1. How much money is spent to manage and
control zebra mussels and purple loosestrife?
2. Because of this species' invasion, the fishing industry is expected
to lose $119,000,000.
3. Using chemicals is a good way to
control sea lamprey.
False 4. It is estimated that the 15 most recent species introductions
will be very costly to the U.S. economy. If there were 10 additional
introductions by 2050, would it cost more or less than $134,000,000,000?
5. Sea lamprey almost wiped out the
lake trout population. Why would this create problems?
The trout supply went down from 15,000,000 pounds in the 1930's to 300,000
pounds in the 1960's.
Fishermen lost jobs.
The cost to buy trout for the average family went up after
the sea lampreys invaded.
All of the above
This activity was written by Jennifer Fackler,
Illinois-Indiana Sea Grant, funded
by National Sea Grant College Program.