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Inconnu (Coney) - Upper Mackenzie R. and Great Sla

Stenodus leucichthys

General Status Rank:

Sensitive

ELCODE:

AFCHA06010

Common Name:

Inconnu (Coney) - Upper Mackenzie R. and Great Sla

Scientific Name:

Stenodus leucichthys

Naming References:

Google image search

Taxonomy

Group:

Fish

Kingdom:

Animalia

Phylum:

Chordata

Class:

Actinopterygii

Order:

Salmoniformes

Family:

Salmonidae

References:

General Biology

Female Age at Maturity

7 - 10 years

References:

Longevity

11+ years

References:

Economic/Human Considerations

Very important commercial species used for smoked fish with minor importance as a subsistence species and source of dog food

References:

Habitat

adults = inland lakes spawning = in freshwater streams young = may remain in stream for 2 years before descending into lake or ocean(B011, B059). Env: demersal; anadromous; freshwater; brackish; marine ; depth range-10 m Clim: boreal; 73°N-58°N(W017). Nerito-pelagic, shallows (R131), Inconnu exhibit anadromous,adfluvial, and possibly riverine life history types in the NT (Richardson et al. 2001; Evans et al. 2002).(B172)

References:

Distribution

Ecozones

Southern Arctic, Taiga Cordillera, Taiga Plains, Taiga Shield, Boreal Cordillera, Boreal Plains, Beaufort Sea Amundsen Gulf

References:

Distribution

0.48 (Upper Mackenzie is any waters of the Mackenzie Basin above the Ramparts)Adfluvial Inconnu from Great Slave Lake enter the Slave River in mid-August and spawn in early to mid-October (Richardson et al. 2001; Evans et al. 2002). After spawning they move back to Great Slave Lake where they remain until the following summer. Spawning also occurs in the Buffalo, Hay, Little Buffalo, and Talston rivers. The eggs hatch in spring and it is believed the young reside in the rivers for a minimum of two years (Evans et al. 2002). From there they migrate to Great Slave Lake where they likely inhabit deep, offshore areas (Richardson et al. 2001).(B172)

Score:

G

References:

Marine Distribution Description:

non anadromous

Number of Occurrences

less than 5; Upper Mackenzie and Great Slave Lake (Upper Mackenzie is any waters of the Mackenzie Basin above the Ramparts) Adfluvial Inconnu from Great Slave Lake spawn in the Slave River, spawning also occurs in the Buffalo, Hay, Little Buffalo, and Talston rivers. (B172)

Score:

A

References:

Area of Occupancy

Rapidely declining; Of the 5 Great Slave Lake stocks that were once abundant, only 2 remain, Slave and Buffalo River Stocks

Score:

-

References:

Population

Population Size

More than 10 000(H133); Resilience: Low, minimum population doubling time 4.5 - 14 years (K=0.05-0.10; tm=9-12; tmax=22; Fec=80,000) (W017).150cm (W017)

Score:

F

References:

Trends

Trends

Rapidely declining, Of the 5 Great Slave Lake stocks that were once abundant, only 2 remain, Slave and Buffalo River Stocks; increasing population is Yellwoknife Bay

Score:

FH

References:

Threats

Threats

Of the 5 Great Slave Lake stocks that were once abundant, only 2 remain, Slave and Buffalo River Stocks, with the Buffalo River stock being seriously depleted by the commercial overfishing and at risk but protected by closure since 1992 and showing some very early signs of recovery

Score:

A

References:

Intrinsic Vulnerability

global warming

Score:

-

References:

General Status Rank

Rank:

Sensitive

Status Rank Description:

(Upper Mackenzie is any waters of the Mackenzie Basin above -south of - the Ramparts)

S Rank:

S2S3

Decision Process Description:

Drafted by the Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens with review by S. Carriere Reviewed by Dr. Reist, DFO; Reviewed by DFO in 2010,no change; ; Modified from May be at Risk to sensitive due to better population numbers in GSL (H126); Reviewed by DFO in 2015, no change

Last Updated:

July 22, 2015

References

Age Of Maturity

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return

Area of Occupancy

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return

Economic Status

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return

Ecozones

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return
Coad B.W. and Reist J.D. (2004) Annotated List of the Arctic Marine Fishes of Canada.. DFO, Canadian Manuscript Report of Fisheries and Aquatic Sciences 2674 - R131 Return

Habitat

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return
Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return
Coad B.W. and Reist J.D. (2004) Annotated List of the Arctic Marine Fishes of Canada.. DFO, Canadian Manuscript Report of Fisheries and Aquatic Sciences 2674 - R131 Return
FishBase (2004) Fish Base, accessed Nov 5, 2004. Froese, R. and D. Pauly. Editors. 2004 www.fishbase.org, version (09/2004) - W017 Return
Sawatzky, C.D., Michalak, D. Reist, J.D. Carmichael, T.J., Mandrak, N.E., Heuring, L.G. (2007) Distributions of freshwater and anadromous fishes from the mainland Northwest Territories, Canada.. Canadian Manuscript Report of Fisheries and Aquatic Sciences 2793 - B172 Return

Intrinsic Vulnerability

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return

Longevity

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return

Naming

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return

Number of Occurrences

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return
Sawatzky, C.D., Michalak, D. Reist, J.D. Carmichael, T.J., Mandrak, N.E., Heuring, L.G. (2007) Distributions of freshwater and anadromous fishes from the mainland Northwest Territories, Canada.. Canadian Manuscript Report of Fisheries and Aquatic Sciences 2793 - B172 Return
Hantelle Sawatzky and Jim Reist (2008) Inconnu NWT General Status rank:where is the Lower Mackenzie. E-mail to S Carriere - 21/10/08 copy in binder - H215 Return

Population Size

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return

,

FishBase (2004) Fish Base, accessed Nov 5, 2004. Froese, R. and D. Pauly. Editors. 2004 www.fishbase.org, version (09/2004) - W017 Return

Range Extent

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return
Sawatzky, C.D., Michalak, D. Reist, J.D. Carmichael, T.J., Mandrak, N.E., Heuring, L.G. (2007) Distributions of freshwater and anadromous fishes from the mainland Northwest Territories, Canada.. Canadian Manuscript Report of Fisheries and Aquatic Sciences 2793 - B172 Return
Hantelle Sawatzky and Jim Reist (2008) Inconnu NWT General Status rank:where is the Lower Mackenzie. E-mail to S Carriere - 21/10/08 copy in binder - H215 Return

Short Term Trends

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return

Taxonomy

Scott WB and Crossman EJ (1979) Freshwater Fishes of Canada. Bryant Press Ltd RWED Library Call #QL626.S3 - B011 Return
McPhail JD, and Lindsey CC (1970) Freshwater Fishes of Northwestern Canada and Alaska. Queen's Printer for Canada Fisheries Research Board of Canada Bulletin No. 173 RWED Library Call QL 626.M3 - B059 Return
Fish Base (1999) FishBase 99. http://www.cgiar.org/iclarm/fishbase/ - W012 Return

Threats

Arctic Stock Assessment DFO Committee - Freshwater Fishes - Chris Day, Dr. Ross Tallman, Dr. Sue Cosens (2000) Pers. communication. Arctic Stock Assessment Section, DFO Science Directorate, Freshwater Institute, 501 University Cres., R3T 2N6 , 204 983 5158 - H133 Return