Seven non-linear growth models were compared in the Andalusian turkey, an endangered native breed. To this aim, turkeys weekly weighted until they reached 35 weeks. The goodness-of-fit and flexibility criteria of Brody, Von Bertalanffy, Verhulst, Logistic, Gompertz, Richards, Sinusoidal evaluated to quantify their ability describe biological curve. Goodness-of-fit assessed comparing mean square...

'Biology is an 'unrestricted' science ... and its phenomena are of a complexity which has severely tested scientific method. Biologists, in fact, have been among the pioneers in establishing ways of thinking in terms of wholes, and it was a biologist, Ludwig von Bertalanffy, who suggested generalising this thinking to refer to any kind of whole, not simply to biological systems.' (Checkland, 19...

This study used isotonic regression analysis to classify non-linear models that were describe the growth curve in relation different quality fit criteria. The best model selection was made by using weight–age data obtained from Awassi sheep. Ten measured determination coefficient, Akaike information criterion, Bayesian mean quadratic estimation error, and estimated coefficient of used. As a res...

The aim of this study was to determine the best non-linear function describing growth Linda goose breed. To achieve aim, five functions, such as exponential, logistic, von Bertalanffy, Brody and Gompertz, were employed define live weight-age relationship for male female geese. In study, 2 397 body records from 75 females 66 males collected three days 17 weeks age evaluated using "easynls" "nlst...

The study aimed was to determine the best nonlinear function describing growth stages of Japanese quail breed. To this aim, functions such as exponential, logistic, von Bertalanffy, Brody, and Gompertz were used is in description body weight-age relationship male female quails. Multivariate Adaptive Regression Splines (MARS) data mining algorithm applied individual parameters obtained from dete...

The objective of this study was to evaluate the growth curve 525 monthly body weight data 19 males (n=313) and 8 females (n=212) swamp buffaloes (Bubalus b. carabanensis), from birth slaughter age (25 months). nonlinear models used were: logistic, Gompertz, Von Bertalanffy Brody. parameters were estimated by NLIN procedure, criteria adjustment given Akaike’s information criterion (AIC), Bayesia...

En la actualidad, el impacto que ha tenido teoría de los sistemas -por supuesto, en algunos países del mundo- radica hecho nos permite comprender funcionamiento mundo, desde sistema más pequeño hasta complejo, e incluso lo complejo sumergido interactuando redes complejidad, toda vez paradigma sistemático indica todo es mayor a suma sus partes, pero este dinámico interconectado comunicacionalmen...

A recent publication proposed a framework for evaluating complex policies and complex situations grounded in the interaction of four elements – simplicity, inventiveness, flexibility, and specificity. In a foreword, Elliott Stern commented on the legacy of a systems approach based on the work of influential thinkers (Ludwig von Bertalanffy, James Miller, Fred Emery, Eric Trist, Stafford Beer, R...