查询词典 predator

The marsupial has no natural predator but has been in decline for decades due to urban sprawl and from car accidents and dog attacks.

这种有袋动物并没有自然天敌，但其数量在过去几十年间逐渐减少，主要原因是城市的扩张、车祸和狗的袭击。

METHODS AND MATERIALS We collected mosquitofish from a pond in Mecklenburg County, North Carolina, to condition water with predator chemicals.

材料与方法我们收集mosquitofish ，从一个池塘中mecklenburg 县，北卡罗来纳州，以水条件与捕食者的化学品。

First, in Chapter 3, a two-dimensional interacting birth-death process is established and by means of two-dimensional moment generating function, the equivalence in mean between our model and the classic prey-predator model are proved.

这部分包括第三，四章。在第三章，我们建立了一类新的随机捕食-被捕食模型，并证明了新模型在平均意义上与经典的捕食-被捕食模型的等价性，讨论了其灭绝性，平衡态分布等。

In the third chapter, we study the existence, uniqueness, global stability of positive solution and MLEs of parameters of Lotka-Volterra competition system, mutualism system and predator-prey system with random perturbation.

第三章研究了具有随机扰动的Lotka-Volterra型的竞争系统，互惠系统和捕食-被捕食系统正解的的存在性，唯一性，全局渐近稳定性以及参数的极大似然估计。

There are many ways that a mutualist may affect a predator-prey interaction, but here we consider just one of these, we consider cases in which a mutualist modifies predation to the benefit of the prey, namely a mutualist deterring predation on a prey.

互助者的介入对捕食-食饵系统可能产生各种各样的影响，这里，我们所考虑的只是其中的一种情况：互助者的存在对捕食者有威慑作用，从而不利于其对食饵种群的捕获，同时，食饵种群的存在又可以提高互助者的平均增长率。

Natality, mortality and population Predator behavior and prey growth (H2) response J2

混沌 数学上有关混沌的定义与俗语中的用法是截然不同的。

Natality, mortality and population Predator behavior and prey

出生率，死亡率和种群增长H2

This paper discussed a strongly coupled prey-predator model under the homogeneous Neumann boundary condition.

讨论了一个强耦合的Holling-Tanner型捕食模型，利用Harnack不等式和最大值原理给出了它正解的上、下界估计。

Eye-spots on several fossils discovered from Inner Mongolia and Liaoning Province are described, which are arranged to Kalligrammatidae, Neuroptera. Based on the research about mimicry of living insects and behavior of extant neuropteran, we suppose that mimics could play an important role for surviving of kalligrammatids in Mesozoic, might thunder against the predator or lure the prey.

对新近发现于内蒙古和辽宁的多块脉翅目丽蛉科化石上的眼斑进行了描述，根据现生昆虫的拟态及现存脉翅目昆虫的行为特点，分析了丽蛉在进化上出现的拟态现象在当时的古生态环境中可能起到恐吓捕食者和引诱猎物的作用。

He existence and stability of the nontrivial and nonnegative steady-state solution of an ecological predator-prey system with the reaction-diffusion term are discussed.

应用渐近展开的方法构造生物学里提出的一类具有反应扩散项的捕食者─食饵系统的非平凡非负定态解，并应用固有值的解析摄动理论对所获得的非平凡非负定态解进行了稳定性分析。

The changes of the HAF after liver injury may be related to the volume of blood loss, the intraabdominal pressure and the pneumoperitoneum duration.

肝撞击伤伴失血后肝动脉血流量的变化与失血量、气腹压力以及气腹持续时间等有密切联系。

Reneging on our commitments to the world's poor cannot be an austerity measure, she said.

放弃我们给世界上的穷国的承诺不能成为一种紧缩措施。