Nov 14, 2009

Where the fish are easy and the crowds are light

The US Army Corp of Engineers is planning some scheduled maintenance on the last line of defense against Asian carp invasions into the Great Lakes and beyond.  Part of the maintenance plan is some easy fishin'.

  • Rotenone affects all species of fish, although susceptibility to the chemical varies between species.  The chemical inhibits a biochemical process at the cellular level making it impossible for fish to use oxygen in the release of energy needed for body processes.

Though a noble cause, I think the electric barrier will ultimately prove inadequate.  All it takes is a power outage or some other equipment failure for these pesky invaders to find their way to the the eastern sea board.  None the less, while there is still a fight to be had we better keep fighting.  The Mississipi river basin is a lost cause, but the Great Lakes aren't....yet.

When you hear "Asian carp" you might think of bizarre YouTube videos, odd-ball red-neck fishing tournaments or even the new sport they inspired, but their proclivity toward spawning multiple times per season leads to extreme over population (see here for an example.)  Given a Big Head carp's tendancy to consume 40% of it's body weight per day, over population can quickly become an issue.

Imagine Captain Sully ditching in the Hudson due to jet engine injestion of "at least one" flying fish.

1 comment:

  1. For decades, fish and environmental agencies of Canada and the U.S. have been eradicating non-desired fish from lakes and rivers by use of "simple solutions" - piscicides - fish poison. Public concern has called for more research on the safety of such materials, but only favourable, inconclusive or incomplete study results have been released. In the mean time, the controversial practice continues. Primarily used toxins are Antimicyn-A and Rotenone. Both chemicals are being used as base in variations with many other dangerous ingredients that are highly toxic to aquatic life, alter entire eco-systems and pose serious threats to human health. The repeated use of poison has not stopped non-native fish from reappearing by natural migration or reintroduction by anglers. Read more at:


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