Research Note: Analysis of Growth Curve Patterns for Muscovy Ducks Using Gompertz and Logistic Models

This study aimed to estimate the growth parameters of Muscovy ducks. The superiority of the study offers insightful information on the Muscovy duck growth curve, makes quantitative comparisons easier, allows for predictive capacities, and quickly finds problems. A total of ۴۰ Muscovy ducks called “Rambon” were used in the study, consisting of ۱۲ males and ۲۸ females. Body weight was weighed periodically every two days from the day-old ducks (DOD) until ۶۰ days of age. The data was analyzed by using Gompertz and Logistic models. The growth curves were analyzed, and parameters such as adult body weight (A), integral constant (B), and growth rate (K) were determined. Inflection points were also identified. Body weight (Wi) and age at the inflection (Ai) point using Gompertz were ۱۰۶۰.۹۵ g and ۴۶.۳۴ d; ۶۱۳.۴۱ g and ۳۰.۵۲ d; ۷۱۲.۵۶ g and ۳۶.۸۱ d, respectively for males, females, and the unsexed. By using Logistic model, the Wi and Ai for males were ۹۳۴.۶۰ g and ۴۱.۴۶ d, females were ۶۷۰.۵۲ g and ۳۲.۹۶ d, and unsexed were ۷۳۹.۱۱ g and ۳۶.۵۶ d. Results showed that the Gompertz model generally outperformed the Logistic model, with lower AIC, BIC, MSE values and slightly higher R۲ for all sex groups, indicating superior fit and predictive accuracy. These findings offer valuable insights into Rambon Muscovy duck growth dynamics, aiding in breeding and production strategies to enhance economic efficiency and sustainability. Farmers can utilize these models to optimize feeding schedules and make informed decisions about slaughtering, ultimately improving Muscovy duck production.

کلیدواژه ها:

Akaike Information Criterion ، coefficient of determination ، Growth curve model ، Inflection point