MNR, Geological Survey ship count Lake Superior fish

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MNR, Geological Survey ship count Lake Superior fish

 

 

November 18, 2008 / tbsource.com

 

 

Officials with the MNR and the U.S. Geological Survey have been trawling the North Shore of Lake Superior in the middle of the night, trying to find out just how many lake herring, or ciscoes, there are in this area.

The MNR and U.S. Geological Survey have been busy this week as they try to measure the herring stocks on this side of Lake Superior.

 

It's a species that is not only difficult to count, but difficult to catch as well, as they manage to avoid being caught in nets during the daytime.

 

U.S. geologist Dan Yule said his crew does their best work at night, using a combination of sonar equipment and trawling nets.

 

The ciscoes feed on plankton, and help the food chain by becoming food themselves for larger fish in Lake Superior.