However, if safe areas like those prey animals have in the wild are provided, the prey population drops to low level but not extinction.
然而，如果能给被捕食的动物提供一些它们在野外时那样的安全区域，它们的数量会降到很低但不灭绝。
The real extinction problem, he says, is human population pressure: habitat destruction, pesticide abuse, overharvesting, and species invasion.
他说，真正的灭绝问题是人类的人口压力：居住地的破坏、滥用杀虫剂、过度捕杀、物种入侵等。
So space constraints likely kept population Numbers low-making the giant crocs vulnerable to extinction in tough times.
对空间的需求很可能导致其种群数量偏低，以致于在遭遇困难时期，这些巨型鳄鱼更容易灭绝。
The disease "is having a very serious impact on the wild population, but at this stage we don't believe that the species is headed for extinction," Scott said.
对此，斯科特表示，这种疾病“已经给野生的袋獾种群造成了非常严重的影响，但科学家们相信，在眼下这段时期内，袋獾还不会从塔斯马尼亚的栖息地灭绝。
A mere 5 per cent of the global population speak the rest and two thirds of these lingos are in danger of extinction.
仅有5%的人说剩下的语种，其中有三分之二都濒临消亡。
And one antelope in particular, the Arabian Oryx, which was hunted to near extinction, now has a wild population of over 1,000.
特别地，被猎杀至近乎灭绝的一种羚羊——阿拉伯羚羊，现在野生数量已超过1000只。
Efforts over the past decade to save British mammals from extinction have failed to halt population declines in red squirrels, hedgehogs, harvest mice and Scottish wildcats.
过去十年间，人们为拯救英国哺乳动物使其免于灭绝的努力并未能遏制住红松鼠，刺猬，巢鼠和苏格兰野猫数量的下降。
The researchers documented changes to extinction risk, where species are moving most rapidly toward zero population.
研究人员记录了会导致灭绝风险的物种数量变化事件，在这些事件中，物种的数量快速降到零。
The survival environment analysis to protected species is the important means to detect the population decline and extinction reasons.
通过对被保护物种生存环境的分析是探知该物种灭绝和种群数量下降的重要手段。
And as the human population increases, driving more animals and plants toward extinction, a species' second home may be the only one it has.
而随着人口增长，越来越多的动物植物将走向灭绝，一个物种的第二家园，也许将是它们唯一的家园。
Their research showed that when the number of trap cells exceeded a key threshold in the mixtures, the virus population could no longer sustain itself and declined toward extinction.
他们的研究显示：当诱骗细胞的数量在混合物超过一个关键阈值时，病毒群不能再自我维持并趋向灭绝。
Unfortunately, the general population fails to see that sharks are a vital component of our oceans because they maintain balance in our underwater ecosystem and, now they are facing extinction.
很不幸地，一般民众却不了解鲨鱼是海洋中必需的生物，因为鲨鱼能维持水中生态系统的平衡，不过，牠们现在却面临绝种的命运。
Taking only this uncertainty of ability to reproduce into account, extinction is unlikely if the number of individuals in a population is above about 50 and the population is growing.
只考虑这些不确定的繁殖能力，灭绝不太可能如果个体的数字在一个种群数量超过50并且种群数量在增长。
The invasion of bullfrog has become one of the main factors leading to population decline and extinction of some native amphibians.
牛蛙的入侵已成为一些本地两栖类种群数量下降或灭绝的主要因素之一。
Sufficient criteria on uniform persistence, weak persistence and extinction of the consumer population are obtained by using mainly the comparison theorem.
主要运用比较定理得到了种群一致持续生存、弱持续生存以及绝灭的判据。
The process from immigration and fromation of the population to its extinction covers 3 to 4 generations.
从迁入建立种群到种群最终消失，可发生3～4个世代。
Under pressure from humans, the chimpanzee has suffered population decline, habitat fragmentation, and in some places local extinction.
在人类的压力下，黑猩猩们面临了人口下降，栖息地破坏，还有某些地方的灭绝。
It is indicated by the graph that the extinction of some species of wild animals is closely related with the sharp increase of the worlds population.
这张曲线图表示，某些野生动物物种的灭绝与世界人口的猛增密切相关。
The speeds of habitat destruction and species extinction reach the climax during the past 200 years because of rapid human population growth and advances in technology.
在过去的200年里，生境毁坏和物种灭绝的速度已经达到了史上最大。
The essential reason for the extinction of rhinoceros in China was human population pressure.
犀牛在中国灭绝的根本原因是人口压力。
Yangzonghai event is more a extinction accident of biotic population then merely a environmental incident, which caused from the immoralism of human being for the animals right.
阳宗海事件不仅是一次环境污染事故，更是一起生物物种的灭绝事件，起因是人类对动物生命安全的漠视。
Yangzonghai event is more a extinction accident of biotic population then merely a environmental incident, which caused from the immoralism of human being for the animals right.
阳宗海事件不仅是一次环境污染事故，更是一起生物物种的灭绝事件，起因是人类对动物生命安全的漠视。
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