Spawning, Overwintering and Summer Feeding Habitats Used by Anadromous Arctic Char (Salvelinus alpinus) of the Hornaday River, Northwest Territories, Canada

ARCTIC ◽  
2014 ◽  
Vol 67 (4) ◽  
pp. 449 ◽  
Author(s):  
Lois A. Harwood ◽  
John A. Babaluk
Keyword(s):  
Northwest Territories ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Summer Feeding

Q-band chromosomal polymorphisms in arctic char (Salvelinus alpinus)

Genome ◽  
1989 ◽  
Vol 32 (1) ◽  
pp. 129-133 ◽  
Author(s):  
Kay A. Pleyte ◽  
Ruth B. Phillips ◽  
Sheila E. Hartley
Keyword(s):  
Northwest Territories ◽  
North American ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Chromosome Markers ◽  
Specific Variation ◽  
The Mean ◽  
Chromosomal Polymorphisms ◽  
Chromosomal Bands

Stock-specific variation in the number and location of quinacrine-staining chromosomal bands was found in North American and European stocks of arctic char (Salvelinus alpinus). The mean number of bands per genome varied from 5.8 ± 5.3 in the Northwest Territories stock to 15.4 ± 2.1 in the Scottish stock. These bands appear to represent a subset of heterochromatin since they stain darkly with the C-band technique. Since the four stocks examined were each distinguishable on the basis of their Q-band patterns, these chromosome markers should be useful in genetic comparisons between different arctic char stocks and populations.Key words: Q banding, chromosomes, polymorphisms, arctic char, Salvelinus alpinus.

An Isolated Population of Arctic Char (Salvelinus alpinus) Inhabiting a Warm Mineral Spring Above a Waterfall at Cache Creek, Northwest Territories

1974 ◽  
Vol 31 (8) ◽  
pp. 1408-1414 ◽  
Author(s):  
P. McCart ◽  
H. Bain
Keyword(s):  
Northwest Territories ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Isolated Population ◽  
Mineral Spring ◽  
Pyloric Caeca ◽  
Low Arctic ◽  
Oxygen Concentrations

Cache Creek Spring provides an unusual overwintering habitat for a population of Arctic char (Salvelinus alpinus) isolated above a falls impassable to fish moving upstream. During winter, water temperatures (14–16 C) and dissolved solid concentrations (approximately 2600 ppm) are high and oxygen concentrations (0.2–6.8 ppm) are low. Arctic char in the springs differ meristically from those downstream of the falls. The former have significantly more gillrakers (mean 21.7 compared with 21.1) and parr marks (15.1 and 13.5) but fewer pyloric caeca (26.0 and 28.2) and vertebrae (64.7 and 67.1) than the latter. Growth appears similar to that of char inhabiting more typical spring habitats.

PARASITES FROM NORTHERN CANADA: II. HAEMATOZOA OF FISHES

1961 ◽  
Vol 39 (4) ◽  
pp. 541-548 ◽  
Author(s):  
Marshall Laird
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Salvelinus Alpinus ◽  
Esox Lucius ◽  
Salvelinus Namaycush ◽  
Arctic Char ◽  
Coregonus Clupeaformis ◽  
Type Host ◽  
Large Size ◽  
First Time

Parasites were present in thin blood films from only 6 of 188 fishes of 11 species, collected in the Northwest Territories and northern Quebec. The haemoflagellate, Cryptobia gurneyorum (Minchin), is recorded from North America for the first time—from the type host, Esox lucius L., and from two new ones, Coregonus clupeaformis (Mitchill) and Salvelinus namaycush (Walbaum). Haemogregarina irkalukpiki n.sp., characterized by its large size (av., 17.2 by 3.2 μ) and nucleophilic habit, is described from two sea-run arctic char, Salvelinus alpinus (L.).

Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char (Salvelinus alpinus) from Lake Tasersuaq, Greenland

1986 ◽  
Vol 43 (5) ◽  
pp. 985-992 ◽  
Author(s):  
F. F. Riget ◽  
K. H. Nygaard ◽  
B. Christensen
Keyword(s):  
Salvelinus Alpinus ◽  
Somatic Growth ◽  
Arctic Char ◽  
Large Lake ◽  
Early Step ◽  
Ecological Segregation ◽  
Spawning Frequency ◽  
Size Groups ◽  
Summer Feeding ◽  
Ecological Forms

The population of Arctic char (Salvelinus alpinus) in a large lake, Tasersuaq, in West Greenland consisted of three distinct size groups representing ecological forms with differences in habitat, feeding, and reproduction. Smaller char were benthic and fed on chironomids whereas medium-sized char were living pelagically in summer, feeding on zooplankton. Larger char moved randomly over the strata, and cannibalism increased in importance with increasing size. Within each size group there was a great variation in age. All three groups contained spawners but spawning frequency variated between groups. Smaller forms probably transform to larger ones with correlated shifts in diet and periods of somatic growth only. We hypothesize that the ecological forms of the Tasersuaq population may represent an early step towards speciation. This view bridges the opposing interpretations of char populations presented in the literature considering different forms as belonging to either a common gene pool or to reproductively isolated sibling species.

scholarly journals Inuit knowledge and observations of changes in Arctic char (Salvelinus alpinus) and implications for subsistence livelihoods in Ulukhaktok, Northwest Territories, Canada

2021 ◽  
Author(s):  
◽  
Jessica Smart
Keyword(s):  
Northwest Territories ◽  
Environmental Changes ◽  
Salvelinus Alpinus ◽  
Local Environment ◽  
Water Levels ◽  
Arctic Char ◽  
Commercial Fishing ◽  
Detailed Knowledge ◽  
Structured Interviews ◽  
The Individual

This thesis documents and examines recent changes observed in anadromous Arctic char (Iqalukpik) (Salvelinus alpinus) in Ulukhaktok, Northwest Territories, Canada, including how these changes are being experienced and responded to by community members. Ulukhaktomiut identified a need to document their knowledge and observations of Arctic char to help inform comanagement. The analysis of 20 semi-structured interviews with Ulukhaktomiut revealed six main concerns about Arctic char linked to changes arising in the local environment: (1) presence of salmon, (2) increasing temperature, (3) inconsistent sea and lake ice conditions, (4) changing weather patterns, (5) fluctuating water levels, and (6) the recent presence of tunicates in the ocean. Ulukhaktomiut respond to these changes at the individual and community levels, including altering fishing practices and temporarily halting commercial fishing. The results show that Ulukhaktomiut are astute observers of their local environment and are able to share highly detailed knowledge and observations of Arctic char. Environmental changes are emerging quickly, and there is a great deal of uncertainty among Ulukhaktomiut about why these changes are occurring and what impact they may have on Arctic char. Fisheries management structures will need to be flexible and responsive to ongoing local observations and the best available science to sustain a viable Arctic char fishery now and into the future.

First confirmation of salmonid alphavirus infection in Arctic char Salvelinus alpinus and in Austria

2018 ◽  
Vol 130 (1) ◽  
pp. 71-76
Author(s):  
E Lewisch ◽  
T Frank ◽  
H Soliman ◽  
O Schachner ◽  
A Friedl ◽  
...  
Keyword(s):  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Alphavirus Infection

scholarly journals Investigating the morphological and genetic divergence of arctic char ( Salvelinus alpinus) populations in lakes of arctic Alaska

2021 ◽  
Author(s):  
Stephen L. Klobucar ◽  
Jessica A. Rick ◽  
Elizabeth G. Mandeville ◽  
Catherine E. Wagner ◽  
Phaedra Budy
Keyword(s):  
Genetic Divergence ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Arctic Alaska

Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char (Salvelinus alpinus) in Northern Norway

1994 ◽  
Vol 51 (6) ◽  
pp. 1229-1246 ◽  
Author(s):  
Knut Kristoffersen ◽  
Morten Halvorsen ◽  
Lisbeth Jørgensen
Keyword(s):  
Salvelinus Alpinus ◽  
Relative Size ◽  
Significant Negative Correlation ◽  
Relative Volume ◽  
Arctic Char ◽  
Northern Norway ◽  
Length Relationship ◽  
Lake Morphology ◽  
Different Populations ◽  
Profundal Zone

Anadromy of nine lake populations of Arctic char (Salvelinus alpinus) in northern Norway was scored on the following criteria: prevalence of marine parasites, fish size, and size at maturity. In general, anadromy dominated in shallow lakes and residency dominated in deep lakes. The anadromy scores of the populations were significantly higher in lakes without a profundal zone compared with lakes with a profundal zone. There was also a significant negative correlation between the relative volume of the profundal zone (RPV) and the degree of anadromy and between RPV and mean parr length at ages 2+ and 3+. However, differences in parr growth could not explain all the observed variation in anadromy, and the correlation between mean parr length at ages 2+ and 3+ and the degree of anadromy in the different populations was not significant. In addition to the effect on parr growth, lake morphology seemed to influence the degree of anadromy through the relative size of different habitats, which in turn affects the number of available niches. The parr weight/length relationship and infection with the freshwater parasites Phyllodistomum umblae and Diphyllobothrium spp. did not affect the degree of anadromy.

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