Relationship between body morphometrics and prolificacy of Jawarandu goats in sun farm Semarang regency

Abstract

This research aimed to analyse the relationship between body morphometrics and prolificacy of Jawarandu goats in Sun Farm Semarang Regency. The purposive sampling method is used to collect the research object samples. The samples of this research are 10 Jawarandu goat mothers that had given birth (single or twins), aged 2-3 years, and had given birth 2-3 times. This research's observation variables are divided into two variable groups which are prolificacy rate as dummy variables and morphometrics as dependent variables. The morphometric variables observed include body height (BH), body length (BL), chest circumference (CC), and hip width (HW). The data is analysed using regression analysis with the dummy (D) variables. If the prolificacy is low (mother goat with a single kid) then D=0, and if the prolificacy is high (mother goat with twins) then D=1. Based on the regression analysis, the chest circumference and hip width are significantly related to prolificacy with the regression equation of CC = 77,335 + 5,778 D and HW = 16,418 + 1,972 D. The body height and body length are not significantly related to prolificacy. In conclusion, chest circumference and hip width are closely connected with prolificacy. The possibility of twin births in Jawarandu goats increases with bigger chest circumference and hip width.