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Upper Midwest Environmental Sciences Center

Paddlefish Study Project

Paddlefish Study Methods

Paddlefish were captured with nets.
netting the paddlefishpaddlefish placed in holding tank
Transmitters were surgically implanted in the paddlefish.
paddlefish surgerypaddlefish transmitters
The fish were released into 4 locations in the Mississippi River and tributaries.
The radio-receiver could detect the transmitters up to 1 mile. Scientists attempted to locate the paddlefish by boat 2-5 times a month to collect data about their movements and habitats. In the winter, a Hovercraft was used to track tagged paddlefish when the river was frozen.
locating the paddlefishhovercraft
An airplane equipped with a 1/2-wave wire antenna was used by scientists to monitor general movements of radio-tagged paddlefish and locate missing fish. Aerial surveillance was extensively used by biologists from the La Crosse Fishery Resources Office, an important study cooperator, to track paddlefish movements in Lake Pepin (Navigation Pool 4, Upper Mississippi River).

LFRO biologists included aerial surveillance as a method of tracking paddlefish in Lake Pepin

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Page Last Modified: January 29, 2016

March 1, 2007