With the political changes in the early 1990s came a new wave of increased tourism to South Africa. This resulted in the increase in the number of reserves wanting lions on their property. Lions have now been reintroduced into over 40 small reserves in South Africa. The dilemma is that in small fenced reserves, the natural mechanisms of lion population limitations and predator-prey dynamics are absent. In open systems, ecological and behavioural processes limit population growth.