Thermal variation near the thermal optimum does not affect the growth, metabolism or swimming performance in wild Atlantic salmon ( Salmo salar )

2020 ◽  
Author(s):  
Jenna Morissette ◽  
Sula Swart ◽  
Tyson J. MacCormack ◽  
Suzanne Currie ◽  
Andrea J. Morash
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Swimming Performance ◽  
Thermal Variation ◽  
Atlantic Salmon Salmo Salar ◽  
Growth Metabolism

Effect of Dummy Telemetry Transmitters on Stamina of Atlantic Salmon (Salmo salar) Smolts

1975 ◽  
Vol 32 (4) ◽  
pp. 559-563 ◽  
Author(s):  
James D. McCleave ◽  
Kristin A. Stred
Keyword(s):  
Regression Analysis ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Swimming Performance ◽  
Linear Regression Analysis ◽  
Control Groups ◽  
Radio Transmitter ◽  
Atlantic Salmon Salmo Salar ◽  
Radio Transmitters ◽  
Better Than

Effects of three different-sized, internally placed dummy ultrasonic transmitters and one size externally placed dummy radio transmitter on swimming performance of Atlantic salmon (Salmo salar) smolts were determined. Critical swimming speeds were similar for fish in control groups and two of the groups tagged with internal transmitters. The widest internal dummy tag (19 mm long × 10 mm diameter) caused a significant (P < 0.05) decrement in swimming performance; the size representing the smallest available transmitters (33 mm long × 8 mm diameter) did not. Linear regression analysis of this latter group demonstrated that larger smolts carried the transmitter better than smaller smolts. Results indicated that fish longer than about 20 cm can successfully be tagged with the available transmitter. Externally placed dummy radio transmitters caused a highly significant (P < 0.01) decrease in swimming speed compared with that of controls.

Body shape and fin size in juvenile Atlantic salmon (Salmo salar): effects of temperature during embryogenesis

2021 ◽  
pp. 381-389
Author(s):  
Larry Greenberg ◽  
Bror Jonsson ◽  
Johnny R. Norrgård ◽  
Ann Erlandsson ◽  
Eva Bergman
Keyword(s):  
Global Warming ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Body Shape ◽  
Developmental Stages ◽  
Swimming Performance ◽  
Later Life ◽  
Climate Change Scenarios ◽  
Population Declines ◽  
Atlantic Salmon Salmo Salar

Temperature during egg incubation and early development influences later life stages of fishes, potentially influencing survival. Throughout its distribution, Atlantic salmon (Salmo salar Linnaeus, 1758) have experienced population declines, and in view of ongoing global warming, we tested if temperature during the earliest developmental stages modified body shape and fin size when temperatures averaged 2.6 vs. 5.6 °C. This temperature difference simulates increases predicted in climate change scenarios. Based on previous studies, we hypothesized that salmon originating from eggs subjected to cold incubation temperatures would have slimmer bodies and larger pectoral and dorsal fins than salmon from eggs that experienced warmer temperatures. After hatching, the juveniles were raised for 1 year under identical temperatures, after which we measured their body shape and fin areas. We found no support for our hypothesis regarding body shape. Indeed, we found the opposite, with cold-incubated salmon having deeper bodies than warm-incubated salmon. For fin size, the pectoral fins of cold-incubated salmon were larger than for warm-incubated salmon as predicted, but there was no difference in dorsal fin size. These results suggest that global warming may lead to altered body shape and fin size, possibly affecting swimming performance, and thus raise questions about the ecological consequences of the changes.

Condition and performance of juvenile Atlantic salmon (Salmo salar): effects of rearing practices on hatchery fish and comparison with wild fish

1998 ◽  
Vol 55 (5) ◽  
pp. 1208-1219 ◽  
Author(s):  
D G McDonald ◽  
C L Milligan ◽  
W J McFarlane ◽  
S Croke ◽  
S Currie ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Swimming Performance ◽  
Anaerobic Capacity ◽  
Wild Fish ◽  
Normal Density ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon ◽  
Limited Effectiveness ◽  
And Performance

This study examined the effects of various modifications of rearing practices on hatchery-reared Atlantic salmon (Salmo salar) fingerlings and compared condition and performance of hatchery fingerlings (age 0+) and yearlings (age 1+) with those of wild-reared Atlantic salmon. Reduced fish density (and increased ration) in rearing tanks promoted increased growth and condition factor and significant changes in muscle composition, including increased muscle lipid content and glycolytic enzyme activity, specfically phosphofructokinase and lactate dehydrogenase. However, these changes had no effect on anaerobic capacity. Moreover, swimming performance was poorer in fingerlings reared at low compared with normal density. Raising the water velocity from 0 to 4 cm ·s-1 (~0.7 body length ·s-1) had overall beneficial effects, most notably increased endurance in fixed velocity sprint tests and a reduction of ion loss in an epinephrine challenge test. Increasing velocity to 9 cm ·s-1 had no further effects. Wild fingerlings were larger with better fin quality and superior anaerobic capacity and swim performance. Even larger differences were seen between hatchery-reared and wild yearlings. It is concluded that significant changes in morphology, physiology, and muscle biochemistry of juvenile Atlantic salmon can be brought about by changing hatchery rearing conditions, but these changes are of limited effectiveness in reducing the difference between hatchery-reared and wild fish.

Swimming Performance of Young Atlantic Salmon (Salmo salar) as Affected by Reduced Ambient Oxygen Concentration

1973 ◽  
Vol 30 (2) ◽  
pp. 223-227 ◽  
Author(s):  
M. N. Kutty ◽  
R. L. Saunders
Keyword(s):  
Rainbow Trout ◽  
Atlantic Salmon ◽  
Oxygen Concentration ◽  
Salmo Salar ◽  
Critical Level ◽  
Swimming Performance ◽  
Oxygen Level ◽  
Oxygen Levels ◽  
Atlantic Salmon Salmo Salar ◽  
Critical Oxygen

As oxygen concentration is lowered, a point is reached, the critical oxygen level, at which juvenile Atlantic salmon (Salmo salar) stop swimming in a tunnel respirometer. At concentrations just above the critical level, salmon frequently lose position in the upstream end of the respirometer and fall back to the downstream end while still headed into the current. There appears to be a progressive decrease in locomotor activity, indicated by reduced tailbeat frequency, on approaching the critical concentration. Swimming performance of Atlantic salmon is more highly dependent on oxygen concentration than is that of rainbow trout (Salmo gairdneri), goldfish (Carassius auratus), or Tilapia. The critical oxygen level for salmon swimming at 55 cm/sec is about 4.5 mg/liter, in comparison with 2.0 for rainbow trout, 1.7 for goldfish, and 1.0 for Tilapia. Between the minimum speed at which a salmon swims steadily and the maximum of which the fish is capable, the critical oxygen level rises with increase in swimming speed. Stoppage of swimming at the critical level is not owing to fatigue; fish resume swimming within minutes of the oxygen level being raised only slightly. The high critical oxygen levels for salmon in relation to other species including rainbow trout, another salmonid, point up the need for maintenance of stringent water quality criteria for oxygen levels in salmon rivers.

In situmeasurement of swimming performance of wild Atlantic salmon (Salmo salar) using radio transmitted electromyogram signals

1997 ◽  
Vol 10 (4) ◽  
pp. 213-219 ◽  
Author(s):  
Richard K. Booth ◽  
R. Scott McKinley ◽  
Finn Økland ◽  
Mitch M. Sisak
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Swimming Performance ◽  
Atlantic Salmon Salmo Salar

scholarly journals Association between swimming performance, cardiorespiratory morphometry, and thermal tolerance in Atlantic salmon (Salmo salar L.)

2014 ◽  
Vol 1 ◽  
Author(s):  
Katja Anttila ◽  
Sven Martin Jørgensen ◽  
Matthew T. Casselman ◽  
Gerrit Timmerhaus ◽  
Anthony P. Farrell ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Thermal Tolerance ◽  
Swimming Performance ◽  
Atlantic Salmon Salmo Salar
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