. The Canadian field-naturalist. Natural history. 148 The Canadian Field-Naturalist Vol. 115. Figure 4. Distribution of the Bluntnose Minnow, Pimephales notatus, in Manitoba (after sources cited in the text). numbers in the Winnipeg River above the Point du Bois Dam (50°18'N, 95°30'W) and vicinity, and Echo Lake, Whiteshell Provincial Park [ROM (Royal Ontario Museum) Number 14896]; as well as St. Andrew's Locks on the Red River (ROM 14896). Stewart (K. W. Stewart, Department of Zoology, University of Manitoba, Winnipeg, Manitoba; personal communication 1997) has examined the Red River specimen
. The Canadian field-naturalist. Natural history. 148 The Canadian Field-Naturalist Vol. 115. Figure 4. Distribution of the Bluntnose Minnow, Pimephales notatus, in Manitoba (after sources cited in the text). numbers in the Winnipeg River above the Point du Bois Dam (50°18'N, 95°30'W) and vicinity, and Echo Lake, Whiteshell Provincial Park [ROM (Royal Ontario Museum) Number 14896]; as well as St. Andrew's Locks on the Red River (ROM 14896). Stewart (K. W. Stewart, Department of Zoology, University of Manitoba, Winnipeg, Manitoba; personal communication 1997) has examined the Red River specimens and confirms their validity. He feels that these were either waifs washed down the Winnipeg River, or more likely, released bait brought in from farther south. Apart from this anomalous collection Stewart (personal communication) indicated that there has been no downstream movement of Pimephales notatus in the Winnipeg River. Scott and Crossman (1973) reported that the species was rare in Manitoba. Stewart (personal communication) believes that the species is of concern in Manitoba only because of its extremely restricted range. Although not abun- dant in the Winnipeg River above the Point du Bois Dam it can be collected there with some pre- dictability. Habitat The Bluntnose Minnow is a resilient species occur- ring in almost all types of waters within its natural range except the deeper waters of lakes and rivers (Trautman 1957). It prefers hard-bottomed, sandy or gravelly shallows of pools in creeks and small rivers, but may be found elsewhere, except (and as previ- ously noted) in swamps, heavily weeded areas and heavily silted ditches and ponds (Scott and Crossman 1973; Smith 1979). The Bluntnose Minnow appears to be able to survive in areas where there is high competition from a number of other species and can inhabit waters with gradients of 0 to 15 m/km, although its abundance is limited where the gradient is more than 9 m/km or where there is intense com- petition,
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