این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Agricultural Science and Technology، جلد ۱۶، شماره ۱، صفحات ۵۷-۶۸
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Comparison of Mathematical Models for Describing the Growth of Baluchi Sheep
چکیده انگلیسی مقاله The objectives of this study were to identify a suitable mathematical model for describing the growth curve of Baluchi sheep based on monthly records of live weight from birth to yearling; and to evaluate the efficacies of nonlinear mixed effect model (NLMM) and the nonlinear fixed effect model (NLM) methodologies. Growth models were fitted to a total of 16,650 weight–age data belonging to 2071 lambs. Five nonlinear growth functions of von Bertalanffy, Gompertz, Brody, Logistic, and Richards and two linear polynomial functions were applied. The growth models were compared by using the Akaike’s information criterion (AIC) and residual mean square (MSE). Among all nonlinear fixed effect models, the Brody function had the smallest AIC and MSE values, indicating the best fit for both sexes. The Brody fixed effect model compared with NLMM including one random effect of asymptotic mature weight. The model evaluation criteria indicated that the Brody mixed effect model fitted the data better than the corresponding fixed effect model. It can be concluded that, among the linear models, the polynomial of the third order and, among nonlinear models, Brody mixed model were found to best fit the Baluchi sheep growth data.
کلیدواژه‌های انگلیسی مقاله Body weight,growth model,nonlinear regression
نویسندگان مقاله محمدرضا بحرینی بهزادی | m r bahreini behzadi
department of animal sciences, yasouj university, p. o box 75918-74831, yasouj, islamic republic of iran.
سازمان اصلی تایید شده: دانشگاه یاسوج (Yasouj university)

علی اکبر اسلمی نژاد | a a
department of animal sciences, ferdowsi university of mashhad, p. o box 91775-1163, mashhad, islamic republic of iran.
سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

علیرضا شریفی | a r
department of animal sciences, animal breeding and genetics group, george-august-university göttingen, 37075 göttingen, germany.

h simianer |
department of animal sciences, animal breeding and genetics group, george-august-university göttingen, 37075 göttingen, germany.

نشانی اینترنتی http://jast.modares.ac.ir/article_10300_6dbbd6beee43147266f177a2af186e32.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات