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The bird is caught on the horns of a dilemma . Should it attack the predator , even though it then risks its own life ? Or should it get out while the going is good ?
这只鸟进退维谷。是应该冒着生命危险攻击捕食者呢?还是应该及早逃命?
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When a predator always eats huge numbers of a single prey , the two species are strongly linked ; when a predator lives on various species , they are weakly linked .
如果捕食者总是吃掉大量的单个物种,那这两个物种就是紧密相连的;如果猎食者靠捕食多个物种为生,那它们之间的联系就比较弱。
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The reptile 's prickly skin repels nearly all of its predators .
这种爬行动物浑身是刺,几乎所有的捕食者都退避三舍。
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The company is worried about takeovers by various predators .
公司担心被各种虎视眈眈的集团收购。
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Their natural predators have been killed off
它们的天敌被全部杀死。
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The baby birds are kept safe form predators by a corrosive ditch .
一条腐蚀性的水沟才能保护幼鸟不被捕食者伤害。
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This idea is based on the principle that lions and other predators are far less likely to attack when they feel they are being watched .
当狮子及其他捕食性动物觉得自己正被注视着时,它们就不大可能会继续袭击,这种想法就是基于这一原理。
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Wild pigs attracted golden eagles from the mainland , and those flying predators crashed the fox population .
岛上的野猪引来了大陆的金雕,这些飞行的捕食者们导致岛屿灰狐的数量大幅下降。
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But , as the human study suggest , another reason for dolphins keeping their eyes open during sleep is that they can look out for predators while asleep .
但是,正如这项针对人类的研究所显示的,海豚睁眼睡觉的另一个原因在于它们睡觉时要提防捕食者。
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As one of the most habitats predators , killer whales may not fit the speculate of a cultured creature .
作为栖息地最多的掠食者之一,虎鲸可能不符合养殖生物的推测。
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She also knew from previous work conducted on birds and dolphins that these animals put half of their brains to sleep at a time so that they can rest while remaining alert enough to avoid predators .
她还从之前对鸟类和海豚的研究工作中得知,这些动物每次睡觉时都让它们的半边大脑处于睡眠中,这样它们能够一边保持对捕食者的警觉,一边休息。
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If a predator can eat several species , it can survive the extinction of one of them .
如果一个掠食动物以好几个物种为食,那这些物种中其中一个就算灭绝了,它也能存活下来。
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Mathematical models have also revealed that food webs may be unstable , where small changes of top predators can lead to big effects throughout entire ecosystems .
数学模型也揭示了食物网可能是不稳定的,食物网中顶级捕食者的微小变化会对整个生态系统产生巨大影响。
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It is thought that they are capitalising on their predators fleeing to quieter areas .
人们认为,它们是在利用它们的掠食者逃往更安静的地区。
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In the ocean , we fished for top predators such as cod on an industrial scale , while on land , we killed off large predators such as wolves .
在海洋中,我们以工业规模捕捞鳕鱼等顶级捕食者,而在陆地上,我们捕杀狼等大型捕食者。
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In the 1960s , scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species --- including species they did not directly attack .
20世纪60年代,科学家们提出,食物网顶端的捕食者对其他物种(包括它们没有直接攻击的物种)的数量有着惊人的控制力。
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The final part of this chapter was devoted to a brief summary of predator species .
本章最后部分简要总结了食肉动物。
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Predator : Intoxication-Damage over time effect will now stack with other allies . Predator : Intoxication ,
持续性伤害的效果将会与队友相加。
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Komodo dragon is the largest living lizard and a fearsome predator .
科摩多龙是目前存在的最大蜥蜴,它是一种令人恐惧的捕食性动物。
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But an innate3 fear of their predators seems , according to this research , to give the reds an edge over their grey competitors .
但根据这项研究,对掠食者与生俱来的恐惧似乎让红松鼠在其竞争对手灰松鼠的面前占有优势。
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Different populations living together and interacting . Populations can interact as competitors , predator and prey , or symbiotically .
不同生物族群生活之间的互动,以相互竞争、食或共生的方式生活著
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If abandoned recklessly , they ’ re basically defenseless against natural elements and predators like cats , snakes , and monkeys .
如果随意遗弃,它们基本上无法抵御自然因素和天敌,如猫、蛇和猴子。如果你正在饲养宠物,或者有此打算,无论他们是小猫、小狗、小乌龟,或是一只小鸡,请记住养宠不抛弃!
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birds and their earthbound predators
鸟和地面上捕食它们的动物
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A synchronised spectacle of breathtaking beauty . The starlings migrate in winter , south to Africa , nesting at night in central Rome for warmth , flying in formation to avoid predators .
群鸟齐飞,蔚为壮观。欧椋鸟在冬天南迁到非洲,晚上在罗马市中心筑巢取暖,排成编队飞行以躲避捕食者。
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Analysis of a Holling Type ⅲ Predator System with Impulsive Effect
具有脉冲效应的HollingⅢ系统的动力行为
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Study on statistic model of functional response of predator to prey
捕食者&猎物功能反应的统计模型研究
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Equation of predator functional response and estimation of the parameters in it
捕食性昆虫的功能反应方程及其参数的估算
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This paper investigates the predator prey system with functional reaction function x .
研究了功能反应为x的食饵-捕食系统的渐进性。
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The searching efficiency decreased with increasing of predator density .
,小黑瓢虫寻找效应随着捕食者密度的增加而下降。
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The effect of diffusion on predator - prey system in patches
扩散对斑块上食饵-捕食种群生存的影响