QUALITATIVE-ANALYSIS OF ONE-SPECIES OR 2-SPECIES NEUTRAL DELAY POPULATION-MODELS

In this paper neutral delay models of single population growth, predator-prey, and competition interactions are introduced and investigated. These systems are more general than previous ones by allowing per capita growth rates to be nonlinear and delays to be of the general distributed type. Conditions are given for solutions of these systems to be bounded for proper initial functions. For neutral delay single population models, sufficient conditions for solutions tending to the positive steady states axe also presented.