Reproductive performance comparison between natural and artificial service in Jawarandu goat

Abstract

This study was aimed to compare reproductive performance of Jawarandu goat serviced naturally and artificially. In total 433 Jawarandu does were randomly allocated into two groups namely Natural Mating (NM; n=233) and Artificial Insemination (AI; n=200). In this study, reproductive performance was measured in percentage of pregnancy, litter size, and kid born single, twin and triplet. Between groups, data were compared using t-test at a = 5%. NM group was performed in mating pen, and per Boer buck was colonized with 20-25 does for 45 days, followed with pregnancy check using ultrasonography at day 45 post insemination. In AI group, oestrous signs were observed in morning and evening, while insemination was done maximum 12 hours after sign of oestrous. The percentage of pregnancy in NM was higher (p<0.05) compared to AI (73.39 vs 21.00%), litter size (1.37±0.49 vs 1.35±0.56; p>0.05). Similarly, in percentage of kid born single, twin and triplet, no differences were found in both groups (63.35 vs 64.86; 36.02 vs 35.14; and 0.62 vs 0%; respectively). All in all, natural service gives better reproductive performance compared to the artificial one. Its suggested due to factors related to the ability to determine the right time for service.