Kerry Graves, second from left, manager of the Tishomigo National Fish Hatchery, and Pete Diaz, right, Texas aquatic biologist, implant radio transmitters into paddlefish with the help of biologist Aaron White, left, and Matt Cooper, second from right, at the Tishomingo National Fish Hatchery in Tishomingo, Okla., Wednesday, Feb. 19, 2014. (AP Photo/Sue Ogrocki)
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