. The Canadian field-naturalist. 1991 Peden: Status of the Leopard Dace 183 o 2 a Fig u 20 ? f^-#fhFi. 160 140 INDEX rf 4. Character index representing Rhinichthys falcatus (individuals sorting out between 123 and 133) and R. umatilla (between 148 and 160) from the reservoir between South Slocan and Brilliant dams. Stippled bars are sympatric individuals of both species, solid bars are apparent intermediate individuals. The open bars are allopatric R. falcatus from lower Arrow Lake. The individual sorting out at 133 appears to bean atypical R. falcatus from the mouth of the Slocan River (indic
. The Canadian field-naturalist. 1991 Peden: Status of the Leopard Dace 183 o 2 a Fig u 20 ? f^-#fhFi. 160 140 INDEX rf 4. Character index representing Rhinichthys falcatus (individuals sorting out between 123 and 133) and R. umatilla (between 148 and 160) from the reservoir between South Slocan and Brilliant dams. Stippled bars are sympatric individuals of both species, solid bars are apparent intermediate individuals. The open bars are allopatric R. falcatus from lower Arrow Lake. The individual sorting out at 133 appears to bean atypical R. falcatus from the mouth of the Slocan River (indicated by coarse stippling). Data taken from Peden and Hughes (1988) where the character index is described in detail. distributed. August temperatures of the Columbia River near Castlegar (below Arrow Lakes) average near ° C; however, lake temperature upstream from here may differ. Such temperatures below the outlet of Lower Arrow Lake suggest this area is cooler than other habitats that the species occupies. Pend d'Oreille River: Rhinichthys falcatus is reported from the Pend d'Oreille River (Carl et al. 1959); however, this river is completely altered near the international border by large dams (Peden and Clermont 1989). We observed old samples labeled as R. falcatus, but they were too small to determine if they were R. umatilla or R. falcatus. We also captured a larger specimen in the reservoir below the mouth of the Salmon River which may have been R. umatilla (identified on basis of number of scale pockets on this otherwise damaged specimen). The survival of these fish in the Canadian portion of the Pend d'Oreille River is uncertain. Future work is needed to verify if R. falcatus or R. umatilla are still present (and if so, where?). Fraser River System: Although the only Fraser River populations that we have sampled are those from the area between Chilliwack and Hope, British Columbia, we have also had reports of R. falcatus from other areas of the Fraser Drainage wher
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