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Wolverine (Gulo gulo)

Technical Summary - Western Population

Gulo gulo

Wolverine - Western Population

Carcajou

Yukon Territory, Northwest Territories, Nunavut Territory, British Columbia, Alberta, Saskatchewan, Manitoba, and Ontario.


Extent and Area Information

Extent of occurrence (EO) (km2)6.1 million km2
specify trend (decline, stable, increasing, unknown)Stable overall, locally decreasing
are there extreme fluctuations in EO (> 1 order of magnitude)?No
Area of occupancy (AO) (km2)Estimated at 5.5 million km2
specify trend (decline, stable, increasing, unknown)Stable
are there extreme fluctuations in AO (> 1 order magnitude)?No
number of extant locations1
specify trend in # locations (decline, stable, increasing, unknown)Stable
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 habitatStable in area, locally declining quality


Population Information

generation time (average age of parents in the population) (indicate years, months, days, etc.)4 years
number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)15 000 to 19 000
total population trend: specify declining, stable, increasing or unknown trend in number of mature individualsStable
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)?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)?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)

- harvest
- Declining caribou and other ungulate populations (causes: overhunting, habitat losses listed below)
- habitat losses due to forestry, agriculture, urbanization, oil and gas development, hydroelectric reservoirs
- habitat fragmentation due to linear developments
- disturbance caused by recreational activities such as snowmobiling and skiing


Rescue Effect (immigration from an outside source): High

does species exist elsewhere (in Canada or outside)?Yes; United States (Alaska and coterminous states), Eurasia
status of the outside population(s)?Special concern, threatened, endangered
is immigration known or possible?Yes
would immigrants be adapted to survive here?Yes
is there sufficient habitat for immigrants here?Yes


Quantitative Analysis

n/a
 

 

Technical Summary - Eastern Population

Gulo gulo

Wolverine - Eastern Population

Carcajou

Quebec and Labrador


Extent and Area Information

Extent of occurrence (EO) (km2)Unknown, Formerly 1.2 million km2
specify trend (decline, stable, increasing, unknown)Decline
are there extreme fluctuations in EO (> 1 order of magnitude)?No
Area of occupancy (AO) (km2)Unknown; formerly 500 000 km2
specify trend (decline, stable, increasing, unknown)Decline
are there extreme fluctuations in AO (> 1 order magnitude)?No
number of extant locationspossibly 1
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 habitatDeclining


Population Information

generation time (average age of parents in the population) (indicate years, months, days, etc.)4 years
number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)very few, possible none
total population trend: specify declining, stable, increasing or unknown trend in number of mature individualsDeclining
if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)Unknown
are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?Unknown
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)?Unknown
list each population and the number of mature individuals in eachUnknown
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)

- forestry, hydroelectric developments
- unstable or declining caribou populations


Rescue Effect (immigration from an outside source): Low

does species exist elsewhere (in Canada or outside)?Yes; Western Canada, United
States, Eurasia
status of the outside population(s)?Special concern, threatened, endangered
is immigration known or possible?Yes
would immigrants be adapted to survive here?Yes
is there sufficient habitat for immigrants here?Yes


Quantitative Analysis

n/a