scholarly journals Mechanical Role of the Syntectonic Laloche Batholith in the Great Slave Lake Shear Zone, District of Mackenzie, Northwest Territories

1986 ◽  
Author(s):  
S Hanmer ◽  
J N Connelly
Keyword(s):  
Northwest Territories ◽  
Shear Zone ◽  
Great Slave Lake

Fecundity Comparisons for Various Stocks of Lake Whitefish, Coregonus clupeaformis

1975 ◽  
Vol 32 (3) ◽  
pp. 404-407 ◽  
Author(s):  
M. C. Healey ◽  
C. W. Nicol
Keyword(s):  
Northwest Territories ◽  
Lake Erie ◽  
Fork Length ◽  
Nonlinear Relationship ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Limited Data ◽  
Relative Fecundity ◽  
Great Slave Lake ◽  
The Relationship

We found no significant differences in slope or intercept for the regression of loge fecundity on loge fork length among samples of whitefish from four lakes near Yellowknife in the Northwest Territories. The equation describing the relationship between fecundity and fork length for these populations was:[Formula: see text]Five other populations for which length–fecundity relationships could be calculated had length exponents ranging from 3.20 to 4.38, suggesting a nonlinear relationship between weight and fecundity. Six of the nine populations as well as four others for which limited data were available all had similar relative fecundities. Fish from Buck Lake in Alberta and from Lake Erie had high relative fecundities while fish from Great Slave Lake had low relative fecundity.

Overall and repeated floral visitation by insects suggests flower flies (Syrphidae) as the major pollinator group of Alaska Wild Rhubarb (Koenigia alaskana var. glabrescens; Polygonaceae) in Northwest Territories, Canada

2021 ◽  
Vol 135 (2) ◽  
pp. 186-191
Author(s):  
Paul M. Catling ◽  
Brenda Kostiuk ◽  
Jeffrey H. Skevington
Keyword(s):  
Northwest Territories ◽  
Limiting Factor ◽  
Alpine Plant ◽  
Floral Visitors ◽  
Floral Visitation ◽  
Ecological Importance ◽  
Flower Flies ◽  
Northwestern North America ◽  
Northeast Corner

Alaska Wild Rhubarb (Koenigia alaskana var. glabrescens; Polygonaceae) is a native Arctic, subarctic, and alpine plant of northwestern North America. Although the plant has some economic and ecological importance, its biology is poorly known. At 11 sites in the northeast corner of its range in Northwest Territories, we found that 87% of its floral visitors were flies, mostly Syrphidae, a diverse family known to be important pollinators. Insects visiting consecutive flowers on different plants and, thus, likely effecting pollination were also flies (78.6%) and also mostly Syrphidae (72.7%) followed by Hymenoptera (20%). Although syrphids were the dominant potential pollinators at most sites, there was some variation among sites. Our results provide quantitative support for pollinator diversity and the major role of Syrphidae in pollination of Alaska Wild Rhubarb. We suggest that pollination is not a limiting factor in this plant’s spread, nor its rare and local occurrence and restricted distribution, because the majority of its pollinators are widespread.

Life history differences between fat and lean morphs of lake charr (Salvelinus namaycush) in Great Slave Lake, Northwest Territories, Canada

Hydrobiologia ◽  
2016 ◽  
Vol 783 (1) ◽  
pp. 21-35 ◽  
Author(s):  
Michael J. Hansen ◽  
Nancy A. Nate ◽  
Louise Chavarie ◽  
Andrew M. Muir ◽  
Mara S. Zimmerman ◽  
...  
Keyword(s):  
Life History ◽  
Northwest Territories ◽  
Salvelinus Namaycush ◽  
Great Slave Lake ◽  
Lake Charr

Variability in ice phenology on Great Bear Lake and Great Slave Lake, Northwest Territories, Canada, from SeaWinds/QuikSCAT: 2000–2006

2009 ◽  
Vol 113 (4) ◽  
pp. 816-834 ◽  
Author(s):  
Stephen E.L. Howell ◽  
Laura C. Brown ◽  
Kyung-Kuk Kang ◽  
Claude R. Duguay
Keyword(s):  
Northwest Territories ◽  
Bear Lake ◽  
Great Slave Lake ◽  
Ice Phenology

Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories

1979 ◽  
Vol 16 (1) ◽  
pp. 60-72 ◽  
Author(s):  
J. P. N. Badham
Keyword(s):  
Northwest Territories ◽  
Field Data ◽  
Easter Island ◽  
Chemical Data ◽  
Lower Proterozoic ◽  
Great Slave Lake ◽  
Data Support ◽  
Igneous Complexes ◽  
Igneous Activity ◽  
History Of

Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was rotated subsequent to emplacement such that both top and bottom are now exposed. Field and petrographic data are indicative of progressive differentiation along (i.e., up) the dyke and are substantiated by chemical data. The differentiation history of the early gabbros of the Blachford Lake complex is similar. Late differentiates of both complexes closely resemble the igneous matrices of the breccias and petrographic and chemical data support the proposal of cogenesis and contemporaneity.The field data show that there was a period of significant faulting and concomitant alkaline igneous activity in the East Arm area in the lower Proterozoic.

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