How Rainbow Trout Keep Their Hearts Working in Different Temperatures
Author Information
Author(s): Klaiman Jordan M., Fenna Andrew J., Shiels Holly A., Macri Joseph, Gillis Todd E.
Primary Institution: Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
Hypothesis
Is there an integrated response of the trout heart across multiple levels of organization to thermal acclimation?
Conclusion
The study shows that acclimation to warm and cold temperatures leads to distinct cardiac phenotypes in trout, affecting heart morphology and function.
Supporting Evidence
- Cold acclimation increased the relative ventricular mass of male trout compared to warm acclimation.
- Warm acclimation resulted in a thicker compact myocardium in male trout.
- Cold acclimation caused an increase in connective tissue content in the hearts of male trout.
Takeaway
Rainbow trout can change their heart structure and function to stay active in cold or warm water, helping them survive in different temperatures.
Methodology
The study involved acclimating rainbow trout to different temperatures and analyzing changes in heart morphology, contractile function, and protein expression.
Limitations
The study did not identify the sex of the fish used for AM Mg2+-ATPase measurements, which may affect the results.
Participant Demographics
Mixed sex rainbow trout with an average mass of 452 ± 16 g.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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