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COSEWIC Assessment and Update Status Report on the Aurora Trout in Canada

Technical Summary

Salvelinus fontinalis timagamiensis

Aurora Trout
L’omble de Fontaine Aurora


Distribution

Extent of occurrence

<500 km2


Area of occupancy

<100 km2



Population Information

Total number of individuals in Canadian population

Unknown


Number of mature individuals in the Canadian population

500-1000


Generation time

3+yr


Population trend

Rapid decline and extinction from 2 original sites, reintroduced fish dependent on intervention for survival


Rate of population decline

Precipitous following acidification (acid rain)


Number of sub-populations

Originally 2, now 13, but natural reproduction occurs at only 2 sites


Is the population fragmented?

Yes


Number of individuals in each sub-population

Unknown


Number of extant locations

2


Number of historic sites from which species has been extirpated

4


Does the species undergo fluctuations?

No



Threats

Lake acidification by atmospheric deposition of pollutants, competition from introduced species such as yellow perch, and loss and degradation of spawning habitat.


Rescue Potential

Does species exist outside Canada?

No


Is immigration known or possible?

No