就是因为这些西伯利亚虎群，已经死掉的这些远远比活著的更值钱。
The reason is the tigers, mostly Siberian, are far more valuable dead than alive.
其分布范围已减少到几小片领地，孤立生存在基因上使虎群的总数更为降低。
Today, their range has been reduced to small patches, isolating many of the animals in genetically impoverished groups of dozens of cats or fewer.
“如果我们再不保护这些核心虎群，那么短短几年间老虎就要灭绝了。”作为论文另一联合作者的罗宾逊感叹道。
"Unless we protect those core populations, within a few short years we could lose tigers altogether," said Robinson, another of the paper's co-authors.
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