It's hard to watch these predations, but death is a crucial part of the natural cycle.

这样的捕食画面让人心酸，但生死轮回是大自然的一种循环。

When released from the threat of predation, then, females tend to be gaudier.

一旦没有天敌的威胁，雌性就变得更花哨。

The study of coprolites tells you key information about an animal's diet and predation habits.

对粪化石的研究告诉了我们关于动物饮食和捕食习惯的关键信息。

And finally, predation is a more likely reason for the uneven pattern of otter decline.

最后，捕食更有可能是水獭下降分布不均的原因。

The thing about predation is it's very dangerous, both for the prey and for the predator.

捕猎的过程非常，对于猎物和捕猎者都如此。

So in this case there's across-protection mutualism between these two species in which they help to avoid predation.

“因此在这种情况下这个物种就形成了互惠共生关系。”

Ongoing investigations have shown that predation is the most likely cause of the sea otter decline after all.

调查显示，捕食是水獭数量减少的最可能的原因。

Rather, it's a way to more quickly outgrow a stage where they're especially vulnerable to predation or dangerous environmental conditions.

同类相食是更快的长大，跳出一个它们很容易捕食，或的环境条件影响的阶段。

Which is why researchers set out to look for proof that human predation played a role in the demise of Genyornis.

因此研究人员们搜集证据，希望找出远古人类的捕猎对这种巨鸟灭绝产生的影响。

So what we are studying now is whether natural selection imposed by predation could explain the occurrence of iridescence in prey animals.

“因此，我们现在正在研究的是，捕食所施加的自然选择是否能解释猎物身上出现彩虹色的原因。”

But unlike snakes and other animals that use venom primarily for predation and defence, the platypus uses its venom for a different reason.

但与蛇和其他主要利用毒液捕食及防御的动物不同，鸭嘴兽使用毒液另有他因。

Before civilisation intervened, such chronic loneliness would have been so rare (because isolated individuals are so vulnerable to predation) that evolution would have ignored it.

在文明到来之前，这种常态性的孤独非常罕见（因为单独的个体易捕食），进化就把它忽略了。

The larger a shoal is, the smaller is the proportion of it that needs to know what is actually going on for it to feed and avoid predation effectively.

鱼群越大，需要知道接下来做什么才能有效觅食和避免的“领导”比例就越小。

The brain structure of Albertosaurus would tell us it was able to do ambush predation, it probably had the brain power to be a pursuit predator.

阿尔伯特龙的脑部结构告诉我们它能够进行伏击掠食，它很可能有足够的脑力成为追击掠食者。

If one nest proves susceptible to some environmental factor—be it disease, predation, or even a cold snap or wet spell—then it is likely that all the other colonies will share that vulnerability.

如果一个巢穴容易受到某些环境因素的影响——不管是疾病、掠食，亦或是寒流、潮湿期——那么极可能其他的聚居群也有着同样的弱点。

The passage states that pollution was the cause of the declining population of sea otters, while the lecture states that predation is the most likely cause of the decrease in sea otter populations.

文章说污染是导致海獭数量减少的原因，而演讲则指出捕食是海獭数量减少的最可能的原因。

The herbivore bones that were found in the cave show no signs of predation, so this tells us that nothing that went into that cave lived to eat the bodies of the other victims.

在洞里发现的植食动物骨头没有食用的迹象，所以这说明没什么能够活着进入洞穴吃掉其它牺牲者的尸体。