In this paper, we investigate the dynamics of a discrete-time stage-structured population model where juveniles and adults may be subject to threshold harvesting. This management policy allows harvesting target only if its size exceeds predetermined threshold. It is commonly used for maintaining biomass, obtaining higher yield, preventing collapse. We focus on response structured populations st...

Maturation strategies play a key role in the survival and development of populations. In response to changes external environment human interventions, populations adopt appropriate maturation strategies. Different can lead different birth mortality rates. this paper, we develop analyze stage-structured population model with two obtain conditions for coexistence competitive exclusion. Our result...

We study the dynamics of classical solutions a two-stage structured population model with nonlocal dispersal in spatially heterogeneous environment and address question persistence species. In particular, we show that species’ is completely determined by sign principal spectrum point, λp, linearized system at trivial solution: species goes extinct if λp≤0, while it persists uniformly space λp&g...

The relationships between a predator population's mortality rate and its population size and stability are investigated for several simple predator-prey models with stage-structured prey populations. Several alternative models are considered; these differ in their assumptions about the nature of density dependence in the prey's population growth; the nature of stage-transitions; and the stage-s...

We study a stage-structured single species population model with Allee effects. The asymptotic dynamics of the model depend on the maximal growth rate of the population as well as on its initial population size. We also investigate two models of host-parasitoid interaction with stage-structure and Allee effects in the host. The parasitoid population may drive the host population to extinction i...