Showing papers in "Acta Biotheoretica in 1969"

On territorial behavior and other factors influencing habitat distribution in birds

Abstract: This example is provided so that non-theorists may see actual applications of the theory previously described. The Dickcissel sex ratio is employed as an indirect index of suitability. A sex ratio index was found to be correlated positively with density. This is consistent with the hypothesis that territorial behavior in the males of this species limits their density. This study provides a valid example of how the problem can be approached and offers a first step in the eventual identification of the role of territorial behavior in the habitat distribution of a common species.

Electrostatic field calculations of charge and dipole models of membrane systems.

Abstract: Calculations are made for the components of the field for electrostatic models of a fixed charge and dipole square sheet. The contributions to the field in certain nonaxial positions indicate that the components of the fieldincrease as a function of distance until they reach amaximum where they thendecrease in the normal manner. In the axial position, the field decreases as a function of position confirming analyses described in previous articles of comparisons of axial symmetric charge and dipole fields.