Restricted behavioural plasticity of juvenile lake charr, Salvelinus namaycush

1983 ◽  
Vol 8 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Moira M. Ferguson ◽  
David L.G Noakes ◽  
Dario Romani
Keyword(s):  
Salvelinus Namaycush ◽  
Behavioural Plasticity ◽  
Lake Charr

Life history differences between fat and lean morphs of lake charr (Salvelinus namaycush) in Great Slave Lake, Northwest Territories, Canada

Hydrobiologia ◽  
2016 ◽  
Vol 783 (1) ◽  
pp. 21-35 ◽  
Author(s):  
Michael J. Hansen ◽  
Nancy A. Nate ◽  
Louise Chavarie ◽  
Andrew M. Muir ◽  
Mara S. Zimmerman ◽  
...  
Keyword(s):  
Life History ◽  
Northwest Territories ◽  
Salvelinus Namaycush ◽  
Great Slave Lake ◽  
Lake Charr

scholarly journals If Arctic charr Salvelinus alpinus is ‘the most diverse vertebrate’, what is the lake charr Salvelinus namaycush ?

2015 ◽  
Vol 17 (4) ◽  
pp. 1194-1207 ◽  
Author(s):  
Andrew Michael Muir ◽  
Michael Jay Hansen ◽  
Charles Richard Bronte ◽  
Charles Conrad Krueger
Keyword(s):  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Salvelinus Namaycush ◽  
Lake Charr

Behavioural responses of lake charr (Salvelinus namaycush) embryos to simulated acidic runoff conditions

1987 ◽  
Vol 65 (11) ◽  
pp. 2786-2792 ◽  
Author(s):  
J. M. Gunn ◽  
D. L. G. Noakes ◽  
G. F. Westlake
Keyword(s):  
Salvelinus Namaycush ◽  
Low Ph ◽  
Swimming Ability ◽  
Runoff Water ◽  
Embryo Survival ◽  
Yolk Absorption ◽  
Counter Current ◽  
Avoidance Reactions ◽  
Lake Charr ◽  
Spawning Sites

Lake charr (Salvelinus namaycush) embryos in the later stages of yolk absorption avoided water with pH < 6.0. The addition of inorganic Al (≤ 200 μg∙L−1) did not increase the avoidance response to low pH. Embryos tested just after hatch had little swimming ability and showed no avoidance to acutely lethal H+ (pH 4.0). In vertical substrate-filled tanks that simulated conditions at natural spawning sites, there were no significant effects on embryo survival, or movement within the substrate from pulse exposure (8 h) to low pH (4.5) and elevated Al (100, 200, 500 μg∙L−1). Preference for contact with the substrate appeared to override the avoidance reactions observed in horizontal counter-current tanks. Thigmotaxis, combined with poor swimming ability of embryos, appears to eliminate the possibility that lake charr embryos will effectively avoid the acidic runoff water that enters the rubble of spawning sites during snowmelt.

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