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

Percopsidae

Trout-perch

Percopsis omiscomaycus (Walbaum), the trout-perch, was reported by Kennicott from the "North Red River" near latitude 46° and the Maple River (SI 1994). The year the collections were made is unknown, but was probably 1857. Young collected it from the Sheyenne River in 1921 (UMMZ 1994), Woolman (1896) listed P. guttatus from the Red, Pembina, Goose, Sheyenne, Otter Tail, and Red Lake Rivers; Hankinson (1928) collected it from the Red, Pembina, Park, and Sheyenne Rivers; and Hubbs and Schultz collected it from the Sheyenne River at Valley City in 1926 (UMMZ 1994) (Figure A56). Olson (1932) reported the species from the Buffalo, Sandhill, and Red Lake Rivers; and Deason and Nelson collected it from the Mud River, a tributary to lower Red Lake, in 1938 (UMMZ 1994). The trout-perch has been taken primarily from the Red, Pembina, Sheyenne, Buffalo, and Roseau Rivers. The species has been most common in the NMW ecoregion, where it has been taken at 45% of sites (Table 4). Typical collections have consisted of 1-10 individuals, but the species has been extremely abundant in reaches of the Roseau River; where samples containing several hundred individuals were taken in 1976.

Figure A56. Distribution of the trout-perch in streams of the Red River of the North basin.

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