Abstract
The restocking effects on a discrete growth population are considered in relation to two types (quadratic and Ricker) of reproduction system. Local stability analysis and numerical calcula-tions are carried out to clarify the dynamics of the population. The stability depends on all pa-rameters employed in the model. For the quadratic model, the restocking makes the equilibrium unstable, while for the Ricker model, the restocking produces stability. When increasing rate is high, and restocking level is low, then either population destruction occurs or crash cycles emerge. Restocking produces critical effects on population growth in some cases.
