Factors affecting calf parturition of the Ongole grade beef heifers
Faculty of Animal Science, Sam Ratulangi University, Manado, Indonesia 95115.
Research Article
Open Access Research Journal of Life Sciences, 2022, 03(02), 077–082.
Article DOI: 10.53022/oarjls.2022.3.2.0052
Publication history:
Received on 25 May 2022; revised on 25 June 2022; accepted on 27 June 2022
Abstract:
Serious economic losses due to calf or heifer increasing mortality during parturition, the normal calving period without human interference was urgently needed. The most important internal factor influencing calving difficulty was Calf birth weight (CBW). Other external factors considered to contribute calving difficulty were heifer live weight (HLW), heifer body length (HBL), and heifer chest girth (HCG), calf parturition durability (CPD) representing linear CBW. Objective of this study was to estimate above factor mostly affecting calving difficulty of Ongole Grade heifers mated by artificial insemination method. Study was involving 126 Ongole Grade heifers at the artificial insemination center of North Sulawesi province, Indonesia. Data on HLW, HBL, HCG, CPD and CBW were collected from 126 heifers at ages of two to three years old. All linear body measurements were included as independent variables in multiple regression equation affecting dependent variable of CBW in the models using statistical datasheet of Microsoft Office Excel 2007. Results showed that HCG, HBL and CPD as independent variables can be recommended to predict CBW representing internal factor of Ongole Grade heifers in the multiple regression model as follows: Calf birth weight (Y in kg) = 26.871 + 0.0033 heifer body length (X1 in cm) – 00.0255 heifer chest girth (X2 in cm) + 0.032 calf parturition durability (X3 in minute) with determination coefficient (R2) of 0.91.
Keywords:
Calf Parturition; Internal and External Factors; Ongole Grade Beef Heifer; Heifer morphometric; Heifer body weight; Ongole grade beef heifer
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