Density dependent cellular growth in an age structured colony

Density dependence and its impact on individual growth rates in an age-structured stream salmonid population

In organisms with flexible and indeterminate growth, demographic density dependence can affect both individual fitness and population dynamics. Recent work in stream salmonids suggests that individual growth rates can be depressed even at low population densities, which warrants examination of populations previously assumed to be below carrying capacity. We investigated the effects of populatio...

Does density-dependent individual growth simplify dynamics in age-structured populations? A general model applied to perch, Perca fl uviatilis

1) Systems Analysis Laboratory, Helsinki University of Technology, P.O. Box 1100, FIN-02015 HUT, Finland 2) Department of Ecology and Systematics, University of Helsinki, P.O. Box 17, FIN-00014 University of Helsinki, Finland 3) Adaptive Dynamics Network, International Institute for Applied Systems Analysis, A-2361 Laxenburg, Austria 4) Department of Biological and Environmental Science, Univer...

An Ant-Colony Optimization Clustering Model for Cellular Automata Routing in Wireless Sensor Networks

High efficient routing is an important issue for the design of wireless sensor network (WSN) protocols to meet the severe hardware and resource constraints. This paper presents an inclusive evolutionary reinforcement method. The proposed approach is a combination of Cellular Automata (CA) and Ant Colony Optimization (ACO) techniques in order to create collision-free trajectories for every agent...

Evolution of stochastic demography with life history tradeoffs in density-dependent age-structured populations.

We analyze the stochastic demography and evolution of a density-dependent age- (or stage-) structured population in a fluctuating environment. A positive linear combination of age classes (e.g., weighted by body mass) is assumed to act as the single variable of population size, [Formula: see text], exerting density dependence on age-specific vital rates through an increasing function of populat...

Age-Dependent Cellular Immune Responses