While the rough-skinned newt produces a potent neurotoxin to deter predators, the Crater Lake newt is adapted to being at the top of the lake’s aquatic food chain and lacks ... by preying on the ...

Crayfish also compete with newts for food, as both species feed on invertebrates. Where crayfish are present, invertebrate populations have been decimated. Crater Lake is part ... that by preying on ...