Aurora trout COSEWIC assessment and status report: chapter 14
Technical Summary
Salvelinus fontinalis timagamiensis
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
Page details
- Date modified: