An innocent gift from Chicago to Prince Akihito in 1960 caused a decades-long ecological crisis that Japanese scientists are now close to solving
When Crown Prince Akihito visited Chicago on October 3, 1960, his sole request was to visit Shedd Aquarium. Then-Mayor Richard J. Daley, an avid angler, presented the prince with a gift that he scooped with a net from one of the tanks himself: 18 bluegills, the official Illinois state fish.
Fortunately, science has marched on in 60 years. Now, Japanese geneticists are experimenting with the gene editing wizardry of CRISPR to sterilize the invasive bluegills. If the initiative succeeds, wildlife managers could use the same technique to rid the U.S. of damaging aquatic invasives such as the Asian carp.
But in the meantime, the fish thrived unnoticed in the wild, multiplying in Japan’s rivers, lakes, and streams, expanding its diet beyond insects, plankton, and aquatic plants to shrimp and native fish eggs. In their North American habitats, bluegills reproduce quickly and live for a long time, whereas in Japan, native shoreline fish had temporarily kept the bluegill population under control by eating their eggs and juveniles.
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