5/7/2023 0 Comments Japanese quail![]() ![]() Weekly data on live weight of Japanese quail from 499 progenies belonging to 20 sires and 60 dam formed the basis of this study. ![]() The purpose of this study is to compare the nonlinear regression models which are used to determine the age-related changes on body weight in Japanese quails and to identify the most appropriate model for the data.Įxperimentation: This study was conducted at The Poultry Breeding Unit, Animal Science Department, Faculty of Agriculture, Akdeniz University, Turkey. With Gompertz and Richards models with the data obtained from broiler chickens. Golian and Ahmadi (2008) compared Hyperbolastic models Sengul and Kiraz (2005)Ĭompared the Gompertz, Logistic, Richards and Morgan-Mercer Flodin in their (1991)Īnd Akbas and Oguz (1998) in quails, compared the Gompertz, Partridges Tzeng and Becker (1981) and Aggrey Studies were made to identify the best model which fits to the data obtainedįrom poultry. Model must be determined for the data which are thought to be studied on. Therefore, available mathematical models must be compared and the optimum ![]() Model fitting problems may occur between species, strains and even between The Gompertz, Richards, Logistic, Bertalanffy, Brody, Negative ExponentialĪnd Morgan-Mercer Flodin are the most common models which are used to defineīody growth in animal science ( Knizetova et al.,ġ991 Aggrey, 2002). Heritability estimates of growth curve parameters were moderate to high ( Narinc AkbasĪnd Yaylak (2000) reported that direct selection for shape of growth curveĬan be applied using the growth curve parameters as simple selection criteria. In selection indexes and mixed model equations in broiler breeding. Growth model parameters and growth characteristics are being used The genetic differences which are established between strains, lines and individualsĪre the basis of breeding studies which are focused on improving the characteristics Of different management systems, feeding requirements and the results of breedingĪpplications can be evaluated ( Narinc et al., 2010). The account values such as point of inflection and growth rate, the effects Growth and of particular importance in both breeding and management. Growth curves are useful tools representing the evolution of body weight during The breeding and feeding strategies ( Narinc et al., These empirical mathematical models of growth patterns are continuousįunctions of time and have biologically meaningful parameters that allow interpreting In agricultural science have focused on fitting deterministic models to weekly Occur in time on the focused feature ( Akbas and Oguz, 1998).įor many years, mathematical expression of the growth is being studied in agriculture, ![]() Growth, a biological phenomenon, is one of the well-known features in creaturesĪnd can be described by the expression of changes on the mass and volume that The traits which mostly studied on quails are the ones related with In addition, raising Japanese quails for their eggsĪnd meat is common and their economic importance is increasing gradually ( Minvielle,Ģ004). High fertilization efficiency and simple equipment of rearing ( NarincĮt al., 2009). Type in poultry breeding experiments because of having short generation interval, The Japanese quail ( Coturnix coturnix japonica) is being used as a model ![]()
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