Swimming performance of brown trout and grayling show species‐specific responses to changes in temperature

2018 ◽  
Vol 28 (2) ◽  
pp. 241-246
Author(s):  
Annette Taugbøl ◽  
Kjetil Olstad ◽  
Kim Magnus Bærum ◽  
Jon Museth
Keyword(s):  
Brown Trout ◽  
Swimming Performance ◽  
Species Specific

scholarly journals Interactive Effects of Seasonal Temperature and Low pH on Resting Oxygen Uptake and Swimming Performance of Adult Brown Trout Salmo Trutta

1992 ◽  
Vol 165 (1) ◽  
pp. 195-212 ◽  
Author(s):  
P. J. BUTLER ◽  
N. DAY ◽  
K. NAMBA
Keyword(s):  
Oxygen Uptake ◽  
Brown Trout ◽  
Swimming Performance ◽  
Low Ph ◽  
Swimming Activity ◽  
Acid Water ◽  
Muscle Fibres ◽  
Seasonal Temperature ◽  
Neutral Ph ◽  
Red Muscle

Adult brown trout were acclimated for 2–4 weeks to artificial, soft water (Ca2+ 25μmoll−1) at neutral pH and at summer (15°C) or winter (5°C) temperatures. During this period they swam against a current of approximately 0.25 ms−1. They were then exposed to neutral or sublethal pH for 4 days in still water. For fish with their dorsal aorta catheterized, sublethal pH was 4 at 5°C and 4.5 at 15°C. After 4 days of exposure to sublethal pH, resting oxygen uptake (Mo2 w a s 40 % higher than that at neutral pH for fish held at 15°C and 38 % higher for fish held at 5°C. Critical swimming speeds (Ucrit), in contrast, were 35% and 31% lower, respectively. These two phenomena may be related in as much as the ‘metabolic cost’ of exposure to low pH may increase as swimming speed increases, thus reducing the scope for activity. Another important factor could be an impairment of oxygen delivery to the red muscle fibres. Although arterial O2 concentrations and heart rate are both similar for fish at Ucrit in neutral and acid water, there are signs of haemoconcentration in fish exposed to low pH, and the consequent increase in blood viscosity could disrupt the local circulation in the red fibres. Whatever its causes, an impairment of swimming activity resulting from exposure to acid water may have severe consequences for active fish such as salmonids. Exposure to sublethal pH caused significant reductions in plasma Na+ and Cl− concentrations at both temperatures, although these were more substantial at 5°C than at 15°C. Swimming at Ucrit had no significant effect on plasma concentrations of Na+, K+ and Cl− except at sublethal pH at 5°C, when there were significant reductions in all three. Seasonal temperature had significant but small effects on resting MO2 and Ucrit, and these are discussed in terms of the possible effects of low temperature and continued swimming activity (training) on hypertrophy of skeletal and cardiac muscles and on the aerobic capacity of the ‘red’ muscle fibres.

THE RELATIONSHIP BETWEEN INTRACELLULAR pH AND SWIMMING PERFORMANCE OF BROWN TROUT EXPOSED TO NEUTRAL AND SUBLETHAL pH

1993 ◽  
Vol 176 (1) ◽  
pp. 271-284 ◽  
Author(s):  
P. J. Butler ◽  
N. Day
Keyword(s):  
Intracellular Ph ◽  
Brown Trout ◽  
Swimming Performance ◽  
Plasma Catecholamines ◽  
Muscle Fibres ◽  
Arterial Pco2 ◽  
Neutral Ph ◽  
Red Muscle ◽  
The Relationship ◽  
A Current

Adult brown trout were acclimated for 2–4 weeks to artificial soft water ([Ca2+] 25 micromolar) at neutral pH and at summer (15°C) temperature. During this period they swam against a current of approximately 0.25 m s-1. They then had their dorsal aorta cannulated and were exposed to neutral or sublethal pH (4.5) for 4 days in still water. After 4 days of exposure to sublethal pH, critical swimming speed (Ucrit) was 35 % lower than that for fish at neutral pH. There were significant increases in arterial PCO2 and in blood lactate concentrations at Ucrit compared with the values in resting fish at neutral pH and these led to significant reductions in plasma pH. There were no such changes in fish at sublethal pH. There were no significant changes in intracellular pH (pHi) of red blood cells at Ucrit, probably as a result of increases in the levels of plasma catecholamines. There were significant reductions in pHi of red and white muscle fibres at Ucrit. It is argued that these values were not as low in the white fibres as those seen in previous studies after fish have been chased to exhaustion and, therefore, that the fish in the present study were not completely exhausted, although they would no longer swim at a steady speed. As pHi of the red muscle was the same at Ucrit for fish at neutral and at sublethal pH, it is suggested that Ucrit (fatigue) coincides with a particular pHi of the red muscles and possible mechanisms are discussed.

Lack of species-specific primer effects of odours from female Atlantic salmon, Salmo salar , and brown trout, Salmo trutta

Oikos ◽  
2000 ◽  
Vol 88 (1) ◽  
pp. 213-220 ◽  
Author(s):  
K. Håkan Olsén ◽  
Rickard Bjerselius ◽  
Erik Petersson ◽  
Torbjörn Järvi ◽  
Ian Mayer ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Specific Primer ◽  
Atlantic Salmon Salmo Salar ◽  
Brown Trout Salmo Trutta ◽  
Species Specific
Sign in / Sign up

Export Citation Format

Share Document