Journal
PAKISTAN JOURNAL OF ZOOLOGY
Volume 50, Issue 3, Pages 1187-1190Publisher
ZOOLOGICAL SOC PAKISTAN
DOI: 10.17582/journal.pjz/2018.50.3.sc2
Keywords
Growth models; Body weight; Nonlinear function; DDP goat
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This study was conducted to evaluate the most suitable nonlinear functions amongst Morgan-Mercer-Flodin (MMF), Logistic, Von-Bertalanffy and Janosheck models, based on monthly records of body weight from birth to 1 year in Daera Din Panah (DDP) goat. Based on coefficient of determination (R-2), adjusted coefficient of determination (R-ADJUSTED(2)) and root mean square error (RMSE) were used. Janosheck model was chosen as the most appropriate model for its highest R-2 (0.999) and smallest RMSE (0.124). Growth related parameters (A, B, k, and d) of the Janoscheck non-linear model were estimated as 43.000, 0.905, 0.124 and 0.950, respectively. To conclude, it could be suggested that the Janoscheck non-linear model might help breeders who aim to make precise decisions on optimum slaughtering time and to ensure suitable managerial conditions in DDP goat.
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