I can answer that. It's a good question.
COSEWIC assessments and the SARA listings refer to what is known as wildlife species, which is not the same as the taxonomic species that you're referring to. The assessment and the listing would apply only to populations in the Chilcotin and Thompson rivers. It would not apply to Oncorhynchus mykiss in myriad lakes throughout British Columbia.
The Species at Risk Act allows us to assess things on a population-base level. I think that problem will go away, because people will be happy to accept fishing restrictions in this relatively small area of the range of the species, the taxonomic species.