Keen's long-eared bat (Myotis keenii) COSEWIC assessment and status report: chapter 12

Technical Summary

Myotis keenii

Keen’s long-eared bat – Chauve-souris de Keen

Range of Occurrence in Canada:

British Columbia

Extent and Area information

extent of occurrence (EO)(km²)

268,830

specify trend (decline, stable, increasing, unknown)

Stable

are there extreme fluctuations in EO (> 1 order of magnitude)?

No

area of occupancy (AO) (km²)

Unknown

specify trend (decline, stable, increasing, unknown)

-

are there extreme fluctuations in AO (> 1 order magnitude)?

number of extant locations

specify trend in # locations (decline, stable, increasing, unknown)

Unknown

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 if forest dependent

Population information

generation time (average age of parents in the population) (indicate years, months, days, etc.)

2 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

if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)

-

are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?

-

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)?

No

list each population and the number of mature individuals in each

-

specify trend in number of populations (decline, stable, increasing, unknown)

-

are there extreme fluctuations in number of populations (>1 order of magnitude)?

-

Threats (actual or imminent threats to populations or habitats)

  • disturbance of hibernacula in caves by forest harvesting activity and recreational caving
  • removal of tree roosts from forest harvesting
  • disturbance of maternity colonies

Rescue Effect (immigration from an outside source)

Low

does species exist elsewhere (in Canada or outside)?

Yes

status of the outside population(s)?

SH

is immigration known or possible?

Yes

would immigrants be adapted to survive here?

Yes

is there sufficient habitat for immigrants here?

Yes

Quantitative Analysis

Insufficient data

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