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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