Wednesday, March 5, 2008
How the Minnows Were Lost
Here is another story about the devastating effects of hormonal contraception on the underwater ecology. It seems scientists can crush the population of Canadian fathead minnows by exposing them to artificial estrogen at 5 parts per trillion. The male fish start producing eggs, instead of sperm, after two years of exposure and the population plummets. Who would have thought that the use of birth control leads to rapid declines in exposed populations?