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Sampling locations of marine and freshwater stickleback populations from southcentral Alaska. Inset: Geography of Cook Inlet near Anchorage, AK. Marine stickleback were sampled from Rabbit Slough (RS, red). Freshwater stickleback were sampled from Boot Lake (BT, dark blue) and Bear Paw Lake (BP, light blue). All areas in the inset were glaciated during the Late Wisconsin glaciation until ∼10,000 years ago.
