The species of interest to Dr Wirgin is the Atlantic tomcod of the Hudson river in upstate New York.

Wirgin博士感兴趣的试验种群是位于纽约哈德逊河上游的大西洋小鳕。

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But in the Hudson, fish with the gene to make the mutant receptor have thrived, while those without it have died out, Wirgin notes.

在哈德逊河中，拥有变异基因的鱼类蓬勃发展，那些没有变异基因的鱼都已经死光光了。

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If that happens, Dr Wirgin and Dr Hahn will be watching.

ECONOMIST: Pollution and evolution