Iowa Code § 481A.3: Conclusive presumption.

Any person catching, taking, killing, or having in possession any of such fish, mussels, clams, frogs, game, animals, or birds, their nests or eggs, or other wildlife in violation of the provisions of this chapter, shall be held to consent that the title to the same shall be and remain in the state for the purpose of regulating and controlling the catching, taking, or having in possession the same, and disposing thereof after such catching, taking, or killing.