Growth modeling approach with the Verhulst coexistence dynamic properties for regulation purposes

Abstract

For this research, the properties of the logistic growth model for independent and coexisting species were used to set definitions for the possible regulation of one or two growth variables through their coupling parameters. The present analysis is done for the single-species Verhulst model without coupling, the single-species Verhulst model coupled with an exogenous signal, and the two-species Verhulst coexistence growth model which represents six different ecological regimes of interaction. The models’ parameters, such as the intrinsic growth rate and the coupling, are defined. Finally, the control results are expressed as lemmas for regulation, and they are shown using a simulation example of a fish population growing independent of human interaction (no harvesting, no fishing) and the simulation of the regulation of said population when the coupling of fish and humans is involved (harvesting, fishing).

Global Population: from Super-Malthus behavior to Doomsday Criticality

“…Two basic cases can be considered for an isolated system where a population develops. [27][28][29][30][31][32][33] The first is related to renewable resources and the system's carrying capacity, i.e., they remain constant despite population growth. In the first phase, the population increases according to the Malthus pattern (Eq.…”