Predicting Madura cattle growth curve using non-linear model

4th International Conference on Sustainable Agriculture and Environment

农业科学;生态环境科学

Widyas, N.^1 ; Prastowo, S.^1 ; Widi, T.S.M.^2 ; Baliarti, E.^2

Animal Science Department, Faculty of Agriculture, Universitas Sebelas Maret, Surakarta, Indonesia^1

Department of Animal Production, Faculty of Animal Science, University of Gadjah Mada, Yogyakarta, Indonesia^2

关键词: Body measurements;    Explanatory variables;    Linear modeling;    Logistic Regression modeling;    Logistic regressions;    Non-linear model;    Prediction accuracy;    Sub-populations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/142/1/012006/pdf
DOI  :  10.1088/1755-1315/142/1/012006

来源: IOP

【 摘 要 】

Madura cattle is Indonesian native. It is a composite breed that has undergone hundreds of years of selection and domestication to reach nowadays remarkable uniformity. Crossbreeding has reached the isle of Madura and the Madrasin, a cross between Madura cows and Limousine semen emerged. This paper aimed to compare the growth curve between Madrasin and one type of pure Madura cows, the common Madura cattle (Madura) using non-linear models. Madura cattles are kept traditionally thus reliable records are hardly available. Data were collected from small holder farmers in Madura. Cows from different age classes (5years) were observed, and body measurements (chest girth, body length and wither height) were taken. In total 63 Madura and 120 Madrasin records obtained. Linear model was built with cattle sub-populations and age as explanatory variables. Body weights were estimated based on the chest girth. Growth curves were built using logistic regression. Results showed that within the same age, Madrasin has significantly larger body compared to Madura (p