For decades, aquariums have tried to contain the world's largest predatory fish.

几十来，各家水族馆试图容纳世界上最大的捕食性鱼类。

So do you kill the introduced predators to save the endangered species?

所以，要杀的捕食性动物来拯救濒临绝种的物种吗？

Tom Gable is tracking a predator. In fact, he's tracking a whole pack of them.

汤姆·盖博在追踪一个捕食性动物。事实上，他在追踪一大群动物。

Ecologists have long assumed the predators can influence their ecosystems in two main ways.

生态学家一直认为，捕食性动物可以通过两种主要方式来影响生态系统。

Ants keep predatory insects away from where their aphids feed; Gmail keeps the spammers out of our inboxes.

蚂蚁赶走蚜虫进食处的捕食性昆虫；谷歌邮箱也帮助我们在收件前远离那些垃圾邮件制造者。

Polar bears are pure predators, so they kill other animals to eat. That's how they survive.

北极熊是地道的捕食性动物，它们以猎杀其他动物为生，这是它们的生存方式。

The first was whether they might be able to learn new predators, specifically people, based on their association with dead crows.

第一，它们是否能根据人和死亡乌鸦间的关联辨识出新的捕食性动物，特别是人。

So how did some whales go from chomping predators to filter feeders?

那一些鲸鱼是如何从咀嚼性捕食动物变成滤食动物的呢？

Predators have been observed to avoid attacking brightly coloured species.

【observe】据观察发现，捕食性动物会避免袭击色彩鲜艳的物种。

What predatory adaptations does Velociraptor have that you would be able to observe in the actual fossil?

您可以在实际化石中观察到 Velociraptor 具有哪些捕食性适应性？

This reef has suffered in the last few years six cyclones, two major coral-bleaching events, and various attacks by the predator crown-of-thorns starfish.

在过去几，珊瑚礁遭遇了六次气旋，两次重大的珊瑚白化，还有捕食性动物棘冠星鱼的几次攻击。

They also found predators on the herbivores, in the form of ciliates (a type of protozoan) and predator bacteria, which feed on other bacteria.

他们还发现了以这些食草动物为食的捕食者，存在形式是纤毛虫（一种原生动物）和以其他细菌为食的捕食性细菌。

That's significant because this is a predator and scientists say the fact that it was this deep indicates there are other species down here for it to eat.

这个发现很重要，因为这是一种捕食性动物，科学家认为，它出现在这么深的地方说明那里还有其它物种可供其捕猎。

Like in New Zealand, for example, tons of iconic animals like the Kiwi are threatened by introduced predators, including stoats, which are, like, this cute furry little weasel.

比如，在纽西兰，许多代表性的动物，比如鹬鸵，受到的捕食性动物威胁，包括短尾鼬，它们就像毛绒绒的可爱小鼬鼠。

So, as odd as the starfish body plan seems, something about it was successful -- from their ancient bilateral ancestors, to the radial crinoids with their upward-facing arms, to the predatory, downward-facing starfish.

因此， 尽管海星的身体计划看起来很奇怪，但它的某些方面是成功的——从它们古老的双侧祖先，到手臂朝上的放射状海百，再到捕食性的、面朝下的海星。

Using makeup to paint the backs of both male and female spiders, the researchers made each sex look like the opposite to determine whether that would change the behavior of a much larger jumping spider, the predatorial Phidippus californicus.

研究人员使用化妆品在雄性和雌性蜘蛛的背部涂上颜色，让每种性别看起来都相反， 以确定这是否会改变一种更大的跳蛛— —捕食性 Phidippus californicus 的行为。