这种鲨鱼状的动物属于神秘的银蛟类。 银蛟可能是现存最古老的鱼类之一，人类对它的研究少之又少。
The shark-like animal belongs to the mysterious and little-studied chimaeras, perhaps the oldest group of fish alive today.
数据显示我们必须采取更多措施来保护现存的鱼类资源，研究者说，他们已经对全球鱼类供应的主要问题进行了研究。
The data shows more must done to ensure existing fish stocks are protected, said the researchers, who have done other studies outlining problems with the world's fish supplies.
比较而言，科学估计有大概100万种昆虫、28000中现存的鱼类，1万种鸟类和5400种哺乳动物。
For comparison there are more than 1 million species of insects listed by science, 28, 000 living species of fish, 10, 000 birds and 5, 400 mammals.
比较而言，科学估计有大概100万种昆虫、28000中现存的鱼类，1万种鸟类和5400种哺乳动物。
For comparison there are more than 1 million species of insects listed by science, 28,000 living species of fish, 10,000 birds and 5,400 mammals.
如果将关注食物链顶端和底端的方法同时应用到全球性数据上，那么，科学家们得出的结论是，过去10年的工业捕渔更偏向捕食低食物链鱼类，而对高食物链等级的鱼类而言，它们的食物总量减少了将近一半，倘若按照食物链理论的逻辑，现存高食物链等级的鱼类总数是增加了而不是减少了，因此，不能够简单地认为，工业“捕渔”导致鱼类总体的数量减少。
Applying both methods to worldwide data, the scientists say industrial fishing over the past decades has not simply worked its way downwards from the top of the food chain -- it has gone upwards, too.
如果将关注食物链顶端和底端的方法同时应用到全球性数据上，那么，科学家们得出的结论是，过去10年的工业捕渔更偏向捕食低食物链鱼类，而对高食物链等级的鱼类而言，它们的食物总量减少了将近一半，倘若按照食物链理论的逻辑，现存高食物链等级的鱼类总数是增加了而不是减少了，因此，不能够简单地认为，工业“捕渔”导致鱼类总体的数量减少。
Applying both methods to worldwide data, the scientists say industrial fishing over the past decades has not simply worked its way downwards from the top of the food chain -- it has gone upwards, too.
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