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Fort Randall South Dakoa Dam Big Sioux River rower unrc Lewis and r--:..Lake Niobrara Nebraska Scale: 1 centimeter - 18.1 kilometers 9n:MnviIIe Kansas CPUE was reported as the tftTTTnher of larvae per 1,000 m3 of water strained. L.rva1 fish were iden- tified to species, except thai;: ~rinids and most suckers were grouped by f8lIIiip-(Auer 1982). Larval blue sucker however, were :identified to species (Hogue et al. 1981). Status of Selected Fishes River Chubs in the iVi;"ouri River , Five species of chubs were-.~'lnon in the Mis- souri River before it was ~nelized and im- POunded, including sturgeondimbs, sick1efin. chubs, flathead chubs (platygobio erar:ilis), silver chubs (Macrhybopsis storeriana), an&U~ed chubs (M. aestivalis ). StUl'geon chubs were follnli.'.in the Platte River at Grand Island, and in Ba.zi1e~k near Niobrara (Everman and Cox 1896). John - "1.1 (1942) collected thexn throughout the Platte, &eoubli~ Elkhom, and Missouri rivers. Sicklefin.~ were collected by Meek (1892) and Johnson. (:1942) from the Mis- ~uri River and by Morris (19tiO) from the Platte River. Flathead chubs wert!' :found extensively throughoutmoetofNebraska."'~yc,n,(Jones 1963). M9''''';-'L':N'''ii''''''JI...'l\'I>i'"~'iI4il--;(....,;_,,\.,::;:kJrn-'1m-~:;~~ m1 ~,-~;:1 LARRY W. HEsSE ET AI... 329 \ Iowa Figure. Map of the Missouri River show- ing the lowermost dams and unchan- nelized and channelized segments. They were reported from all drainages except the Big Blue and LitUe Blue river systems (Johnson 19(2). Silver chubs were distributed throughout the Missouri, Plate, E1khom., Loup, and Republican rivers (Evennan and Cox 1896; Johnson 1942; Har- lan and Speaker 1956; Morris 1960). Johnson (1942) found speckled chubs in the Platte, Elkhom, Loup, and Republican rivers, and Meek (1894) col- lected them in the Big Blue River. Cross (1967) reported sturgeon chubs as widely distributed in the Missouri and Kansas rivers; sicklefin chubs were found m the Missouri and Mississippi rivers downstream. from the Missouri River confluence, flathead chubs were primarily restricted to the Missouri, silver chubs were common only in the Missouri and Kansas rivers, and speckled chubs were common in the shallow side channels of the Missouri. Bailey and Allum (1962) reported stur- geon chubs from the Missouri and its largest west- ern tributaries-the White, Cheyenne, and Grand rivers. Sicklefin chubs do not ascend the Missis- sippi beyond the confluence with the Missouri, and they reported its upstream. limit in the Missouri River as the mouth of the Little Missouri River in North Dakota. Flathead chubs were reported to be the dominant minnow in the turbid Missouri and its larger westem. tributaries in South Dakota. <, ,',..,~ tJ