Parasitism is a kind of predator-prey relationship in which one organism, the parasite, derives its food at the expense of its symbiotic associate, the host.
寄生是一种捕食者与被捕食者之间的关系，寄生者利用共生伙伴——宿主来获取食物。
We investigate optimal policy for a predator-prey system with age-dependent.
研究一类具有年龄结构的捕食-食饵种群动力系统的最优收获策略。
This deceptively minimalist predator-prey game triggers some remarkably intense feelings.
这个极其简单的虚拟捕食--被捕食游戏引发了一些显著而强烈的情绪。
In this paper, a class of predator-prey systems of three species with discrete time is studied.
本文研究了一类三种群离散型捕食者食饵系统。
The predator-prey model whose predator's density interference term's coefficient is related with prey is investigated.
研究了一类捕食-食饵模型，其中捕食者的密度干扰项的系数与食饵密度有关。
In this paper, a classical periodic two prey and a predator predator-prey system with impulsive effect is investigated.
本文讨论一类具有脉冲效应和周期系数的两个食饵一个捕食者的捕食-食饵系统的动力学行为。
In chapter 4, the effects of impulses on the persistence and extinction of predator-prey systems are studied thoroughly.
第四章我们建立并系统地分析了脉冲效应对捕食系统持久性和灭绝性的影响。
Holling I predator-prey model with mutual interference and impulsive effect concerning integrated pest management is also studied.
第五章研究了可更新生物资源生物经济管理的脉冲捕获模型。
In this paper, we studied the existence and uniqueness of limit cycle or the predator-prey system (l), and obtained theorems 1, 2, 3.
本文研究捕食—食饵系统(1)极限环的存在唯一性，得到了文中的定理1、2、3。
In chapter 2, the local bifurcation and stability of positive steady-state solutins for a class of predator-prey model are investigated.
第二章对一类捕食-食饵模型解的分歧和稳定性进行了讨论。
A three-species ratio-dependent predator-prey model with time delays is investigated, conditions are given for persistence of the system.
研究了一类具有时滞的基于比率型三种群捕食者-食饵系统，给出了系统持续生存的条件。
The existence of positive solutions of the steady-state system is studied for a kind of predator-prey model under the third boundary conditions.
研究了一类捕食者-食饵模型的平衡态系统在第三边界条件下正解的存在性。
This paper deals with such a class of predator-prey models that the predator, in addition to the prey considered, has other natural sources of food.
本文研究这样的一类捕食模型：捕食者不但有模型中被捕食者作为食物，而且还有其它固定的自然食物源。
In this paper predator-prey systems with periodic impulsive effect concerning pest control are proposed through biological control and chemical control.
摘要本文通过生物控制和化学控制提出了具有周期脉冲效应与害虫控制的捕食系统。
He suggests that these observations of bugs predating reptiles call into question previously held opinions about predator-prey dynamics in freshwater habitats.
他认为观察到的这些昆虫捕食爬行动物的现象引发了对之前所持对淡水生境中捕食动态观点的疑问。
We obtain the following main results. 1. A strengthen type predator-prey model of predator with disease and standard incidence is formulated and analyzed.
主要得到以下结论：1。建立了一类疾病在捕食者中传播且具有标准传染率的强身型捕食。食饵模型。
But he thinks other pitcher plant processes - predator-prey interactions, mutually beneficial species, the effects of disturbance - are found across ecosystems.
不过，他认为，可以确定猪笼草的其它进程——捕食者-猎物互动、物种互利、骚动的影响——超越了生态系统。
This paper discusses the state of Hopf bifurcation in a predator-prey system when parameter varies in some field, and analyzes the stability of the system.
讨论了一类捕食者-食饵系统的参数在某个范围变化时在非零不动点处产生霍普夫分叉的情况，并对其稳定性进行了分析。
This paper studied the effect of prey refuges on the stage-structured predator-prey model with two life stages-immature and mature, and with a mature prey using refuges.
构造了一个具有阶段结构的捕食—食饵模型，并研究了庇护所效应对于该系统平衡点的稳定性、平衡密度及其种群长期续存的影响。
It included two parts. In first part a predator-prey model was proposed. Two stable states were obtained according to eclolgical data of panda and bawboo in area of Wolong Reserve.
包括两大部分：第一部分中，假设为捕食被捕食模型，根据在卧龙保护区收集的数据得到两个稳定态；
An annular model for chemostat was depicted by a group of ODE(ordinary differential equation) to imitate the ecosystem which included competition and predator-prey relations in nature.
为模拟自然界中既包含竞争关系又包含捕食-被捕食关系的生态系统，建立用常微分方程组表示的环状模型。
A system of retarted functional differential equations as a predator-prey model with stage structure and dispersion is discussed. Conditions for global stability of the system are given.
讨论了一类带有扩散和具有阶段结构与时滞的两种群捕食系统，分析了该系统的非负不变性、边界平衡点性质及全局渐近稳定性。
Sufficient conditions are obtained for the global existence of a positive periodic solution of periodic neutral delay predator-prey system by using the method of coincidence degree theory.
利用重合度理论建立了一类周期中立型时滞捕食者-食饵系统正周期解的全局存在性的充分条件。
Biologists speculate that the mostly likely cause was a shift in Pacific Ocean currents, but food availability, changing river conditions and predator-prey relationships could be affecting the fish.
生物学家推测，最有可能的成因是太平洋洋流的变化，不过食物的取得、河流环境的改变、生物掠夺关系等，也都可能对鲑鱼造成影响。
In the second part, a predator-prey model of ordinary differential with one-way diffusion is studied considering the monsoon, river flows, other natural conditions and living habits as background.
第二章以季风、河流流向等自然条件和生物生活习性为背景，建立食饵单向扩散的捕食-被捕食系统的常微分模型。
The following three species periodic predator-prey system is considered, the sufficient condition for the existence of a globally and asymptotically stable periodic solution of the system is obtained.
本文研究了一类三种群周期食饵系统，并给出了其存在平稳振荡的充分条件。
Prey species, like young deer or goats, for example, typically play by performing sudden flight movements and turns, whereas predator species, such as cats, practice stalking, pouncing, and biting.
比如说，像小鹿或者山羊这种被捕食的种群，它们的代表动作就是突然快速逃跑的动作和突然转弯；相反的，猫科动物之类的捕食种群会练习潜行追踪、猛扑和撕咬等动作。
When experimental populations are set up under simple laboratory conditions, the predator often exterminates its prey and then becomes extinct itself, having nothing left to eat.
当实验种群在简单的实验室条件下建立起来时，捕食者往往会消灭它的猎物，然后自己也走向灭绝，因为没有东西可以吃。
Low prey population levels then provide inadequate food for the predators, causing the predator population to decrease.
较少的猎物数量为捕食者提供了不足的食物，导致捕食者数量减少。
The elements of intelligence and consciousness come together marvelously to produce different styles in predator and prey.
智慧和意识的元素奇妙地结合在一起，在捕食者和猎物身上产生了不同的风格。
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