RE: NANFA-- Bighead, silver carps

Hoover, Jan J ERDC-EL-MS (
Fri, 29 Aug 2003 17:40:56 -0500

Jan posted:
>> ST. LOUIS (AP) -- Crazy carp have invaded Missouri's rivers. Two species
>> of nonnative carp have been jumping into boats, injuring occupants and
>> damaging the watercraft...."The sound of a propeller under water makes
these fish go crazy,'' Todd
>> said. ``The fish don't jump if you're sitting there without the motor on,
>> but the higher the RPMs, the greater the noise, the higher these fish
>> jump.''

Kevin replied:
I've actually seen a video of this. It was pretty bizarre.

Jan responds:
It can be a dramatic sight. But a running propellor isn't required to make
the fish jump. Other kinds of disturbance work just as well. Last weekend,
NANFA members Tyler Strange and Heather Smith, my wife Dena, and I, were
sampling floodplain pools left behind by the receding Mississippi River. As
we walked about in the shallow, warm water, silver carp would leap into the
air behind us, apprently disturbed by the muddy wakes we were creating as we
recorded water depth and dragged a seine. Those caught in our net were
approximately 220 mm TL. We were showing a group of bird enthusiasts how we
sample fishes in floodplain pools. Many of them had heard of the giant
Asian carps but had never seen or handled one.
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