Comparison of Several Models to Fit the Growth Curves of Kıvırcık and Dağlıç Male Lambs

Yavuz AKBAŞ; Turgay TAŞKIN; Erdinç DEMİRÖREN

Makale detayları

Comparison of Several Models to Fit the Growth Curves of Kıvırcık and Dağlıç Male Lambs

Yazarlar:

Yavuz AKBAŞ | Turgay TAŞKIN | Erdinç DEMİRÖREN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue EK3, pp.537-544

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000772110

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

This research was carried out to estimate the growth curves of Kıvırcık and Dağlıç male lambs using monthly body weight data from birth to 420 days of age. Fifteen models were compared in terms of growth curve parameters and for the best fit to the data of Kıvırcık and Dağlıç male lambs. Among the linear models simple linear model gave the best fit for Dağlıç and quadratic model for Kıvırcık. However heterogenity was found in terms of regressions equations within each breed and between genotypes. These results say that common regression equation can not be used for all individual in a breed having different growth pattern, not only regression coeffiecient but also mean levels of dependent variable. Among the non-linear models Brody, Negative Exponential, Gompertz, Logistic and Bertalanffy gave quite good fit for the male lambs data. Brody had the highest coefficient of determination.

 

This research was carried out to estimate the growth curves of Kıvırcık and Dağlıç male lambs using monthly body weight data from birth to 420 days of age. Fifteen models were compared in terms of growth curve parameters and for the best fit to the data of Kıvırcık and Dağlıç male lambs. Among the linear models simple linear model gave the best fit for Dağlıç and quadratic model for Kıvırcık. However heterogenity was found in terms of regressions equations within each breed and between genotypes. These results say that common regression equation can not be used for all individual in a breed having different growth pattern, not only regression coeffiecient but also mean levels of dependent variable. Among the non-linear models Brody, Negative Exponential, Gompertz, Logistic and Bertalanffy gave quite good fit for the male lambs data. Brody had the highest coefficient of determination.

Makale detayları

Comparison of Several Models to Fit the Growth Curves of Kıvırcık and Dağlıç Male Lambs

Yazarlar:

Yavuz AKBAŞ | Turgay TAŞKIN | Erdinç DEMİRÖREN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue EK3, pp.537-544

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000772110

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Growth Curve

Lambs

Dağlıç and Kıvırcık breeds

Linear Models

Non-linear Models

Sayı

Makale detayları

Comparison of Several Models to Fit the Growth Curves of Kıvırcık and Dağlıç Male Lambs

Yazarlar: Yavuz AKBAŞ | Turgay TAŞKIN | Erdinç DEMİRÖREN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue EK3, pp.537-544

Belge Tipi: Makale

Yayın Tarihi: 11/1998

Belge Dili: Türkçe

Document ID (Org No.): 2000772110

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

Growth Curve

Lambs

Dağlıç and Kıvırcık breeds

Linear Models

Non-linear Models

Sayı

Yazarlar:

Yavuz AKBAŞ | Turgay TAŞKIN | Erdinç DEMİRÖREN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 1999 Vol.23 Issue EK3, pp.537-544

Belge Tipi:

Makale

Yayın Tarihi:

11/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000772110

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128