of new born calves as the result of artificial insemination (AI) in bali cattle. Data were collected directly from AI technicians in some districts in the province of bali from 1997 to 2003. A total, of 10759 inseminated cows and 799 of which were with completed data of, date of birth, birth weight and sex of calves. The data were collected from 3 districts, involving Gianyar (205 samples), Badung (221 samples) and Bangli (373 samples). Result showed that the gestation period ofbali cows were 284.4±5.7 days and birth weight of 18.4±1.6 kg. Sex ratios (male: female) ofbali calves resulted from AI in 1997 to 2003 were 1.2:1. There were positive correlation between gestation period and birth weight (P>O.Ol) as well as between gestation period and sex of calves with a high correlation coefficient (0.075) which proved that male calves had longer gestation period.than females.