他们对捕食数百万幼小牡蛎的动物天敌也所知无几。
And they knew little about the predators that attack and eat baby oysters by the millions.
竞争者和动物天敌通常也不会到达这个小岛，但是深海的竞争和掠食却很猛烈。
Also, the competitors and predators of a species often don't reach an island, but competition and predation in the deep sea can be intense.
由于没有天敌，又有大片绿色的郊区禁止捕猎，野生动物官员估计，新泽西鹿的数量已经超过17.5万只。
With no natural predators and expanses of green suburban neighborhoods that allow no hunting, wildlife officials estimate the New Jersey deer population to have grown to exceed 175,000.
对很多动物来讲，泡在水里的这种行为太危险，因为河马呆在水里时很容易受到天敌的伏击。
For many animals, this would be too dangerous, because watering holes are ideal places for predators to ambush their prey.
以前在骨头上发现的牙印，大部分不是攻击性天敌留下的猎伤就是食腐动物在其死后撕扯的痕迹。
Tooth marks on bones have been found before, but often as damage left by attacking predators or scavengers that tore at the carcass after the animal died.
许多动物通过向它们经验更丰富的同伴学习而获得诸如捕猎、觅食或躲避天敌的一些技能。
Lots of animals learn from their more experienced peers to gain skills such as hunting, foraging or evading predators.
由于浮游植物的分布变得更为广泛，它们的天敌（浮游动物）的定位和进食也变得困难起来。
Since the phytoplankton are more widely distributed, predators (zooplankton) have a harder time locating and feeding on them.
如果小动物缺乏天敌，如一些蝙蝠，他们就可以像大型动物一样存活数十年之久。
If they do not, as for some species of bat, then even a small creature can live for decades in just the way that a large animal would.
但这种关系只是一种巧合：小动物的天敌通常都远多与大动物。
That relationship, however, is just a coincidence caused by the fact that small beasts usually have more predators than large ones do.
而且由于其体积大，鲜有天敌，鲸鱼和其它大型海洋脊椎动物可以有效地吸收海水表层的碳，将其输出到深海。
And because of their size and few predators, whales and other big Marine vertebrates can efficiently export carbon from the surface waters to the deep sea.
但对农夫或害怕各类耗子的人来说，这也是一条坏消息：因为啮齿动物的天敌更少了。
Bad news for farmers and those afraid of rats and mice: rodents now have fewer predators to outsmart.
她指出蛇是早期灵长类动物的第一天敌，并导致了人类对蛇的相对敏感的视觉系统进化 --这样可以快速的发现蛇类 --这使得我们今天仍可以受益 。
She figures snakes were the first predators of early primates and contributed to the evolution of relatively good vision — useful for spotting snakes — that we enjoy today.
在园林，动物找到一个充足的供应，他们需要的东西：食物，水，保护天敌，并筑巢地点。
In gardens, animals find an ample supply of the things they need: food, water, protection from predators, and nesting sites.
我们中的一个野生动物管理员甚至看到鹿和土狼——这对天敌——一起站在同一块防洪提上。
"One of our wildlife managers even spotted deer and coyotes" -natural enemies - "standing on the same levee together."
生物界有一个共识，那就是没有天敌的动物多半会灭绝，而敌人越强大，其进化速度则越快，适应能力也更强。
Biological community there is a consensus, that is no predators animals are mostly extinct, and the enemy is more powerful, the evolutionary speed is faster, stronger ability to adapt.
有趣的是，当恐龙灭绝以后，一群动物失去了天敌，它们也慢慢开始退化，最终灭绝或丧失了原本的生存能力。
Interestingly, when the extinction of the dinosaurs, a group of animals lose their natural enemies, they slowly began to degenerate, the ultimate extinction or loss of the original survival ability.
狼是某些大动物的天敌，比如：鹿和野牛。它们也吃兔子、老鼠和野果。
Wolves are natural enemies of some large animals, such as deer or bison. They also eat rabbits, mice, and wild fruit.
大象是陆地上最大的哺乳类动物，除了人类之外几乎没有其他的天敌。
An elephant, which is the earth's largest land mammal, has few natural enemies other than human beings.
动物需要用植物来掩护自己以躲避天敌和安全地抚育自己的孩子。
Animals need cover to hide from their natural enemies and to raise their young safely.
小动物们在海边没有植物可以遮蔽，很容易被天敌发现了吃掉。
Without ocean plants on the seafloor to hide in, small animals are more exposed to the predators that hunt them for food.
它们的具体数量尚不清楚，目前也不属濒危动物，也没有天敌。
Their population Numbers are unknown, and they do not currently appear on any lists of endangered or vulnerable animals.
为了更好地开展对玉米田天敌的研究和利用工作，以及对玉米害虫的综合治理工作，进行了玉米田节肢动物的种类构成成分调查。
The composition of Arthropod species in maize fields in Daqing was investigated in order to study the natural enemy and its use work, to develop the work of integrated pest manage to the cornfield.
在一个节肢动物群落中总个体数与种类数、天敌总个体数与害虫总个体数具有灰正相关关系。
There is a grey positive correlation between Numbers of the total individuals and the total species, individual Numbers of the pests and their natural enemies in a arthropod community.
但同时，绿色也保护着人类的天敌及其它猛残的食人动物。
But at the same time, green also protects the natural enemy of mankind and other fierce incomplete meal person animal.
两个动物对这个游戏都很感兴趣，甚至忘了它们是天敌。
Both animals became so interested in the act (as well as the praise and food they received after the act) that they forgot they were natural enemies.
从捕食性天敌的角度研究了稻田节肢动物种库对其群落重建的作用。
The effects of species pool on community reestablishment were studied from a facet of predatory arthropod community.
从捕食性天敌的角度研究了稻田节肢动物种库对其群落重建的作用。
The effects of species pool on community reestablishment were studied from a facet of predatory arthropod community.
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