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Tiny number of Asian carp could be big problem for the Great Lakes
Date:9/11/2013

bility of Asian carp establishment changes dramatically if only 10 of the creatures are introduced. With 10 fish, the probability of a population of Asian carp is only 50 per cent, but with 20 fish, it jumps to 75 per cent, under some conditions.

Maturation rates for this invasive fish also play a significant role in positive population grown rates. According to Professor Cuddington, if the fish typically reach maturity within three years, then it will take about 20 years to reach to establish a moderate population, and between 40 and 50 years for that population to become very large. If cooler water slows down fish development time to five years, then the fish population might take more than a century to establish.

Asian carp were introduced to the United States in the 1970s as an agricultural fish used to combat algae in catfish ponds. They escaped into the Illinois River during the floods of the 1990s and later entered the Mississippi River. With recorded densities of 13 tonnes of fish per river mile in the Illinois River, the dangerous flying carp phenomena has schools of fish jump upwards of 10 feet sometimes injuring boaters. Anglers armed with crossbows take to the water to capture the large fish during sport fishing tournaments.


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Contact: Nick Manning
nmanning@uwaterloo.ca
519-888-4451
University of Waterloo
Source:Eurekalert

Page: 1 2

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