The Sturgeon survived whatever killed the dinosaurs and have struggled against habitat destruction and overfishing
. Now many of its 25 species are endangered, but a small pocket in upper Wisconsin boasts of having one of the world's largest concentrations of the fish. The success is because of the state's strict spearing limits, poaching laws, restocking efforts and well-protected spring spawning
. Now many of its 25 species are endangered, but a small pocket in upper Wisconsin boasts of having one of the world's largest concentrations of the fish. The success is because of the state's strict spearing limits, poaching laws, restocking efforts and well-protected spring spawning
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