ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

Download this stock image: ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at the tail waters of the Big Bend Dam in Fort Thompson, S.D. A paddlefish population that dwindled to worrisome lows has been rebuilt over the last 30 years by restocking programs. And the state Game, Fish & Parks Commission re-opened the area to paddlefish snagging Tuesday, May 1, 2012 for a month long season with a limited tag system. (AP Photo/Rapid City Journal, Ryan Soderlin) - 2P6ED6J from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

Big Bend Dam, South Dakota, map 1966, 1:24000, United States of America by Timeless Maps, data U.S. Geological Survey Stock Photo - Alamy

Proceedings of the South Dakota Academy of Science. Volume - PDF Free Download

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

Final Program - Society for Integrative and Comparative Biology

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

Final Program - Society for Integrative and Comparative Biology

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at

ADVANCE FOR SUNDAY MAY 13 - In this May 1, 2012 photo, South Dakota Game, Fish and Parks fisheries biologist Jason Sorensen measures a paddlefish caught by Jim Cadwell of Chamberlain at