Modeling of growth in Lohmann LSL pullets with neural networks and nonlinear regression models
Journal Title: Revista MVZ Cordoba - Year 2013, Vol 18, Issue 3
Abstract
Objective. Modeling the pullet growth curve of the Lohmann LSL line, by using nonlinear model (MNL), nonlinear mixed model (MNLM) and artificial neural networks (ANN). Materials and methods. An average of 33 birds, were weighed from day 21 to 196 of life for 558 individual weight records. To adjust the growth curve the following models were used: nonlinear Von Bertalanffy (MNL), nonlinear mixed Von Bertalanffy (MNLM) and artificial neural networks (RNA). The models were compared with a correlation coefficient and precision measurements: mean square error (MSE), Mean Absolute Deviation (MAD) and the mean absolute percentage error (MAPE). Results. Correlation values, between actual and estimated data, were 0.999, 0.990 and 0.986 for MNLM, RNA and MNL respectively. The most accurate model based on the MAPE, MAD and CME criteria was MNLM followed by RNA. The prediction graph for RNA was similar to MNLM. The RNA performance was higher than MLN. Conclusions. The best model for the prediction of growth curves of commercial Lohmman LSL birds to 196 days of age, was the MNLM, with multiple measurements per animal at the time. RNA performance was higher MLN.
Authors and Affiliations
Luis Galeano-Vasco, M. Sc *| Universidad de Antioquia, Facultad de Ciencias Agrarias, Grupo investigación Genética, Mejoramiento y Modelación Animal, A.A. 1226, Medellín, Colombia.Correspondencia: lf.galeano.vasco@gmail.com, Mario Cerón-Muñoz, Ph. D| Universidad de Antioquia, Facultad de Ciencias Agrarias, Grupo investigación Genética, Mejoramiento y Modelación Animal, A.A. 1226, Medellín, Colombia.
Keywords
Related Articles
- EP ID EP3335
- DOI -
- Views 407
- Downloads 18
WEST NILE VIRUS: PERSPECTIVE IN THE VERTEBRATE WORLD
West Nile virus, an arthropod-borne virus belonging to the family Flaviviridae, genus Flavivirus, is transmitted in a cycle involving mosquitoes and birds. For many decades it had been recognized in Africa, Asia and the...
Sunflower meal concentrations in Massai grass silage
Objetive. This experiment was conducted to evaluate the best sunflower meal concentration in Massai grass silage. Materials and methods. The treatments were composed of 0, 8, 16, and 24% sunflower meal (natural matter ba...
MORFOMETRY CHARACTERIZATION OF ZEBÚ FEMALES AND IT’S CROSSED WITH “BLANCO OREJINEGRO, ROMOSINUANO AND ANGUS”
To characterize and to determine some factors that could have a greater utility making decisions in a cattle industry, were considered quantitative measurements like the high of the animal, the hips width and qualitative...
SEROLOGICAL STUDY ABOUT NEOSPOROSIS IN CATTLE WITH REPRODUCTIVE DISORDERS IN MONTERIA, CORDOBA, COLOMBIA
Objective. To determine the presence of antibodies anti N. caninum in cows with reproductive disorders. Materials and methods. Sera of 196 cows from 27 farms of Montería city, Colombia, were included. The test used was E...
Evaluation of reused norgestomet implants in estrus synchronization protocols in Brahman cows
Objective. To evaluate progesterone concentrations, occurrence of estrus and pregnancy rates in Bos indicus cows submitted to several estrous synchronization protocols with previously used Norgestomet implants. Materials...