| 1. | In chapter two , we study a ratio - dependent predator - prey system . we consider the death rate of predator as the natural mortality rate and the other death rate caused by the intraspecies competition or other factors , i . e . , we consider the predator density dependence
对于捕食者的死亡率，我们不仅考虑了捕食者的自然死亡因素，而且还考虑了由于种内之间争夺资源及其它原因引起的死亡等因素，即考虑捕食者之间密度制约因素。 |
