Officials in US Look for Fixes to Carp Problems

From the creator

This is the VOA Special English Agriculture Report, from http://voaspecialenglish.com Last week our subject was illegal fishing. Now we report on two cases where fish are both the victims and the offenders. The first involves two kinds of Asian carp, bighead and silver. They can grow more than a meter long and weigh up to forty-five kilos. They eat huge amounts of plankton that other fish need to survive. Silver carp can also jump high and hit people in boats. Asian carp were brought to the United States in the nineteen seventies as a solution. They were imported to eat algae and other microscopic organisms. They were put to work as cleaners at fish farms along the Mississippi River and in wastewater treatment systems. But now the fish are moving north toward the Great Lakes. They are making their way up a system built years ago to link the Mississippi to Lake Michigan. The dangers of an invasion are environmental and economic. The destructive carp could spread within the Great Lakes and threaten fishing and trade. The Army Corps of Engineers has put an electric fence in the Chicago Sanitary and Ship Canal. The underwater barrier is meant to shock the carp into turning back. Only one Asian carp was found among many thousands of fish killed with poison while part of the fence was being serviced. The barrier, however, may not be enough to protect the Great Lakes. There are calls in Congress for emergency action. Officials could close s

Published 2010-01-06 · Watch on YouTube ↗
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