. Brimleyana. Zoology; Ecology; Natural history. 60 Fred C. Rohde, Mary L. Moser and Rudolf G. Arndt Rustyside sucker, Thoburnia hamiltoni Raney and Lachner The rustyside sucker is endemic to the upper Dan River system in North Carolina and Virginia (Jenkins and Burkhead 1994). In North Carolina it is known only from the rkm downstream-most portion of the Little Dan River in Stokes County. Here Menhinick (1986) collected four specimens at a point some 400 m downriver of the Virginia line in 1985 (Fig. 11). We made three col- lections in the Little Dan River, from its confluence with the Da
. Brimleyana. Zoology; Ecology; Natural history. 60 Fred C. Rohde, Mary L. Moser and Rudolf G. Arndt Rustyside sucker, Thoburnia hamiltoni Raney and Lachner The rustyside sucker is endemic to the upper Dan River system in North Carolina and Virginia (Jenkins and Burkhead 1994). In North Carolina it is known only from the rkm downstream-most portion of the Little Dan River in Stokes County. Here Menhinick (1986) collected four specimens at a point some 400 m downriver of the Virginia line in 1985 (Fig. 11). We made three col- lections in the Little Dan River, from its confluence with the Dan River upstream to the North Carolina/Virginia line, and took one adult (144 mm SL) in a run with gravel and rubble substrate on 21 December 1992. In Virginia we took three adults (118-142 mm SL) in the Dan River at one site located 365 m, and at anoth- er site 914 m, downriver of the Pinnacles Power Plant on 28 November 1993 (Fig. 11). Both sites were deep and fast rock-strewn riffles, current velocity m/sec, water temperature C, pH , and dissolved oxygen concentra- tion ppm. The distribution of the rustyside sucker in North Carolina is extremely limited, and its continued existence there is precarious. Fig. 11. Distribution of the rustyside sucker, Thoburnia hamiltoni, in the Dan River system, North Carolina and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Carolina State Museum of Natural History. [Raleigh, NC : North Carolina State Museum of Natural History]
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