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Shovelnose sturgeon from Missouri River

December 6, 2010 | 10:51 p.m. CST
Ecologist Aaron DeLonay, with the U.S. Geological Survey, holds a shovelnose sturgeon netted just east of Jefferson City on the Missouri River that he estimates to be 3 or 4 years old Oct. 29. DeLonay and a small team of scientists go out on the river frequently to check on the reproductive condition of a more rare fish, the pallid sturgeon, to see, and in some cases ensure, successful reproduction. Whenever DeLonay and his team catch a pallid sturgeon that they have not caught before, they implant a tracking device that, other than tracking water depth and temperature, can be used to determine if the fish mated.

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