Life History and Taxonomic Status of an Isolated Population of Arctic Char, Salvelinus alpinus, from Gros Morne National Park, Newfoundland

1978 ◽  
Vol 35 (12) ◽  
pp. 1537-1541 ◽  
Author(s):  
P. J. Rombough ◽  
S. E. Barbour ◽  
J. J. Kerekes
Keyword(s):  
Life History ◽  
North America ◽  
National Park ◽  
Salvelinus Alpinus ◽  
Atlantic Coast ◽  
Fork Length ◽  
Taxonomic Status ◽  
Arctic Char ◽  
Insect Larvae ◽  
Meristic Characters

Landlocked Arctic char, Salvelinus alpinus, from Candlestick Pond, Gros Morne National Park, Newfoundland, were characterized by slow growth, short life span (max 7 yr), and small size (max fork length = 164 mm). Sexual maturity was obtained at age 3, fecundity was low (max 104 ova per fish), and spawning annual. Major food items were zooplankton and aquatic insect larvae. Eight morphometric and eight meristic characters were examined and compared with available literature data for nonanadromous S. alpinus in eastern North America. Arctic char from Candlestick Pond were not significantly different from S. alpinus oquassa from Quebec and Maine but were significantly different from char from Labrador and other locations in insular Newfoundland. It is proposed that Arctic char from Candlestick Pond are descendents of an aboriginal form of S. alpinus that has been largely displaced along the Atlantic coast of North America. Key words: Salvelinus alpinus, Newfoundland, life history, taxonomic status

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.

Metazoan parasites of arctic char (Salvelinus alpinus L.) in a high arctic, landlocked lake in Canada

1978 ◽  
Vol 56 (2) ◽  
pp. 365-368 ◽  
Author(s):  
M. Beverley-Burton
Keyword(s):  
North America ◽  
Fresh Water ◽  
Salvelinus Alpinus ◽  
High Arctic ◽  
Arctic Char ◽  
Metazoan Parasites ◽  
Cornwallis Island

Seven species of parasitic metazoans were found in 71 arctic char (Salvelinus alpinus L.) taken in Char Lake, Cornwallis Island, N.W.T., Canada (74°42′ N, 94°50′ W): Tetraonchus alaskensis (Monogenea); Diphyllobothrium sp. (plerocercoids), Eubothrium salvelini, Eubothrium sp., and Proteocephalus longicollis (Cestoidea); Cystidicola cristivomeri (Nematoda) and Salmincola edwardsii (Crustacea: Copepoda). Except for S. edwardsii these reports, from a population of S. alpinus which is confined to fresh water, constitute new northerly distribution records for North America. Reports of P. longicollis and C. cristivomeri from S. alpinus in Canada have not been published previously.

scholarly journals Genetic Stock Identification and Relative Contribution of Arctic Char (Salvelinus alpinus) from the Hornaday and Brock Rivers to Subsistence Fisheries in Darnley Bay, Northwest Territories + Supplementary Appendix Tables S1 to S4 (See Article Tools)

ARCTIC ◽  
2016 ◽  
Vol 69 (3) ◽  
pp. 231
Author(s):  
Les N. Harris ◽  
David A. Bogsuski ◽  
Colin P. Gallagher ◽  
Kimberly L. Howland
Keyword(s):  
Life History ◽  
Genetic Differentiation ◽  
Salvelinus Alpinus ◽  
Canadian Arctic ◽  
Arctic Char ◽  
Genetic Stock ◽  
Subsistence Fisheries ◽  
Bay Area ◽  
Sampling Locations ◽  
Mixed Stock

Where anadromous fishes occur in the Canadian Arctic, they provide the mainstay of local subsistence fisheries of varying intensities. Many of these fisheries harvest a mixture of stocks at discrete locations and it is often not known which stocks, specifically, are being harvested and to what extent. In the Darnley Bay area of the Northwest Territories, Arctic char, Salvelinus alpinus, in particular have long provided an important subsistence resource to residents of Paulatuk, and char from two systems (the Hornaday and Brock Rivers) are thought to contribute to the coastal fishery for this species. Genetic mixed-stock analysis (GMA) is routinely applied for resolving stock contributions to such fisheries, yet studies incorporating GMA to understand specifically which stocks are being harvested in the Canadian Arctic, and to what extent, are relatively scarce. In this study, we assayed microsatellite DNA variation among 987 Arctic char from two important coastal subsistence fisheries and several inland sampling locations in the Darnley Bay area to (1) assess the degree of genetic structuring between the Hornaday and Brock Rivers and (2) resolve the proportional contributions of these stocks to coastal mixed-stock fisheries in the region using GMA. Overall, genetic differentiation was relatively high and significant (θ = 0.117; 95% C.I. = 0.097–0.142) among baseline sampling locations. Overall patterns of genetic stock structure also support previous hypotheses that additional life history types (e.g., landlocked or freshwater-resident char, or both) exist in the Hornaday system, as indicated by elevated levels of genetic differentiation between some of our sampling locations. The GMA suggested that, while both river systems contribute to the coastal fishery, catches were dominated by Arctic char from the Hornaday River, which highlights the importance of this system. All told, our results may be relevant to the management of the subsistence fishery in Darnley Bay and for furthering the collective understanding of char biodiversity and life history variation in the Canadian Arctic.

Cannibalism and trophic structure in a high Arctic lake: insights from stable-isotope analysis

1995 ◽  
Vol 52 (6) ◽  
pp. 1195-1201 ◽  
Author(s):  
Keith A. Hobson ◽  
Harold E. Welch
Keyword(s):  
Primary Production ◽  
Food Web ◽  
Salvelinus Alpinus ◽  
Trophic Position ◽  
Isotope Analysis ◽  
Fork Length ◽  
Isotope Ratios ◽  
High Arctic ◽  
Arctic Char ◽  
Small Fish

Stable-nitrogen (15N/14N) isotope ratios (from 2.1‰ in moss to 14.5‰ in Arctic char, Salvelinus alpinus), showed enrichment with trophic level in the food web of Char Lake, Northwest Territories, and may be used to infer trophic position. The average 15N enrichment of 1.5‰ between moss or algae and invertebrates suggests input to the food web of isotopically lighter nitrogen than that measured for these sources of primary production. Stable-carbon (13C/12C) isotope ratios differed between moss and algae by almost 10‰ and indicate that carbon in the Char Lake food web is derived from a blend of these sources of primary production. Arctic char δ15N values for muscle tissue were positively correlated with fork length and clustered into three distinct groups: small fish (1–3 cm, mean δ15N = 5.7‰), which possibly consumed more benthic particles than previously assumed; intermediate-size fish (10–35 cm, mean δ15N = 10‰), which likely depended on larval char as well as their primary zooplankton and chironomid prey; and larger Arctic char, which showed a mean stepwise increase in δ15N of 3.7‰. This suggests that complete cannibalism in this population generally occurs abruptly and is exercised by a relatively small number of large individuals.

Genetic basis of life history variations among sympatric morphs of Arctic char Salvelinus alpinus

1996 ◽  
Vol 53 (8) ◽  
pp. 1807-1813 ◽  
Author(s):  
S Skúlason ◽  
S S Snorrason ◽  
D LG Noakes ◽  
M M Ferguson
Keyword(s):  
Life History ◽  
Genetic Basis ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Sympatric Morphs

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.).

Life history of anadromous arctic charr, Salvelinus alpinus, in the Fraser River, northern Labrador

1985 ◽  
Vol 63 (2) ◽  
pp. 315-324 ◽  
Author(s):  
J. B. Dempson ◽  
J. M. Green
Keyword(s):  
Life History ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Fork Length ◽  
Fraser River ◽  
Large Variability ◽  
Anadromous Arctic Charr ◽  
North American Arctic ◽  
History Of ◽  
Length Variable

Upstream migrations of anadromous Arctic charr, Salvelinus alpinus, were monitored in the Fraser River, Labrador. Samples of charr were randomly obtained from 1975 to 1979 for biological analysis of age, growth, reproductive, and migratory characteristics. The run begins in mid-July and extends until late September. Larger charr tend to enter the river first with a progressive decrease in mean length throughout the run. Size and age composition of migrant charr range from 13 to 82 cm ([Formula: see text], 45.1 ± 7.3) and from 3 to 18 years (8.3 ± 1.7), respectively. Spawning activity peaks during the last 2 weeks in October. Fecundity of fish 41–61 cm in fork length ranged from 2316 to 9245 eggs (4665 ± 434) with approximately 75% of females mature by 8 years of age. There was no evidence from tag recaptures over an 8-year period (1976–1983; N = 241) that Fraser River charr undergo extensive marine migrations. Approximately 84% of the recaptures were from fish which either returned to the Fraser River or were caught in commercial and domestic fisheries in adjacent Nain and Tikkoatokak bays. In comparison with other North American Arctic charr populations, Fraser River charr are similar with respect to the large variability observed in age at length, variable maturation cycle, and preponderance of females at sea during the summer. Differences, however, occur among individual life history characteristics such as growth rate, size and age at first seaward migration, size and age at maturity, fecundity, and movements at sea.

Sign in / Sign up

Export Citation Format

Share Document