Growth curve characteristics in Awassi and Morkaraman sheep, part I: Comparison of nonlinear functions

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Bılgın O. C., Esenbuga N., Macıt M., Karaoglu M.

WOOL TECHNOLOGY AND SHEEP BREEDING, cilt.52, ss.1-7, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52
  • Basım Tarihi: 2004
  • Dergi Adı: WOOL TECHNOLOGY AND SHEEP BREEDING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-7
  • Anahtar Kelimeler: growth curves, body weight, Morkaraman, Awassi, MODELS
  • Atatürk Üniversitesi Adresli: Evet

Özet

Body weight-age data from fifty-four Morkaraman and seventy-nine Awassi sheep, from birth to thirty-six months of age, were used to obtain a growth pattern for the breeds, with the use of Brody, logistic, Gompertz, Bertalanffy and Richards non-linear functions. In both breeds, the Brody and Richards models, with equal R-2 as 0.99, were superior to the others. However, Brody was precise on its parameters and easy to interpret than Richards function. As a result of heterogeneity, on the other hand, no curve computed using mean body weights in this study had the ability to uniformly represent every individual (p<0.001). Biological interpretations of the model parameters were discussed.