1.Both Oxyopes sertatus and Harpactor fuscipes are important predators of common cutworm (Spodoptera litura) on tobacco.The effect of several interference factors on the predations of O.sertatus and H.fuscipes on the larvae of S.litura were examined in laboratory.The results indicated that there were significant mutual interferences on their predations with the existence of other individual in the same/different species.As the number of the predator increased,the predation rates decreased significantly.The interference coefficients (m) within H.fuscipes and within O.sertatus were 0.7278 and 0.6911,respectively,while the interference coefficient (m) between O.sertatus and H.fuscipes was 0.9464.These results showed that the effect of mutual interference on predation in interspecies was more obvious than that in intraspecies.The number of prey captured and the predation rate of predator dropped with increasing the number of tobacco stalks.This result suggested that spatial heterogeneity was also an important factor affecting the predation of predator on prey.
斜纹猫蛛和红彩真猎蝽均是烟草上斜纹夜蛾的重要捕食性天敌.室内测定几种干扰因素对斜纹猫蛛和红彩真猎蝽捕食作用的影响,结果表明这些干扰因素对斜纹猫蛛种内、红彩真猎蝽种内和两种捕食者种间的捕食作用均有明显的干扰作用,随捕食者数量的增加,其对斜纹夜蛾捕食作用率显著降低.斜纹猫蛛种内的干扰系数和红彩真猎蝽种内的干扰系数分别为0.7278和0.6911,而两者种间的干扰系数为0.9464,说明两者种间的干扰作用要明显高于同一种捕食者种内的干扰作用.两种捕食性天敌对斜纹夜蛾的捕食量和捕食作用率随烟草茎杆数的增加而降低,表明空间异质性同样是影响两种捕食性天敌捕食作用的一个重要因素.
2.The model was generated by the prey - predator - - super predator structure, which was thoroughly studied in earlier biological papers (Olsen LF , Degn H. Chaos in biological systems. Quart Rev Biophysics 1985) .
该模型是建立在被捕食者——捕食者——超级捕食者这个模型之上的,早期的相关论文(Olsen LF,Degn H Chaos in biological systems.Quart Rev Biophysics1985)对其有所研究。
3.In this paper,a classical periodic two prey and a predator predator-prey system with impulsive effect is investigated.The boundedness of system and the local stability of trivial or semi-trivial periodic solution are proved by using comparative theorem and multipliers theory of impulsive differential equation.A set of sufficient conditions are derived for the existence of at least one positive periodic solution,by using the method of coincidence degree.
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.利用脉冲微分方程比较定理和乘子理论,证明了系统的有界性,讨论了平凡周期解和半平凡周期解的稳定性,利用重合度的理论给出了系统存在周期正解的充分条件.
4.The results showed that an abundant predators were found in tea orchard,soybean on field bund, grasses and bushes on the slope and stone cracks in field bunds. Spider was the dominant predator, which consisted of 9 families and 13 species, and accounted for 38.5% -75.0% of all predator species.
初步探明各生境中捕食性天敌种库资源丰富，由蜘蛛、蛙、鞘翅目捕食性昆虫和革翅目捕食性昆虫组成，蜘蛛占捕食性天敌总数的385％－75、0％，种类有9科 13种，优势种是拟水狼蛛；
5.Predator pilots say it is not unusual to abort a Hellfire missile strike when an army helicopter unexpectedly comes into view.
“掠夺者”的飞行员说道，当一架军用直升机出人意料地进入你的视线，你就得取消“地狱火”导弹的发射，这种情况都通常会出现的。
6.That apart, it is unfazed by the prospect of this citadel of British capitalism falling to a foreign predator.
此外，这个英国资本主义的堡垒落入外国人的囊中倒不是件让人担忧的事。
7.Through encrypted satellite communications, the predator was providing a live battlefield television picture back to control rooms at the US Central Command in Tampa, Florida, from where General Tommy Franks has been runnig the war in Afghanistan.
借助加密卫星通信，“食肉动物”侦察机向佛罗里达坦帕的美国中央司令部控制室传回实况战场图像，汤米·弗兰克斯将军就是通过这里的控制室指挥阿富汗战争的。
8.This note studies two-species metapopulations dynamics com mon model considering of the affect of interspecific interaction to colonization and extinction rate and rescue effect,demostrates the conditions of two specie s capable of coexistence in the competitor,predator-prey or mutualist system.
在考虑种间相互作用对定居率和绝灭率的影响以及逃避效应的基础上建立了两物种相互作用的异质种群动态的一般模型，通过模型分析说明了竞争、捕食和互惠共生系统中两物种能够共存的条件.
9.(ecology) a hierarchy of food chains with the principle predator at the top; each level preys on the level below.
（生态学）一个食物链的层次：主要食肉动物在最顶层，每一层捕食其下一层。
10.First flown in 1995, the Predator is a flimsy drone that flies as slowly as a Cessna and can carry far less weight.
“掠夺者”于1995年首次飞向天空，它是一架非常易毁的无人驾驶飞机，其飞行速度如同任何飞机降落时的速度，而且其承载能力微乎其微。
