Kafkas Universitesi Veteriner Fakültesi Dergisi (Jul 2021)
Predicting the growth curve of body weight in madura cattle
Abstract
The growth curve of livestock animals is important to evaluate the biological development managed with a farming management system. This study aimed to estimate the growth curve of body weight (BW) in Madura cattle (Bos indicus) kept at the breeding management. Three non-linear models of Logistic (L), Gompertz (G) and Von Bertalanff y (B) were performed in this study using 186 records data and computed with SPSS 16.0 package. Research showed that the asymptotic weight (male/female) was reached of 220.80/218.02 kg (L), 277.72/274.13 kg (G) and 333.92/329.83 kg (B). The weight of infl ection (male/female) was reached of 110.40/109.01 kg (L), 102.10/100.78 kg (G) and 98.94/97.73 kg (B). The time of infl ection (male/female) was reached of 10.89/10.47 months (L), 10.09/10.23 months (G) and 9.80 months (B). Moreover, the coefficient of determination (R2) in all models included of high category i.e. 0.68 (male) and 0.70 (female). However, three goodness-of-fit parameters of root mean squared error (RMSE), Akaike"s (AIC) and Beyesian (BIC) values revealed that G and B models were more accurate than the other models for male and female, respectively. It can be concluded that about 68-70% of body weight of animals in a study can be explained by non-linear models of L, G and B.
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