rotenone

(Newser) - California fisheries officials pumped an 11-mile stream full of poison yesterday, killing all the fish in it—in what, believe it or not, is a conservation plan. State officials are trying to preserve the Paiute cutthroat trout, the rarest trout in the world, the LA Times explains. It's native...

(Newser) - The 3-day, $3 million attempt to purge a canal leading to Lake Michigan of invasive Asian carp has so far yielded just a single dead specimen. Biologists are still sifting through the tens of thousands of other fish poisoned in the purge, the largest deliberate fish kill in Illinois history....