scholarly journals The effects of acclimation to reversed seasonal temperatures on the swimming performance of adult brown trout Salmo trutta

2005 ◽  
Vol 208 (14) ◽  
pp. 2683-2692 ◽  
Author(s):  
N. Day
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Swimming Performance ◽  
Brown Trout Salmo Trutta

Breaking the speed limit — comparative sprinting performance of brook trout (Salvelinus fontinalis) and brown trout (Salmo trutta)

2013 ◽  
Vol 70 (2) ◽  
pp. 280-293 ◽  
Author(s):  
Theodore Castro-Santos ◽  
Francisco Javier Sanz-Ronda ◽  
Jorge Ruiz-Legazpi
Keyword(s):  
Brown Trout ◽  
Brook Trout ◽  
Salmo Trutta ◽  
Salvelinus Fontinalis ◽  
Swimming Performance ◽  
Physiological Limits ◽  
Brown Trout Salmo Trutta ◽  
Free Ranging ◽  
The Relationship ◽  
Sprint Swimming

Sprinting behavior of free-ranging fish has long been thought to exceed that of captive fish. Here we present data from wild-caught brook trout (Salvelinus fontinalis) and brown trout (Salmo trutta), volitionally entering and sprinting against high-velocity flows in an open-channel flume. Performance of the two species was nearly identical, with the species attaining absolute speeds > 25 body lengths·s−1. These speeds far exceed previously published observations for any salmonid species and contribute to the mounting evidence that commonly accepted estimates of swimming performance are low. Brook trout demonstrated two distinct modes in the relationship between swim speed and fatigue time, similar to the shift from prolonged to sprint mode described by other authors, but in this case occurring at speeds > 19 body lengths·s−1. This is the first demonstration of multiple modes of sprint swimming at such high swim speeds. Neither species optimized for distance maximization, however, indicating that physiological limits alone are poor predictors of swimming performance. By combining distributions of volitional swim speeds with endurance, we were able to account for >80% of the variation in distance traversed by both species.

scholarly journals Extreme temperature combined with hypoxia, affects swimming performance in brown trout (Salmo trutta)

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Robert L Nudds ◽  
Karlina Ozolina ◽  
Miriam Fenkes ◽  
Oliver H Wearing ◽  
Holly A Shiels
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Swimming Speed ◽  
Salmo Trutta ◽  
River Flow ◽  
Swimming Performance ◽  
Extreme Temperature ◽  
Saturation Level ◽  
Brown Trout Salmo Trutta ◽  
Tail Beat

Abstract Climate change is predicted to impact freshwater aquatic environments through changes to water temperature (Twater), river flow and eutrophication. Riverine habitats contain many economically and ecologically important fishes. One such group is the migratory salmonids, which are sensitive to warm Twater and low O2 (hypoxia). While several studies have investigated the independent effects of Twater and hypoxia on fish physiology, the combined effects of these stressors is less well known. Furthermore, no study has investigated the effects of Twater and O2 saturation levels within the range currently experienced by a salmonid species. Thus, the aim of this study was to investigate the simultaneous effects of Twater and O2 saturation level on the energetics and kinematics of steady-state swimming in brown trout, Salmo trutta. No effect of O2 saturation level (70 and 100% air saturation) on tail-beat kinematics was detected. Conversely, Twater (10, 14, 18 and 22°C) did affect tail-beat kinematics, but a trade-off between frequency (ftail) and amplitude (A, maximum tail excursion) maintained the Strouhal number (St = ftail• A/U, where U is swimming speed) within the theoretically most mechanically efficient range. Swimming oxygen consumption rate (${\dot{M}}_{{\mathsf{O}}_{\mathsf{2}}}$) and cost of transport increased with both U and Twater. The only effect of O2 saturation level was observed at the highest Twater (22°C) and fastest swimming speed (two speeds were used—0.6 and 0.8 m s−1). As the extremes of this study are consistent with current summer conditions in parts of UK waterways, our findings may indicate that S. trutta will be negatively impacted by the increased Twater and reduced O2 levels likely presented by anthropogenic climate change.

scholarly journals Kinematics and energetics of swimming performance during acute warming in brown trout Salmo trutta

2015 ◽  
Vol 88 (1) ◽  
pp. 403-417 ◽  
Author(s):  
J. M. D. Lea ◽  
A. N. Keen ◽  
R. L. Nudds ◽  
H. A. Shiels
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Swimming Performance ◽  
Brown Trout Salmo Trutta
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