Necessary-Sufficient Conditions for Permanence and Extinction in Lotka-Volterra System with Discrete Delays

In this article, we give the necessary and sufficient conditions for permanence and extinction of a two-species Lotka-Volterra system with different discrete delays. We improve some previous results. Moreover, we show the permanence and extinction for this system is equivalent to that of its corresponding nondelayed system.

Keywords:

• Necessary And Sufficient Conditions
• Lotka-Volterra System
• Discrete Delays
• Extinction
• Permanence