Permanence of nonautonomous ratio dependent predator prey systems with piecewise constant argument of generalized type

In this paper, we investigate the dynamics of nonautonomous ratio-dependent predator-prey systems with piecewise constant argument of generalized type (PCAG) [3]. Sufficient conditions are established for some related qualitative properties such as positive invariance, permanence and non-persistence of the systems. Keywords. Piecewise constant argument of generalized type, predator-prey systems, ratio-dependent response, permanence, non-persistence. AMS (MOS) subject classification: 34A36, 34K12, 34K25