. The Canadian field-naturalist. 1972 Nelson and Paetz: Fishes of Wood Buffalo National Park 139 Fathead minnow are at their northern distribu- tional Hmits in Wood Buffalo National Park. Despite this fact they are common or abundant at all sites except Little Buffalo River. Allen (1956) collected them from ponds in the Power Sass. Interestingly, they are not known to occur for about 300 miles (483 km) farther south in Alberta. LoNGNOSE DACE — Rliinicluhys cataractae. Map numbers — 17 and 18. Within the area of study, longnose dace are com- mon only in the Peace River. We have taken them in th
. The Canadian field-naturalist. 1972 Nelson and Paetz: Fishes of Wood Buffalo National Park 139 Fathead minnow are at their northern distribu- tional Hmits in Wood Buffalo National Park. Despite this fact they are common or abundant at all sites except Little Buffalo River. Allen (1956) collected them from ponds in the Power Sass. Interestingly, they are not known to occur for about 300 miles (483 km) farther south in Alberta. LoNGNOSE DACE — Rliinicluhys cataractae. Map numbers — 17 and 18. Within the area of study, longnose dace are com- mon only in the Peace River. We have taken them in the Buffalo River (60°42'; 114°55'), 116 miles (186 km) northwest of Fort Smith. Pearl dace — Semotilus margarita. Map numbers 1,2,3, and 5. Pearl dace are common at the same sites as fine- scale dace and lake chub. Only one specimen was col- lected in Klewi River. Allen (1956) notes the species in ponds in the I'ower Sass and the most northerly occurrence for this species is reported to be the lower Sass River (McPhail and Lindsey, 1970). Catostomidae Longnose sucker — Catostomus catostomus. Map numbers — 2,3,7,8,11,16,17, and 18. Longnose suckers are common in many of the above areas, particularly so at the mouth of the Hornaday. Like the northern pike, it is very wide- spread in northern North America. White sucker — Catostomus commersoni. Map numbers — 3,5,10, and 17. White suckers were common only in Preble Creek and Little Buffalo River (where the longnose sucker was rare or not taken). Elsewhere, only a few individuals were taken and these were usually adults. Gadidae Burbot — Lota lota. Map numbers — 15, 16, and 17. The circumpotar burbot are present in the lower reaches of several Slave River tributaries. They are present in Little Buffalo River but apparently absent. '^i f. s,-^S Figure 7. Fort Campbell Falls on the Little Buffalo River at the escarpment north of the highway west of Smith, cut into Devonian gypsum and carbonate Please note th
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