Reproductive performance and fertility index of Etawah-crossbred goats based on several parities at goat breeding station-Singosari, Malang, Indonesia

Abstract

This research aimed to analyze the reproductive efficiency of Etawah-crossbred (PE) goats. Data were collected through a survey method. The research materials were 228 first-parity (P1), 226 second-parity (P2), 147 third-parity (P3), and 73 fourth-parity (P4) heads acquired in 2011-2017. We then observed the service per conception (S/C), days open (DO), conception rate (CR), kidding interval (KI), litter size, birth weight, and fertility index (FI). The obtained data were analyzed with compare means procedure (one-way ANOVA) by using SPSS version 20 and then Least Significant Difference to determine any significant differences. The CR was computed by chi-square test. Results showed that the PE parities significantly affect (P<0.05) the S/C, DO, CR, litter size, and birth weight, but not the KI (P>0.05). The FI was significant on P3 (63.75). Therefore, the reproductive performance of PE goats on several parities based on S/C, DO, CR, litter size, and birth weight was favorable, and P3 had the best reproductive traits according to the FI value.