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Distribution of Fishes in the Red River of the North Basin on Multivariate Environmental Gradients

Cyprinidae

Flathead Chub

Platygobio gracilis (Richardson), the flathead chub, has been reported only once from the Red River basin (Figure A42). Renard et al. (1985) collected a single specimen from the Red River south of Grand Forks in 1984, during what has turned out to be the most intensive survey of fishes ever completed in that stream. It is unknown how this specimen entered the Red River basin. Bait bucket transfer is one possibility, however, since the flathead chub occurs in the Nelson River drainage in Canada. Scott and Crossman (1973) describe its abundance in Lake Winnipeg and the Assiniboine River in Manitoba. It is possible that the flathead chub entered the Red River in Manitoba and gained access to the system in the United States.

Figure A42. Distribution of the flathead chub in streams of the Red River of the North basin.

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