Bull trout (Salvelinus confluentus) COSEWIC assessment and status report 2012: chapter 16
Core Area | Estimated abundance | Occupancy (stream km) | Short-term trend | Threats | Conservation rank |
---|---|---|---|---|---|
DU2 [Genetic Lineage 2: Western Arctic populations] | |||||
Athabasca River Basin | |||||
Pembina River | 80 (50-250) | 200-1000 | Declining | Substantial, imminent threat | High Risk |
McLeod River | 1275(1000-2500) | 1000–5000 | Declining | Substantial, imminent threat | At Risk |
Athabasca River | 2500(1000-2500) | 1000–5000 | Declining | Localized, substantial threat | Potential Risk |
Berland River | 1000(250-1000) | 1000–5000 | Declining | Moderate, imminent threat | At Risk |
Peace-Smoky River Basin | |||||
Little Smoky River | 750 (250-1000) | 200–1,000 | Stable | Moderate, imminent threat | At Risk |
Upper Smoky River | 4500(2500-10000) | 1000–5000 | Stable | Moderate, imminent threat | At Risk |
Muskeg River | 625 (250-1000) | 200-1000 | Declining | Substantial, imminent threat | High Risk |
Jackpine River | 625 (250-1000) | 200-1000 | Stable | Widespread, low-severity threat | Potential Risk |
Sulphur River | 1000(250-1000) | 40-200 | Increasing | Slightly threatened | Potential Risk |
Middle Smoky River | 150 (50-250) | 200–1000 | Declining | Moderate, imminent threat | At Risk |
Wapiti River | 1100(1000-2500) | 200–1000 | Declining | Moderate, imminent threat | At Risk |
Peace River | 25 (1-50) | 40–200 | Declining | Substantial, imminent threat | High Risk |
Cutbank River | 175 (50-250) | 200–1000 | Rapidly declining | Moderate, imminent threat | High Risk |
Kakwa River | 7450 (2500-10000) | 200–1000 | Declining | Localized, substantial threat | Potential Risk |
Simonette River | 1925 (1000-2500) | 200–1000 | Declining | Moderate, imminent threat | At Risk |
DU4 [Genetic Lineage 2: Saskatchewan-Nelson populations] | |||||
Oldman River Basin | |||||
Belly River | 250 (250-1000) | 4–40 | Stable | Widespread, low-severity threat | At Risk |
St. Mary River | 550 (250-1000) | 40–200 | Stable | Substantial, imminent threat | High Risk |
Upper Crowsnest R. | 0 | – | – | – | Extirpated |
Castle River and Oldman Reservoir | 310 (250-1000) | 200–1000 | Stable | Moderate, imminent threat | At Risk |
Upper Oldman R. | 410 (250-1000) | 40–200 | Stable | Moderate, imminent threat | At Risk |
Upper Livingstone River | 280 (250-1000) | 4–40 | Stable | Moderate, imminent threat | High Risk |
Lower Oldman R. | 60 (50-250) | 40–200 | Declining | Substantial, imminent threat | High Risk |
Waterton River | 40 (1-50) | 4–40 | Declining | Localized, substantial threat | High Risk |
Drywood Creek | 40 (1-50) | 4–40 | Declining | Substantial, imminent threat | High Risk |
Willow Creek | 0 | -- | -- | -- | Extirpated |
Bow River Basin | |||||
Lower Bow River | 0 | -- | -- | -- | Extirpated |
Highwood River | 190 (50-250) | 40–200 | Declining | Substantial, imminent threat | High Risk |
Flat Creek | 40 (1-50) | 4–40 | Declining | Widespread, low-severity threat | High Risk |
Sheep River | 445 (250-1000) | 40–200 | Increasing | Moderate, imminent threat | At Risk |
Lower Elbow River | 105 (50-250) | 40–200 | Rapidly declining | Substantial, imminent threat | High Risk |
Canyon Creek | 20 (1-50) | 4–40 | Stable | Widespread, low-severity threat | At Risk |
Upper Elbow River | 115 (50-250) | 40–200 | Declining | Moderate, imminent threat | High Risk |
Jumpingpound Cr. | 15 (1-50) | 4–40 | Declining | Substantial, imminent threat | High Risk |
Ghost River | 385 (250-1000) | 40–200 | Declining | Moderate, imminent threat | High Risk |
Middle Bow River | 10 (1-50) | <4 | Declining | Substantial, imminent threat | High Risk |
Middle Kananaskis R. | Unknown | 4–40 | Severely declining | Substantial, imminent threat | High Risk |
Upper Kananaskis R. | 1200(1000-2500) | 40–200 | Increasing | Widespread, low-severity threat | Potential Risk |
Upper Spray River | 40 (1-50) | 4–40 | Declining | Moderate, imminent threat | High Risk |
Lake Minnewanka | 58 (50-250) | 4–40 | Declining | Slightly threatened | At Risk |
Upper Bow River* | Unknown | Unknown | Unknown | Unknown | Unranked |
Red Deer River Basin | |||||
Red Deer River | 530 (250-1000) | 200–1000 | Declining | Moderate, imminent threat | At Risk |
Little Red Deer River | 10 (1-50) | 4–40 | Declining | Substantial, imminent threat | High Risk |
North Saskatchewan River Basin | |||||
Brazeau River | 1275(1000-2500) | 200–1000 | Stable | Widespread, low-severity threat | Potential Risk |
Blackstone River | 720 (250-1000) | 200–1000 | Stable | Widespread, low-severity threat | Potential Risk |
Nordegg River | 105 (50-250) | 40–200 | Declining | Moderate, imminent threat | High Risk |
Baptiste River | 50 (1-50) | 40–200 | Declining | Moderate, imminent threat | High Risk |
Upper North Saskatchewan River | 950 (250-1000) | 40–200 | Increasing | Slightly threatened | Potential Risk |
Pinto Lake & Cline R. | 1150(1000-2500) | 40–200 | Stable | Slightly threatened | Potential Risk |
Middle North Saskatchewan River | 400 (250-1000) | 40–200 | Stable | Moderate, imminent threat | At Risk |
Lower North Saskatchewan River | 75 (50-250) | 40–200 | Stable | Moderate, non-imminent threat | At Risk |
Clearwater River | 390 (250-1000) | 40–200 | Declining | Moderate, imminent threat | High Risk |
Total | 33398 |
* Bull Trout occur within this core area; however, insufficient information was available to derive a conservation rank.
Core area | Estimated abundance | Occupancy (stream km) | Short-term trend | Threats | Conservation rank |
---|---|---|---|---|---|
DU1[Genetic Lineage 1: Southcoast BC populations] | |||||
EDU Lower Fraser | Unranked | ||||
Lillooet * | Unknown | 200-1000 | Stable | Substantial, mod.-severe, imminent threat | Unranked |
Lower Fraser | Unknown | 200-1000 | Declining | Widespread, low-severity threat | Unranked |
Lower Fraser Canyon | Unknown | Unknown | Unknown | Restricted, low-severity threat | Unranked |
EDU Puget Sound | Low Risk | ||||
Skagit * | 1000-2500 | 4-200 | Increasing | Restricted, low-severity threat | Low Risk |
EDU South Coastal | At Risk | ||||
Squamish * | 250-1000? | 40-200 | Declining | Substantial, mod.-severe, imminent threat | At Risk |
DU2 [Genetic Lineage 2: Western Arctic populations] | |||||
EDU Upper Peace | Potential Risk | ||||
Thutade * | 250-1000 | 40-200 | Increasing | Restricted, low-severity threat | Potential Risk |
Finlay Reach * | Unknown | 200-1000 | Stable | Unthreatened | Unranked |
Peace Reach * | Unknown | 200-1000 | Unknown | Restricted, mod.-severe threat | Unranked |
Parsnip Reach *(n=2) | Unknown | 1000-5000 | Unknown | Widespread, low-severity threat | Unranked |
Upper Parsnip | Unknown | 200-1000 | Unknown | Widespread, low-severity threat | Unranked |
Upper Finlay | Unknown | 200-1000 | Unknown | Unthreatened | Unranked |
Lower Finlay | Unknown | 200-1000 | Unknown | Widespread, low-severity threat | Unranked |
Omineca | Unknown | 200-1000 | Unknown | Unthreatened | Unranked |
Dinosaur Reservoir | Unknown | 4-40 | Unknown | Restricted, mod.-severe threat | Unranked |
EDU Lower Peace | At Risk | ||||
Halfway-Peace *(n=3) | 250-1000? | 200-1000? | Increasing? | Widespread, mod.-severe, imminent threat | At Risk |
Lower Murray * | 250-1000 | 200-1000? | Unknown | Substantial, mod.-severe, imminent threat | At Risk |
Moberly | 50-250? | 200-1000? | Unknown | Widespread, low-severity threat | At Risk |
Pine/Sukunka | Unknown | 200-1000? | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Upper Sukunka | 250-1000? | 200-1000? | Unknown | Restricted, low-severity threat | Unranked |
Upper Murray | Unknown | 200-1000? | Unknown | Restricted, low-severity threat | Unranked |
West Kiskatinaw | Unknown | 200-1000? | Unknown | Widespread, low-severity threat | Unranked |
Upper Wapiti | Unknown | 200-1000? | Unknown | Restricted, low-severity threat | Unranked |
Upper Narraway | Unknown | 200-1000? | Unknown | Restricted, low-severity threat | Unranked |
EDU Upper Liard | Unranked | ||||
Lower Dease | Unknown | Unknown | Unknown | Unknown | Unranked |
Upper Dease | Unknown | Unknown | Unknown | Unknown | Unranked |
Rancheria | Unknown | Unknown | Unknown | Unknown | Unranked |
Upper Liard | Unknown | Unknown | Unknown | Unknown | Unranked |
Upper Ketchika | Unknown | 200-1000? | Unknown | Unthreatened | Unranked |
Turnagain | Unknown | 200-1000? | Unknown | Unthreatened | Unranked |
Ketchika/Liard | Unknown | 200-1000? | Unknown | Unthreatened | Unranked |
EDU Lower Liard | Unranked | ||||
Lower Liard | Unknown | 200-1000? | Unknown | Unthreatened | Unranked |
Upper Toad | Unknown | 200-1000? | Unknown | Unthreatened | Unranked |
Muskwa | Unknown | 200-1000? | Unknown | Widespread, low-severity threat | Unranked |
Prophet | Unknown | 200-1000? | Unknown | Restricted, low-severity threat | Unranked |
Upper Fort Nelson | Unknown | 200-1000? | Unknown | Widespread, mod.-severe, imminent threat | Unranked |
DU3 [Genetic Lineage 2: Yukon populations] | |||||
EDU Lewes Distribution in question | Unranked | ||||
Atlin Lake | Unknown | Unknown | Unknown | Unknown | Unranked |
EDU Teslin | Unranked | ||||
Teslin | Unknown | Unknown | Unknown | Unthreatened | Unranked |
DU5 [Genetic Lineage 2: Pacific populations] | |||||
EDU Columbia-Arrow | Potential Risk | ||||
Pend d'Oreille * | 1-250 | 4-40 | Declining | Widespread-substantial, mod.-severe, imminent threat | High Risk |
Columbia River | 1-50 | 4-40 | Declining | Substantial, mod.-severe, imminent threat | High Risk |
ALR southern * (1 + 1 w/ALR-N) |
250-1000 | 4-40 | Stable | Widespread, low-severity threat | At Risk |
Whatshan | 50-250? | 4-40 | Stable | Widespread, low-severity threat | At Risk |
ALR northern * (1 + 1 w/ALR-S) |
1000-2500 | 40-200 | Stable | Restricted, low-severity threat | Low Risk |
EDU Lower Kootenay | Potential Risk | ||||
Slocan | 250-1000 | 40-200 | Declining | Substantial, mod.-severe, imminent threat | At Risk |
Kootenay Lake *(n=5) | 2500-10000 | 200-1000 | Stable | Widespread, low-severity threat | Potential Risk |
EDU Upper Kootenay | Low Risk | ||||
Upper Kootenay R *(n=2) | 1000-2500 | 200-1000 | Increasing | Restricted, low-severity threat | Low Risk |
Koocanusa * | 1000-10000 | 200-1000 | Increasing | Restricted, low-severity threat | Low Risk |
Elk * | Unknown | 40-200 | Increasing | Restricted, low-severity threat | Unranked |
Bull | Unknown | 40-200 | Unknown | Restricted, low-severity threat | Unranked |
EDU Upper Skeena | At Risk | ||||
Morice | 250-1000 | 40-200 | Unknown | Substantial, mod.-severe, imminent threat | At Risk |
Upper Sustut * | Unknown | Unknown | Unknown | Restricted, low-severity threat | Unranked |
Mid-Skeena * | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Lower Sustut/Skeena * | Unknown | Unknown | Unknown | Restricted, low-severity threat | Unranked |
Upper Skeena | Unknown | Unknown | Unknown | Unknown | Unranked |
Lower Babine/Skeena | Unknown | Unknown | Unknown | Unthreatened | Unranked |
Upper Babine | Unknown | Unknown | Declining? | Restricted, mod.-severe threat | Unranked |
Babine Lake | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
Kispiox | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Bulkley | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Zymoetz | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Kitsumkalum | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
EDU Upper Fraser | Potential Risk | ||||
Upper Fraser * | 1000-2500 | 200-1000 | Stable? | Widespread, low-severity threat | Potential Risk |
Robson | Unknown | Unknown | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
McGregor | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
Bowron | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
EDU Middle Fraser | Potential Risk | ||||
Chilko * | 250-1000 | 40-200 | Stable | Widespread, low-severity threat | At Risk |
Upper Bridge | 250-1000 | 40-200 | Unknown | Substantial, mod.-severe, non-imminent threat | At Risk |
Seton/Anderson/Lower Bridge | 250-1000 | 200-1000 | Unknown | Substantial, mod.-severe, non-imminent threat | Potential Risk |
Fraser Canyon | Unknown | 40-200 | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Quesnel Lake | Unknown | 40-200 | Stable | Restricted, low-severity threat | Unranked |
Cariboo | Unknown | 200-1000 | Unknown | Restricted, low-severity threat | Unranked |
Cottonwood | Unknown | 200-1000 | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
West Road | Unknown | 200-1000 | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Churn | Unknown | 40-200 | Unknown | Widespread, low-severity threat | Unranked |
Upper Big Creek | Unknown | 40-200 | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Little Chilcotin | Unknown | 40-200 | Unknown | Substantial, mod.-severe, imminent threat | Unranked |
Taseko | Unknown | 200-1000 | Unknown | Widespread, low-severity threat | Unranked |
Prince George | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
Upper Stuart | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
Francois | Unknown | Unknown | Unknown | Unknown | Unranked |
Nechako Reservoir | Unknown | Unknown | Unknown | Unknown | Unranked |
EDU Homathko-Klinaklini | Potential Risk | ||||
Lower Klinaklini | Unknown | Unknown | Unknown | Restricted, mod.-severe threat | Unranked |
Upper Klinaklini | 1000-2500? | 200-1000 | Stable | Restricted, low-severity threat | Unranked |
Lower Homathko | 250-1000? | 40-1000 | Stable | Unthreatened | Potential Risk |
Upper Homathko | 1000-2500? | 200-1000 | Stable | Restricted, low-severity threat | Unranked |
EDU Bella Coola-Dean Distribution in question | Unranked | ||||
Upper Dean | Unknown | 40-200 | Unknown | Widespread, low-severity threat | Unranked |
Upper Atnarko | Unknown | 4-40 | Unknown | Unknown | Unranked |
EDU Thompson | Potential Risk | ||||
Upper Shuswap * | 250-1000 | 40-200 | Increasing | Widespread, low-severity threat | Potential Risk |
Middle Shuswap | 1-50 | 4-40 | Very rapidly declining | Widespread, mod.-severe, imminent threat | High Risk |
Adams Lake | 250-1000 | 40-200 | Unknown | Widespread, low-severity threat | Potential Risk |
Shuswap Lake | 1000-2500 | 200-1000 | Unknown | Widespread, low-severity threat | Potential Risk |
Mabel Lake | 250-1000 | 200-1000 | Unknown | Substantial, mod.-severe, non-imminent threat | Potential Risk |
Nicola | 1-250 | 4-40 | Very rapidly declining | Widespread, mod.-severe, imminent threat | High Risk |
North Thompson | 1000-2500 | 200-1000 | Unknown | Widespread, low-severity threat | Potential Risk |
EDU Upper Columbia | Potential Risk | ||||
Revelstoke Reservoir | 250-2500 | 200-1000 | Stable/ Increasing |
Widespread, low-severity threat | Potential Risk |
Kinbasket Reservoir | 1000-10000 | 200-1000 | Stable/ Increasing |
Widespread, low-severity threat | Potential Risk |
Upper Columbia | 250-2500 | 200-1000 | Unknown | Widespread, low-severity threat | Potential Risk |
Spillimacheen | Unknown | 4-40 | Unknown | Restricted, mod.-severe threat | Unranked |
EDU Flathead | At Risk | ||||
Upper Flathead | 250-1000 | 40-1000 | Declining | Substantial, mod.-severe, imminent threat | At Risk |
EDU Lower Skeena | Unranked | ||||
Lower Skeena | Unknown | Unknown | Unknown | Restricted, low-severity threat | Unranked |
EDU Upper Nass | Unranked | ||||
Upper Naas | Unknown | Unknown | Unknown | Unknown | Unranked |
Middle Naas | Unknown | Unknown | Unknown | Unknown | Unranked |
Meziadin | Unknown | Unknown | Unknown | Unknown | Unranked |
Cranberry-Kiteen | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
Bell-Irving | Unknown | Unknown | Unknown | Widespread, low-severity threat | Unranked |
EDU Iskut-Lower Stikine | Unknown | Unranked | |||
Tuya | Unknown | Unknown | Unknown | Unknown | Unranked |
Tahitan | Unknown | Unknown | Unknown | Unknown | Unranked |
Middle Iskut | Unknown | Unknown | Unknown | Unknown | Unranked |
EDU Upper Stikine | Unknown | Unranked | |||
Upper Stikine | Unknown | Unknown | Unknown | Unknown | Unranked |
Spatsizi | Unknown | Unknown | Unknown | Unknown | Unranked |
Klappan | Unknown | Unknown | Unknown | Unknown | Unranked |
Tanzilla | Unknown | Unknown | Unknown | Unknown | Unranked |
EDU Nakina | Unknown | Unranked | |||
Nakina | Unknown | Unknown | Unknown | Unknown | Unranked |
EDU Taku | Unknown | Unranked | |||
Inklin | Unknown | Unknown | Unknown | Unknown | Unranked |
Sheslay | Unknown | Unknown | Unknown | Unknown | Unranked |
Nahlin | Unknown | Unknown | Unknown | Unknown | Unranked |
* Indicates one of 31 available adult Bull Trout abundance datasets (number in parenthesis when more than one dataset for a core area).
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