| Abstrakt: |
Ongole Grade (OG) cattle is one of the local Indonesian cattle and is the result of a crossbreeding between Sumba Ongole cattle and Java cattle. This study aimed to find the fittest prediction of body weight of OG cattle using body volume and body measurements (chest girth and body length) which were analyzed using their correlation and regression equations. This research was conducted in February 2022 in the Livestock Groups in Tanjung Sari District, South Lampung Regency. The research method used was a survey method with a sampling technique using purposive sampling of 120 male and female OG cattle, with the criteria of cattle aged 2-5 years, not pregnant, and not aggressive. The data were analyzed using correlation and regression models with the help of the R program. The results showed that body volume had the highest correlation value (0.93) with body weight compared to chest girth (0.92), and body length (0.90). The regression equation between body volume (BV), chest girth (CG), and body length (BL) to body weight (BW) were BW=17.0304444392+0.01085426*BV, BW=-484.6830+4.8495*CG, and BW=-652.4710+7.6876*BL, respectively, with the coefficient of determination of 0.87, 0.84, and 0.81, respectively. The conclusion of this study is that body volume can be used to estimate the body weight of OG cattle with the smallest deviation from actual body weight, compared to other body measurements. However, for practical application, chest girth is best predictor for body weight of OG cattle. Our finding suggested that body measurements (CG and BL) can be used as selection criterion to improve performance of OG cattle. [ABSTRACT FROM AUTHOR] |
