NWT 2011-2015 - NWT Species at Risk

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6.4 Fishes Common Name Scientific Species Name Status Rank Range/ Habitat Note a Chum Salmon Oncorhynchus keta Undetermined A Coho Salmon Oncorhynchus kisutch Vagrant X/A Rainbow Trout Oncorhynchus mykiss Alien X, F Sockeye Salmon/ Kokanee Oncorhynchus nerka Vagrant X/F,A Chinook Salmon Oncorhynchus tshawytscha Vagrant X/A Pygmy Whitefish Prosopium coulterii Undetermined F Round Whitefish Prosopium cylindraceum Secure F,A Reason for Change b Mountain Whitefish Prosopium williamsoni Secure F,A ∃ 6 Arctic Char h Salvelinus alpinus Secure F,A Brook Trout Salvelinus fontinalis i Alien F ∃ 6 Bull Trout Salvelinus confluentus May Be At Risk F COSEWIC Status/ Global Conservation Concern c Dolly Varden Salvelinus malma Sensitive L/F,A Special Concern - 2010 Lake Trout Salvelinus namaycush Secure F Inconnu (Coney) f Stenodus leucichthys Sensitive F,A Arctic Grayling Thymallus arcticus Sensitive F Scorpaeniformes – Agonidae Atlantic Poacher Leptagonus decagonus Not assessed M Veteran Poacher Podothecus veternus Presence Expected M Arctic Alligatorfish Ulcina olrikii Not assessed M Scorpaeniformes – Cottidae Spinyhook Sculpin Artediellus gomojunovi Presence Expected M Hamecon Artediellus scaber Not assessed M Arctic Hookear Sculpin Artediellus uncinatus Not assessed M Slimy Sculpin Cottus cognatus Secure F 5 Sculpin-like fishes – Alligatorfishes and poachers Sculpin-like fishes – Scaleless sculpins Spoonhead Sculpin Cottus ricei Secure F 5 Not at Risk - 1989 Antlered Sculpin Enophrys diceraus Presence Expected M Arctic Staghorn Sculpin Gymnocanthus tricuspis Not assessed M Twohorn Sculpin Icelus bicornis Not assessed M Spatulate Sculpin Icelus spatula Not assessed M Belligerent Sculpin Megalocottus platycephalus Presence Expected M Plain Sculpin Myoxocephalus jaok Presence Expected M Fourhorn Sculpin g Myoxocephalus quadricornis Undetermined F, M Arctic Sculpin Myoxocephalus scorpioides Not assessed M Shorthorn Sculpin Myoxocephalus scorpius Not assessed M Deepwater Sculpin Myoxocephalus thompsonii Sensitive F Bigeye Sculpin Triglops nybelini Not assessed M Ribbed Sculpin Triglops pingelii Not assessed M Landlocked freshwater form: Data Deficient - 2003; Marine form: Not at Risk - 2003 42 NWT Species 2011-2015
Common Name Scientific Species Name Status Rank Scorpaeniformes – Cyclopteridae Range/ Habitat Note a Pimpled Lumpsucker Eumicrotremus andriashevi Presence Expected M Leathernfin Lumpsucker Eumicrotremus derjugini Not assessed M Atlantic Spiny Lumpsucker Eumicrotremus spinosus Not assessed M Scorpaeniformes – Hexagrammidae Whitespotted Greenling Hexagrammos stelleri Presence Expected M Scorpaeniformes – Liparidae Sea Tadpole Careproctus reinhardti Not assessed M Gelatinous Seasnail Liparis fabricii Not assessed M Variegate Snailfish Liparis gibbus Not assessed M Kelp Snailfish Liparis tunicatus Not assessed M Scorpaeniformes – Psychrolutidae Sadko Sculpin Cottunculus sadko Presence Expected M Squaliformes – Dalatiidae Pacific Sleeper Shark Somniosus pacificus Presence Expected M Reason for Change b COSEWIC Status/ Global Conservation Concern c Sculpin-like fishes – Lumpsuckers Sculpin-like fishes – Greenlings Sculpin-like fishes – Snailfishes Sculpin-like fishes – Flathead sculpins Dogfish sharks – Sleeper sharks a Range Note: L = Species with limited distribution (less than 5% of NWT), hence small numbers are expected. X = Usual range of species not in NWT. Habitat Note: F = Species (form) lives exclusively in freshwater. A = Species (form) lives in both marine and freshwater. M = Species (form) lives in marine water exclusively. b Describes reasons for a change in status rank between 2006 and 2011. : Increasing Risk, : Decreasing Risk, ∃: Error correction, #: Species new to the NWT, T: Taxonomic change, : Information added, Π: New rank category, A: Changed due to detailed assessment by COSEWIC since 2006. See Data Sources and Methods for more details. c For your convenience, the status derived from other processes than the one presented in this report is described in this column. COSEWIC Status: Status for a species in Canada if it has already been assessed in a detailed manner by COSEWIC as of 2010. The year of each assessment is given with each status. After 2010, please consult current and additional status assessments on the COSEWIC web page (www.cosewic.gc.ca). Global Conservation Concern: Rank of a species in the world as assessed by NatureServe. GH: Possibly Extinct, G1: Critically Imperilled, G2: Imperilled, G3: Vulnerable. Q: Taxonomy complex and unresolved. Definitions and more information can be found at www.natureserve.org. d The taxon American Brook Lamprey (Lampetra appendix) in the NWT(and Alaska) is considered a species of global concern (G3Q) under the name Alaska Brook Lamprey (Lampetra alaskensis). The taxonomy of this taxon is under review. e General Status Ranks are given for both Lake and Humpback Whitefish as taxonomically distinct species: Coregonus clupeaformis, C. pidschian. However, these species cannot easily be distinguished using standard morphometric methods. The relative distribution of each species in the NWT is still unclear. f General Status Rank is given for the whole species Inconnu (Stenodus leucichthys), but one stock, in the Upper Mackenzie River and Great Slave Lake system is given a Rank of “May Be At Risk”. g Fourhorn Sculpin (Myoxocephalus quadricornis) is a marine species, but a lake form exists in some Arctic islands of NWT (and Nunavut). The Rank is given for the whole species. h General Status is given for the whole species Arctic Char (Salvelinus alpinus), but two stocks, in the Hornaday River and the Kuujjua River, were given a Rank of “Sensitive”. i Brook Trout (Salvelinus fontinalus) was stocked in 3 locations in the NWT prior to the 1970s. It is uncertain if they have formed surviving populations. 1 Changed from At Risk 2 Changed from May Be At Risk 3 Changed from Sensitive 4 Changed from Secure 5 Changed from Undetermined 6 Changed from Not Assessed 7 Changed from Alien 8 Changed from Extirpated 9 Changed from Vagrant 10 Changed from Presence Expected General Status Ranks of Wild Species in the Northwest Territories 43
Page 1 and 2: NWT NWT Species 2011-2015 | General
Page 3 and 4: NWT SPECIES 2011-2015 General Statu
Page 5 and 6: Executive Summary..................
Page 7 and 8: Preface - Building on our knowledge
Page 9 and 10: 2. Goals - What are we trying to ac
Page 11 and 12: Species Scope Which species are ran
Page 13 and 14: 191 ABNKD06075 Bird Falconiformes F
Page 15 and 16: Guideline Matrix For Scoring Indica
Page 17 and 18: Changing Ranks Keeping Track of Cha
Page 19 and 20: Summary of 2011 General Status Rank
Page 21 and 22: About Changes in Ranks between 2006
Page 23 and 24: 6. Ranked Species Lists - What are
Page 25 and 26: On the Land “Going out on the lan
Page 27 and 28: Common Name Scientific Species Name
Page 31 and 32: List 2. Marine Mammals Four species
Page 33 and 34: Snow Bunting Photo Credit: J Nagy G
Page 45 and 46: studies of genetics, fluctuations i
Page 47: Common Name Scientific Species Name
Page 51 and 52: List 5. Freshwater Mussels There ar
Page 53 and 54: List 6. Amphibians and Reptiles Fiv
Page 55 and 56: in the NWT to salt plains habitat i
Page 67 and 68: Ocellate Creek Beetle Photo Credit:
Page 69 and 70: Bees, including bumblebees, are ext
Page 71 and 72: Butterflies are by far the most rec
Page 75 and 76: a Range Note: L = Species with limi
Page 77 and 78: and the larger better known groups
Page 81 and 82: The Odonates have large wings, elon
Page 85 and 86: Most species survive the winter as
Page 91 and 92: Third, they can be useful indicator
Page 95 and 96: Spiders (Araneae) belong to the art
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Many plant experts from the NWT and
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Edward Mock Wallflower Photo Credit
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Mosses are small, green, terrestria
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lichens Lichens are dual organisms,
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Data and Information Retrieving We
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Freshwater Mussels Clarke, A. H. 19
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Vascular Plants Aiken, S.G., Dallw
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10. Monitoring Infosheet To Partici
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NWT 2011-2015 - NWT Species at Risk

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