Stinkpot (Sternotherus odoratus) COSEWIC assessment and status report: chapter 11
Technical Summary
Sternotherus odoratus
Stinkpot – Tortue musquée
Range of Occurrence in Canada:
Ontario and Quebec
Extent and Area information
extent of occurrence (EO)(km²):
93600 km²
specify trend (decline, stable, increasing, unknown):
decline
are there extreme fluctuations in EO (> 1 order of magnitude)?
no
area of occupancy (AO) (km²):
Not Calculated
specify trend (decline, stable, increasing, unknown):
decline
are there extreme fluctuations in AO (> 1 order magnitude)?
No
number of extant locations:
unknown
specify trend in # locations (decline, stable, increasing, unknown):
Decline
(43% of districts)
are there extreme fluctuations in # locations (>1 order of magnitude)?
No
habitat trend: specify declining, stable, increasing or unknown trend in area, extent or quality of habitat:
Declining
Population information
generation time (average age of parents in the population) (indicate years, months, days, etc.):
15+ years
number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values):
Unknown
total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals:
Unknown
total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals:
probably declining
total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals:
if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period):
30-40% over last 18 years (based on lack of observations in 12 districts since 1984)
are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?
No
is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., < 1 successful migrant / year)?
Yes
list each population and the number of mature individuals in each:
Unknown
specify trend in number of populations (decline, stable, increasing, unknown):
Unknown
are there extreme fluctuations in number of populations (>1 order of magnitude)?
No
Threats (actual or imminent threats to populations or habitats) [add rows as needed]
- habitat alteration through drainage of wetlands, recreational activity and development,
- shoreline development reduces limited sites for nesting, especially in Canadian Shield where nest sites are likely most restrictive
- habitat pollution
- death by boat propeller or by being caught on fish hooks
Rescue Effect (immigration from an outside source)
does species exist elsewhere (in Canada or outside)?
yes in US
status of the outside population(s)?
stable
is immigration known or possible?
no
would immigrants be adapted to survive here?
possibly, see report
is there sufficient habitat for immigrants here?
unknown
Quantitative Analysis
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