For those of you interested in invasive species, then bighead and silver carp entering the Great Lakes will provide an interesting case study. For everyone else, this poses a huge problem, as silver carp and bighead carp are some of the most voracious river feeders in the world, and will swiftly push native populations to extinction. Even worse, silver carp can jump up to ten feet out of the water, injuring nearby boaters--an Arkansas teen had his jaw broken by one of these fish (http://wcco.com/watercooler/Arkansas.teen.carp.2.812463.html).
The sad thing about all this is that the carp were intentionally introduced in the 1970s in order to limit algae growth in southern fish farms. Thirty years later federal and state naturalists are forced to resort to poisoning a 6-mile stretch of river in the hopes of slowing the tide of the invasion. http://www.nrdc.org/media/2009/091202.asp
