一类具有收获率的捕食与被捕食系统  

A Class of Predator-prey System with Harvest-ratio

作　　者：周展宏[1] 

机构地区：[1]湛江海洋大学基础科学系,广东湛江524025

出　　处：《湛江海洋大学学报》2002年第1期51-56,共6页Journal of Zhanjiang Ocean University

摘　　要：捕食者之间为获取食物开展竞争的捕食与被捕食系统通常用ratio dependent捕食与被捕食系统描述。本文讨论这类系统在有人为开发 (即有常数收获率 )时 ,系统的持久性问题 ,通过常微分方程的定性分析 ,得到为保持生态平衡 。Predator prey system of contest for food among predators can usually be described by ratio dependent predator prey system. This article discusses the persistence problems of this kind of system under man made developing condition (constant harvest ratio). By qualitative analysis of ordinary differential equation, we obtained the maximum upper limit to keep ecologic balance.

关 键 词：捕食 被捕食 收获率 持久性 定性分析 常微分方程 生态平衡 

分 类 号：S181[农业科学—农业基础科学]