1836, John Richardson, Fauna Boreali-Americana, part 3, The Fish (published in London), page 14:
The Okow inhabits the rivers and lakes of the fur countries up to the fifty-eighth parallel, and is, in all probability, the same species with the L. Americana. […] The Okow spawns in May, soon after the ice breaks up.
1836, Richard King, Narrative of a journey to the shores of the Arctic Ocean in 1833, 1834, and 1835, volume 1, pages 181-182:
During my passage into the country I ascertained also another fact, […] as regards a doubt which has long existed, whether the perca fluviatilis, okow, or horn-fish of Richardson, is identical with the lucioperca Americana, or American sandre.
