scholarly journals Triploidy effects growth, life history strategies, and bone health in Arctic char (Salvelinus alpinus), but does not impact cataract incidence

Aquaculture ◽  
2022 ◽  
Vol 547 ◽  
pp. 737465
Author(s):  
Thomas W.K. Fraser ◽  
Tom J. Hansen ◽  
Sofie C. Remø ◽  
Per Gunnar Fjelldal
Keyword(s):  
Life History ◽  
Bone Health ◽  
Salvelinus Alpinus ◽  
Arctic Char ◽  
Life History Strategies

scholarly journals Environmentally Modulated Repeat Evolution of Polymorphic Arctic Charr Life History Traits

2021 ◽  
Vol 9 ◽  
Author(s):  
Gabrielle Grenier ◽  
Aslak Smalås ◽  
Runar Kjær ◽  
Rune Knudsen
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Growth Parameters ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Local Environment ◽  
Life History Strategies ◽  
Age At Maturity ◽  
First Time ◽  
Sympatric Morphs

Sympatric Arctic charr, Salvelinus alpinus (L. 1758), morphs have flexible but repeated life history strategies tested across five Norwegian lakes. In several Scandinavian polymorphic Arctic charr populations differentiated by their diet and habitat use, a large littoral omnivorous (LO) morph commonly cooccurs with a smaller profundal spawning (PB/PZ) morph. A third, large piscivorous (PP) morph is also known to occur within a portion of Arctic charr populations in the profundal habitat along with the PB/PZ individuals. Life history traits, such as age at maturity, growth, and diet are known to differ among coexisting morphs. Notably, the PP morph was the longest morph with the oldest age at maturity while the PB/PZ morph showed the shortest lengths overall and youngest age with LO morph being intermediate in both traits. Growth parameters differed across all the morphs. When examining growth within morph groups, the LO morph was found to have different growth across all lakes, while similar reproductive investments and different energy acquisition patterns were seen within the PB/PZ and PP morphs. These results suggest repeat evolution in several life history strategies of reproductively isolated Arctic charr sympatric morphs, notably for the first time in the PP morph, while also highlighting the importance of the local environment in modulating life history traits.

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.

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

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

Contrasting life history strategies of sympatric Arctic charr morphs, Salvelinus alpinus

2013 ◽  
Vol 53 (10) ◽  
pp. 856-866 ◽  
Author(s):  
A. Smalås ◽  
P. -A. Amundsen ◽  
R. Knudsen
Keyword(s):  
Life History ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Life History Strategies

scholarly journals Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate

2021 ◽  
Author(s):  
Gabrielle Grenier ◽  
Ross F. Tallman
Keyword(s):  
Life History ◽  
Life Histories ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Growth Increment ◽  
Linear Increase ◽  
Growth Patterns ◽  
Life History Strategies ◽  
Changing Climate ◽  
Summer Growth

Arctic charr (Salvelinus alpinus Linneaus, 1758) are phenotypically variable with multiple life history strategies including anadromous and freshwater resident individuals. The mechanism determining life history is believed to be set early in life. Anadromous individuals show greater seasonality in growth and feeding after the first seaward migration relative to resident conspecifics. We used otolith growth increment measurements to estimate lifelong growth patterns for 355 individuals with anadromous or resident life history from four populations within Cumberland Sound, Nunavut. Using a general and a generalized linear model, we discovered a linear increase (estimate = 0.006) in growth for both Arctic charr life histories between 1990 and 2016. Resident Arctic charr have lower annual growth (estimate = -0.176) and show a decrease in the annual proportion of summer growth as they age (estimate = -0.042) while their anadromous counterparts maintain a higher seasonality in their growth patterns with age. This suggests that growth is indeed important in life history trajectory for Arctic charr and that seasonal growth patterns differ among life histories. The results highlight the importance of improving our understanding of mechanisms influencing life history trajectory in Arctic charr to ensure sustainability of harvested Arctic charr populations in a changing climate.

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

Depth and temperature preference of anadromous Arctic char Salvelinus alpinus in the Kitikmeot Sea, a shallow and low-salinity area of the Canadian Arctic

2020 ◽  
Vol 634 ◽  
pp. 175-197 ◽  
Author(s):  
LN Harris ◽  
DJ Yurkowski ◽  
MJH Gilbert ◽  
BGT Else ◽  
PJ Duke ◽  
...  
Keyword(s):  
Salvelinus Alpinus ◽  
Canadian Arctic ◽  
Arctic Char ◽  
Temperature Preference ◽  
Low Salinity
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