Meristic Differences Between Anadromous and Freshwater-Resident Arctic Char (Salvelinus alpinus) in the Sagavanirktok River Drainage, Alaska

1971 ◽  
Vol 28 (1) ◽  
pp. 115-118 ◽  
Author(s):  
P. McCart ◽  
P. Craig
Keyword(s):  
Bering Sea ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
River Drainage ◽  
Pyloric Caeca ◽  
Headwater Lakes ◽  
Western Arctic ◽  
Resident Populations ◽  
Gill Raker ◽  
Freshwater Resident

Both anadromous and freshwater-resident populations of Arctic char (Salvelinus alpinus) occur in the Sagavanirktok River drainage, Alaska. A comparison of the gill-raker and pyloric-caeca counts of populations of the two types revealed that anadromous fish had lower gill-raker and pyloric-caeca counts than freshwater-resident fish. Freshwater-resident populations correspond meristically to McPhail's Eastern Arctic form, and anadromous population scor-respond to his Western Arctic–Bering Sea form (McPhail, J. Fish. Res. Bd. Canada 18: 793–816, 1961). It is suggested that the former was the original inhabitant of the area but has been replaced by the latter except in inaccessible, headwater lakes.

Life History of Two Isolated Populations of Arctic Char (Salvelinus alpinus) in Spring-Fed Tributaries of the Canning River, Alaska

1973 ◽  
Vol 30 (8) ◽  
pp. 1215-1220 ◽  
Author(s):  
P. McCart ◽  
P. Craig
Keyword(s):  
Growth Rates ◽  
Bering Sea ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Isolated Populations ◽  
Meristic Characters ◽  
History Of ◽  
Western Arctic ◽  
Mature Fish ◽  
Two Populations

Two isolated populations of Arctic char (Salvelinus alpinus) in spring-fed tributaries of the Canning River, Alaska, had meristic characters that corresponded to those of the Western Arctic–Bering Sea form of Arctic char. The two populations demonstrated slight differences in growth rates, age at maturity, longevity, and food habits. The fish were characterized by small size (maximum 235 mm), low growth rates, low fecundities (maximum 199 eggs), and annual spawning after maturity. Mature fish were darkly pigmented and parr marks were retained throughout life. The spawning season appeared to be sometime in November, when the eggs of mature females averaged 3.8 mm in diameter.

Bulbodacnitis alpinus sp. nov. (Nematoda: Cucullanidae) from Arctic char, Salvelinus alpinus L., with notes on other species of Bulbodacnitis

1974 ◽  
Vol 52 (4) ◽  
pp. 441-446 ◽  
Author(s):  
Dwight R. Mudry ◽  
Peter McCart
Keyword(s):  
Salvelinus Alpinus ◽  
Arctic Char ◽  
North Slope ◽  
The North ◽  
Freshwater Resident

Bulbodacnitis alpinus sp. nov. is described from Salvelinus alpinus L. from the North Slope of Yukon and Alaska. Bulbodacnitis alpinus was found to be present in both anadromous and freshwater resident stream populations but it is absent from lake populations of S. alpinus. Specimens of B. occidentalis Smedley, 1933, B. scotti Simon, 1935, B. ampullastoma Maggenti, 1971, and B. truttae (Fabricius, 1794) were examined and comparative measurements are presented. Bulbodacnitis scotti, B. ampullastoma, and B. occidentalis are considered synonyms of B. truttae.

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.

Movements of Stream-Resident and Anadromous Arctic Char (Salvelinus alpinus) in a Perennial Spring on the Canning River, Alaska

1978 ◽  
Vol 35 (1) ◽  
pp. 48-52 ◽  
Author(s):  
P. C. Craig
Keyword(s):  
Key Words ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Spawning Area ◽  
Perennial Springs ◽  
Freshwater Resident ◽  
Overwintering Area

Perennial springs in arctic drainages are used extensively by freshwater-resident and anadromous segments of Arctic char (Salvelinus alpinus) populations. Movements of these fish were monitored in a small spring on the Canning River from May 23 to October 7, 1973, dates approximating spring breakup and winter freeze-up in the drainage. Char passing through the weir ranged in size from 22-mm fry to 595-mm anadromous spawners, though most fish were juveniles measuring 60–200 mm. The spring channel was utilized as (1) a spawning area for anadromous spawners and residual males in autumn, (2) a rearing area for fry and some older juveniles in summer, and most importantly (3) an overwintering area for juvenile char, especially those in their first and second winters of life. Key words: Arctic char, movements, spawning, overwintering, growth, perennial springs, Alaska, arctic

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.

Respiratory development in Arctic char Salvelinus alpinus under conditions of normoxia and chronic hypoxia

1977 ◽  
Vol 55 (9) ◽  
pp. 1461-1467 ◽  
Author(s):  
D. G. McDonald ◽  
B. R. McMahon
Keyword(s):  
Heart Rate ◽  
Surface Morphology ◽  
Chronic Hypoxia ◽  
Prolonged Exposure ◽  
Salvelinus Alpinus ◽  
Ventilation Rate ◽  
Arctic Char ◽  
Adult Fish ◽  
Weighted Averages ◽  
Secondary Lamellae

Changes in surface morphology of the gills, ventilation rate, and heart rate were examined in Arctic char larvae exposed to normoxia (pO2 = 121 ± 6 (SE) mmHg) or chronic hypoxia (pO2 = 33 ± 3.5 mmHg) for 47 days after hatching. A modified weighted-averages technique was developed to measure aspects of gill morphology.Early development of the gills was characterized by rapid increases in filament size and number, and the emergence and proliferation of secondary lamellae. Variations in the dimensions of the gills, as noted in adult fish, were particularly evident in the larval fish.Hypoxia caused increases in both ventilation rate and heart rate. Prolonged exposure led to a retardation of gill growth, particularly the proliferation of secondary lamellae. However, growth of individual lamellae was stimulated between 38 and 47 days.

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