The effects of low pH, low calcium concentrations and elevated aluminium concentrations on sodium fluxes in brown trout, Salmo Trutta L.

1986 ◽  
Vol 30 (3-4) ◽  
pp. 569-577 ◽  
Author(s):  
T. R. K. Dalziel ◽  
R. Morris ◽  
D. J. A. Brown
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Low Ph ◽  
Low Calcium ◽  
Brown Trout Salmo Trutta

The resting membrane potential of white muscle from brown trout (Salmo trutta) exposed to copper in soft, acidic water

2000 ◽  
Vol 203 (14) ◽  
pp. 2229-2236 ◽  
Author(s):  
M.W. Beaumont ◽  
E.W. Taylor ◽  
P.J. Butler
Keyword(s):  
Membrane Potential ◽  
Brown Trout ◽  
Salmo Trutta ◽  
White Muscle ◽  
Low Ph ◽  
Ammonium Ion ◽  
Muscle Membrane ◽  
Resting Membrane Potential ◽  
Muscle Fibres ◽  
Brown Trout Salmo Trutta

Previously, the distribution of ammonia between the intracellular and extracellular compartments has been used to predict a significant depolarisation of the resting membrane potential (E(M)) of white muscle from brown trout (Salmo trutta) exposed to a sub-lethal combination of copper and low pH. However, this prediction is based upon two assumptions (i) a relatively high membrane permeability for the ammonium ion with respect to that for ammonia gas and (ii) that this is unaltered by exposure to copper and low pH. Since there is conflicting evidence in the literature of the validity of these assumptions, in the present study E(M) was directly measured in white muscle fibres of trout exposed to copper and low pH (E(M)=−52.2+/−4.9 mV) and compared with that of unexposed, control animals (E(M)=−86.5+/−2.9 mV) (means +/− s.e.m., N=6). In confirming the predicted depolarisation, these data support the hypothesis of electrophysiological impairment as a factor in the reduction in the swimming performance of trout exposed to these pollutants. In addition, the results of this study support the role of a significant permeability of the muscle membrane to NH(4)(+) in determining the distribution of ammonia in fish.

Influence of low pH on brown trout, Salmo trutta

1991 ◽  
Vol 24 (4) ◽  
pp. 2470-2473
Author(s):  
Helmut Segner ◽  
Harald Gebhardt ◽  
Michael Linnenbach ◽  
Roland Marthaler ◽  
Andreas Ness
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Low Ph ◽  
Brown Trout Salmo Trutta

Effects of low ph on the uptake and distribution of54Mn(II) in brown trout (Salmo trutta)

1996 ◽  
Vol 15 (5) ◽  
pp. 708-710
Author(s):  
Claude Rouleau ◽  
Hans Tjälve ◽  
James Gottofrey
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Low Ph ◽  
Brown Trout Salmo Trutta
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