Note on the stability property of a ratio-dependent Holling-Tanner model

A Holling-Tanner system with ratio-dependence functional response is revisited in this paper. By de9 veloping the new analysis technique, two set of new conditions which ensure the global attractivity of the positive 10 equilibrium of the system are obtained. Our results essential improving the main results of Liang and Pan [Quali11 tative analysis of a ratio-dependent Holling-Tanner model, J. Math. Anal. Appl. 334 (2007) 954-964].