Genetic architecture of body weight, condition factor and age of sexual maturation in Icelandic Arctic charr (Salvelinus alpinus)

2011 ◽  
Vol 286 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Eva Küttner ◽  
Hooman K. Moghadam ◽  
Skúli Skúlason ◽  
Roy G. Danzmann ◽  
Moira M. Ferguson
Keyword(s):  
Body Weight ◽  
Sexual Maturation ◽  
Genetic Architecture ◽  
Condition Factor ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Weight Condition

scholarly journals The dynamic ontogenetic patterns of adaptive divergence and sexual dimorphism in Arctic charr

2021 ◽  
Author(s):  
Marina De la Cámara ◽  
Lieke Ponsioen ◽  
Quentin J.B. Horta-Lacueva ◽  
Kalina H Kapralova
Keyword(s):  
Sexual Dimorphism ◽  
Sexual Maturation ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Common Garden ◽  
Open Water ◽  
Adaptive Divergence ◽  
Shape Variation ◽  
Ontogenetic Trajectories ◽  
Main Driver

ABSTRACTArctic charr (Salvelinus alpinus) in lake Thingvallavatn (Iceland) is one of the most iconic examples of post-glacial adaptive divergence, resulting in four ecomorphs that diverge along the ecological benthic-limnetic axis (bottom lake versus open water feeders), and are distinct both phenotypically and genotypically. Here, we used geometric morphometrics tools on a common garden setup to determine the factors responsible for genetically based shape variation during the post-embryonic ontogeny of two morphs that represent the benthic-limnetic axis: the small benthic (SB) and the planktivorous (PL). This experiment uses pure crosses and F1 reciprocal hybrids between the two morphs, and includes the onset of sexual maturation, offering an excellent opportunity to explore the genetic component of adaptive divergence and the role of sexual dimorphism in this scenario. We found that growth is the main driver of shape variation across time and provided evidence of a genetically-controlled ontogenetic shift that gives rise to the limnetic morph. Additionally, our results indicate that the onset of sexual maturation triggers differences both in sex ontogenetic trajectories and in static shape variation at different time points, likely dissipating the canalisation for traits traditionally associated with benthic-limnetic adaptations.

Winter condition and proximate composition of anadromous arctic charr (Salvelinus alpinus) in eastern Ungava Bay, Quebec

1990 ◽  
Vol 68 (11) ◽  
pp. 2284-2289 ◽  
Author(s):  
Thomas G. Boivin ◽  
G. Power
Keyword(s):  
Proximate Composition ◽  
Condition Factor ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Liver Lipid ◽  
Composition Analysis ◽  
Liver Protein ◽  
Muscle Lipid ◽  
Winter Condition ◽  
Anadromous Arctic Charr

Arctic charr (Salvelinus alpinus) were sampled during the winter of 1985–1986 in the Kangiqsualujjuaq area of northern Quebec to examine feeding patterns and temporal variation in condition. No feeding was observed at any time during the winter, and examination of gallbladder coloration indicated that feeding had not occurred for a long period of time. Proximate composition analysis of nonreproductive charr from Koroc River indicated that liver and muscle lipid and liver protein reserves changed during the winter fast, and this was most pronounced in early winter. Spent charr sampled at Lake Tasikallak had lower liver lipid and condition factor values and were more depleted than nonreproductive charr. Despite a reduction in lipids and protein during winter, the general condition of nonreproductive charr renders them suitable for commercial sale at any time of the year.

Impaired Swimming Performance of Acid-exposed Arctic Charr, Salvelinus Alpinus L.

1988 ◽  
Vol 23 (2) ◽  
pp. 301-307 ◽  
Author(s):  
L.A. Hunter ◽  
E. Scherer
Keyword(s):  
Dose Response ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Swimming Performance ◽  
Control Level ◽  
Ventilation Rates

Abstract Arctic charr (Salvelinus alpinus L.) were exposed to five levels of acidity between pH 6 and pH 3.8. Swimming performance as determined by critical swimming speeds was 67.5 cm · sࢤ1 or 4.4 body lengths per second for untreated fish (pH 7.8). Performance declined sharply below pH 4.5; at pH 3.8 it was reduced by 35% after 7 days of exposure. Tailbeat frequencies and ventilation rates showed no dose-response effects. At swimming speeds between 20 and 50 cm · sࢤ1, ventilation rates at all levels of acidity were higher than at the control level.

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