Cystidicola farionis (Nematoda) as an Indicator of Lake Trout (Salvelinus namaycush) of Bering Ancestry

1983 ◽  
Vol 40 (11) ◽  
pp. 2034-2040 ◽  
Author(s):  
Geoff A. Black
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
Lake Trout ◽  
Appalachian Mountains ◽  
River System ◽  
Salvelinus Namaycush ◽  
Glacial Retreat ◽  
Yukon River ◽  
Cystidicola Farionis

Cystidicola farionis Fischer is widely distributed in fishes in northern North America west of the Appalachian Mountains. The swimbladders of lake trout (Salvelinus namaycush) from 225 localities across North America were examined for the parasite but only those from the Alsek, Coppermine, Flat, Peel, Stikine, Upper Liard, and Yukon River systems were infected with mature nematodes. The ancestors of fishes in these watersheds survived glaciation in a Bering refugiurn. Thus, this strain of C. farionis probably had a refugium in Beringia in the unglaciated parts of the Yukon River system and dispersed from there into northern British Columbia and the coastal mainland of the Northwest Territories during glacial retreat.

Pissodes terminalis. [Distribution map].

2006 ◽  
Author(s):  
Keyword(s):  
British Columbia ◽  
North America ◽  
South Dakota ◽  
Northwest Territories ◽  
Geographical Distribution ◽  
Pinus Banksiana ◽  
Pinus Contorta ◽  
Jack Pine ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Pissodes terminalis Hopping. Coleoptera: Curculionidae. Hosts: Jack pine (Pinus banksiana) and lodgepole pine (Pinus contorta). Information is given on the geographical distribution in North America (Canada, Alberta, British Columbia, Manitoba, Northwest Territories, Saskatchewan, Yukon, USA, California, Colorado, Idaho, Montana, Oregon, South Dakota, Washington, Wyoming).

Phylogeographic origins of lake trout (Salvelinus namaycush) in eastern North America

1996 ◽  
Vol 53 (12) ◽  
pp. 2764-2775 ◽  
Author(s):  
C C Wilson ◽  
P DN Hebert
Keyword(s):  
North America ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Eastern North America

Mammalian and teleost cell line bioassay and chemically derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalent concentrations in lake trout (Salvelinus namaycush) from Lake Superior and Lake Ontario, North America

1998 ◽  
Vol 17 (11) ◽  
pp. 2214-2226 ◽  
Author(s):  
Jeff J. Whyte ◽  
Mike R. van den Heuvel ◽  
Janine H. Clemons ◽  
Susan Y. Huestis ◽  
Mark R. Servos ◽  
...  
Keyword(s):  
North America ◽  
Cell Line ◽  
Lake Trout ◽  
Lake Superior ◽  
Lake Ontario ◽  
Salvelinus Namaycush ◽  
Tetrachlorodibenzo P Dioxin

Fine-scale population structure in lake trout (Salvelinus namaycush) influenced by life history variation in the Husky Lakes drainage basin, Northwest Territories, Canada

2018 ◽  
Vol 75 (7) ◽  
pp. 1070-1081 ◽  
Author(s):  
Benjamin C. Kissinger ◽  
Les N. Harris ◽  
Danny Swainson ◽  
W. Gary Anderson ◽  
Margaret F. Docker ◽  
...  
Keyword(s):  
Life History ◽  
Northwest Territories ◽  
Brackish Water ◽  
Life Histories ◽  
Lake Trout ◽  
Drainage Basin ◽  
Salvelinus Namaycush ◽  
Life History Variation ◽  
Genetic Structuring ◽  
Nonbreeding Season

Partial anadromy is common within salmonid populations, where resident and anadromous individuals interbreed and overlap in habitat use during portions of life. Deviation to this definition occurs within the Husky Lakes drainage basin (HLDB), Northwest Territories, where freshwater resident, semi-anadromous, and brackish-water resident lake trout (Salvelinus namaycush) life history types are documented. In this study, microsatellite DNA variation was assayed to evaluate genetic structuring among life history types from the HLDB and adjacent lower Mackenzie River system. Significant differentiation was resolved among most locations and life histories (global FST = 0.192). Brackish-water residents were differentiated from all locations and life histories, including sympatric semi-anadromous individuals, providing evidence for genetically fixed strategies. Also, this provides the first evidence of breeding partial migration in salmonids using brackish-water environments, where brackish-water residents and semi-anadromous migrants interact during the nonbreeding season, but the latter migrate elsewhere to spawn. Alternatively, the lack of genetic differentiation between semi-anadromous and Sitidgi Lake residents suggests conditional mating tactics may also influence partial anadromy. This work provides novel insights into partial anadromy in Arctic salmonids and expands our knowledge of biodiversity in this region.

FACTORS INFLUENCING TRENDS OF POLYCHLORINATED NAPHTHALENES AND OTHER DIOXIN-LIKE COMPOUNDS IN LAKE TROUT (SALVELINUS NAMAYCUSH) FROM LAKE ONTARIO, NORTH AMERICA (1979–2004)

2009 ◽  
Vol 28 (5) ◽  
pp. 921 ◽  
Author(s):  
Sarah B. Gewurtz ◽  
Rocsana Lega ◽  
Patrick W. Crozier ◽  
D. Michael Whittle ◽  
Laila Fayez ◽  
...  
Keyword(s):  
North America ◽  
Lake Trout ◽  
Lake Ontario ◽  
Salvelinus Namaycush ◽  
Polychlorinated Naphthalenes ◽  
Factors Influencing

Anastrophyllum assimile and Marsupella revoluta, new to the interior of North America

1977 ◽  
Vol 55 (19) ◽  
pp. 2479-2484 ◽  
Author(s):  
Diana G. Horton
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
North American ◽  
Yukon Territory ◽  
The Arctic ◽  
Devon Island ◽  
New Localities ◽  
Central Eastern ◽  
Coastal British Columbia

Anastrophyllum assimile (Mitt.) Steph. and Marsupella revoluta (Nees) Lindb. are reported from the Keele Peak area, central-eastern Yukon Territory, Canada, and M. revoluta is also reported from Devon Island, Northwest Territories, Canada. These new localities extend a pattern of disjunct occurrences throughout the known range of both species, which further support the hypothesis of their relictual status. However, collections of A. assimile from coastal British Columbia and the Alexander Archipelago, Alaska, are indicative of strong oceanic affinities of North American populations of this species. Also, the arctic and alpine localities at which either A. assimile or M. revoluta might be expected to occur in the interior of Alaska and the Yukon are limited in number as both species invariably occur in association with siliceous substrates.

scholarly journals Fine-scale acoustic telemetry reveals unexpected lake trout, Salvelinus namaycush , spawning habitats in northern Lake Huron, North America

2017 ◽  
Vol 27 (2) ◽  
pp. 594-605 ◽  
Author(s):  
Thomas R. Binder ◽  
Steven A. Farha ◽  
Henry T. Thompson ◽  
Christopher M. Holbrook ◽  
Roger A. Bergstedt ◽  
...  
Keyword(s):  
North America ◽  
Acoustic Telemetry ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Lake Huron ◽  
Fine Scale ◽  
Spawning Habitats

Synchrony in the snowshoe hare (Lepus americanus) cycle in northwestern North America, 1970–2012

2013 ◽  
Vol 91 (8) ◽  
pp. 562-572 ◽  
Author(s):  
Charles J. Krebs ◽  
Knut Kielland ◽  
John Bryant ◽  
Mark O’Donoghue ◽  
Frank Doyle ◽  
...  
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
Time Window ◽  
Lepus Americanus ◽  
Adjacent Area ◽  
Lynx Lynx ◽  
Lynx Canadensis ◽  
Canada Lynx ◽  
Northwestern North America

Snowshoe hares (Lepus americanus Erxleben, 1777) fluctuate in 9–10 year cycles throughout much of their North American range. Regional synchrony has been assumed to be the rule for these cycles, so that hare populations in virtually all of northwestern North America have been assumed to be in phase. We gathered qualitative and quantitative data on hare numbers and fur returns of Canada lynx (Lynx canadensis Kerr, 1792) in the boreal forest regions of Alaska, Yukon, Northwest Territories, and northern British Columbia to describe synchrony in the time window of 1970–2012. Broad-scale synchrony in lynx fur returns was strong from 1970 to about 1995 but then seemed to break down in different parts of this region. Hare populations at 20 sites in Alaska, the Yukon, and Northwest Territories showed peak populations that lagged by 1–4 years during the 1990s and 2000s cycles. The simplest hypothesis to explain these patterns of asynchrony in hare cycles is the movement of predators from British Columbia north into the Yukon and then east into the Northwest Territories and west into Alaska. A traveling wave of these cycles is clearly seen in the lynx fur returns from western Canada and Alaska from 1970 to 2009. One consequence of a failure of synchrony is that hare predators like Canada lynx and Great-horned Owls (Bubo virginianus (Gmelin, 1788)) can move from one adjacent area to the next within this region and survive long enough to prolong low densities in hare populations that have declined earlier.

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