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...

The method of estimating age frequency from length frequency via the von Bertalanffy growth equation is deterministic and yields biased results. Most of the biascan be removed by incorporating a stochastic element in the von Bertalanffy relationship. The stochastic element is based on estimated probabilities of lengths by intervals at age. the probabilities being estimated from variances in len...

This work aims to propose a new model named Gompertz-Von Bertalanffy bicompartmental (GVB), combination of the models Gompertz and Von Bertalanffy. The GVB is applied fit kinetic curve cumulative gas production (CGP) four foods (SS – sunflower silage; CS corn mixtures 340SS 660 gkg-1 silage 340 660SS silage). compared Logistic-Von (LVB) logistic (BL). All process studied employed semi-automatic...

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...

In this research we proposed two mathematical models for Isoptera mound growth derived from the Von Bertalanffy growth curve, one appropriated for Nasutitermes coxipoensis, and a more general formulation. The mean height and the mean diameter of ten small colonies were measured each month for twelve months, from April, 1995 to April, 1996. Through these data, the monthly volumes were calculated...

Ludwig von Bertalanffy was a key figure in the advancement of theoretical biology. His early considerations already led him to recognize the necessity of considering the organism as a system, as an organization of parts and processes. He termed the resulting research program organismic biology, which he extended to all basic questions of biology and almost all areas of biology, hence also to th...

The growth of Biomphalaria glabrata, B. schrammi, Drepanotrema lucidum and D. kermatoides was studied in three habitatis on Guadeloupe. Theortical growth curves were calculated for each species by applying the Walford method and the von Bertalanffy equation. On Guadeloupe, the growth of B. glabrata was faster in the ponds of Grand Terre than in the small high altitude streams of Basse Terre. Th...

This article offers a concise survey and glimpse of the vast literature presently available in the field of systems thinking and cybernetics. The first part discusses the areas of systems philosophy, systems analysis (mathematical systems theory), empirical systems research, and systems engineering, while the second part offers some details about the contributions of the following selected scho...

We consider three individual-based models describing growth in stochastic environments. Stochastic differential equations (SDEs) with identical von Bertalanffy deterministic parts are formulated, with a stochastic term which decreases, remains constant, or increases with organism size, respectively. Probability density functions for hitting times are evaluated in the context of fish growth and ...

Likelihood methods for the von Bertalanffy growth curve are examined under the assumption of independent, normally distributed errors. The following are examined: determining the best method of estimation, relationships between methods of estimation, failure of assumptions, constructing confidence regions, and applying likelihood ratio tests. An eXanlple is presented illustrating many of the me...