scholarly journals Application of Non-linear Growth Curve Models to Body Weight in Egg-type Chicken.

1995 ◽  
Vol 32 (6) ◽  
pp. 394-401 ◽  
Author(s):  
Shunzo MIYOSHI ◽  
Mitsuyoshi SUZUKI ◽  
Takatsugu MITSUMOTO
Keyword(s):  
Body Weight ◽  
Growth Curve ◽  
Linear Growth ◽  
Growth Curve Models ◽  
Non Linear ◽  
Linear Growth Curve

Evaluation of non‐linear growth curve models in the Vietnamese indigenous Mia chicken

2021 ◽  
Vol 92 (1) ◽  
Author(s):  
Thinh Nguyen Hoang ◽  
Huong T. T. Do ◽  
Doan H. Bui ◽  
Dang K. Pham ◽  
Tuan A. Hoang ◽  
...  
Keyword(s):  
Growth Curve ◽  
Linear Growth ◽  
Growth Curve Models ◽  
Non Linear ◽  
Linear Growth Curve

Appraisal of growth curve in Sirohi goat using non-linear growth curve models

2019 ◽  
Vol 51 (5) ◽  
pp. 1135-1140 ◽  
Author(s):  
Hina Ashraf Waiz ◽  
Lokesh Gautam ◽  
Syma Ashraf Waiz
Keyword(s):  
Growth Curve ◽  
Linear Growth ◽  
Growth Curve Models ◽  
Non Linear ◽  
Linear Growth Curve

scholarly journals Nigerian Fulani ecotype chickens - II – Estimation of growth curve parameters

2019 ◽  
Vol 46 (3) ◽  
pp. 10-22
Author(s):  
A. R. Sanusi ◽  
S. O. Oseni
Keyword(s):  
Body Weight ◽  
Growth Curve ◽  
Goodness Of Fit ◽  
Management Practices ◽  
Linear Growth ◽  
Production Systems ◽  
Poultry Production ◽  
Growth Functions ◽  
Non Linear ◽  
Best Fit

In the study, growth curves of Nigerian Fulani ecotype chickens (NFEC) were modelled  under two production systems with four non-linear growth functions with a view to  establishing growth descriptors for NFEC. Two hundred, day-old chicks of NFEC were  obtained from an established population of NFEC. The chickens were separated randomly to  intensive and pastured poultry production systems at 12 weeks of age. Data on body weight  were taken weekly over a period of 20 weeks. Four non-linear growth functions including  Gompertz, Logistic, Bertalanffy and Richard's models were fitted using the NLIN procedure  of SAS while the best fit model was selected using the goodness-of-fit tests. For all the models, parameter (A), the asymptotic weight, ranged between 1800g and 2417g for male  and 1208g and 1550g for female chickens respectively. Parameter (B), the scaling parameter  ranged from 0.77 and 19.79. Parameter K, which is the maturity index, ranged between 0.16 and 3.97 for both sexes. The R values ranged between 0.9689 and 0.9987 for all the models  fitted. Gompertz and Bertalanffy models emerged as the best fit functions. Age and body  weight at inflection of NFEC were also predicted by the study. Growth curve parameters of  NFEC in the pastured poultry system were not significantly different from those in the  intensive system. The growth curve parameters estimated indicates that NFEC growth  performance can be improved through effective breeding strategies and improved  management practices.

Two-Stage Method of Estimation for General Linear Growth Curve Models

Biometrics ◽  
1997 ◽  
Vol 53 (2) ◽  
pp. 720 ◽  
Author(s):  
Therese A. Stukel ◽  
Eugene Demidenko
Keyword(s):  
Growth Curve ◽  
Linear Growth ◽  
General Linear ◽  
Two Stage ◽  
Growth Curve Models ◽  
Linear Growth Curve

scholarly journals Testing variance components in balanced linear growth curve models

2012 ◽  
Vol 39 (3) ◽  
pp. 563-572 ◽  
Author(s):  
Reza Drikvandi ◽  
Ahmad Khodadadi ◽  
Geert Verbeke
Keyword(s):  
Growth Curve ◽  
Variance Components ◽  
Linear Growth ◽  
Growth Curve Models ◽  
Linear Growth Curve

scholarly journals On MLEs in an extended multivariate linear growth curve model

Metrika ◽  
2011 ◽  
Vol 75 (8) ◽  
pp. 1069-1092 ◽  
Author(s):  
Katarzyna Filipiak ◽  
Dietrich von Rosen
Keyword(s):  
Growth Curve ◽  
Linear Growth ◽  
Growth Curve Model ◽  
Curve Model ◽  
Linear Growth Curve
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