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Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates

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Published on: April 4, 2020

Short-term acclimation dynamics in a coldwater fish.

Erin M C Stewart¹, Vince R Frasca², Chris C Wilson³

¹Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, K9J 5G7, Canada.

Journal of Thermal Biology

|February 16, 2023

Summary

This summary is machine-generated.

Fish thermal tolerance, measured as critical thermal maximum (CT_max), continues to acclimate for at least 30 days. Acclimation temperature and duration significantly impact CT_max, affecting comparisons across studies.

Keywords:

Climate change Incipient lethal temperature LT50 Plasticity Salmonid Thermal tolerance Thermal variation

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Swimming Performance Assessment in Fishes

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Published on: May 20, 2011

Area of Science:

Environmental physiology
Aquatic biology
Ecology

Background:

Critical thermal maximum (CT_max) is a key metric for thermal tolerance in ectotherms.
Acclimation significantly influences CT_max, leading to variation in studies.
Quantifying acclimation rates and temperature/duration effects is crucial for accurate comparisons.

Purpose of the Study:

To investigate the effects of acclimation temperature and duration on brook trout CT_max.
To determine how temperature difference and acclimation time influence thermal tolerance.
To provide context for interpreting CT_max data in thermal biology.

Main Methods:

Brook trout (Salvelinus fontinalis) were subjected to varying acclimation temperatures and durations (1-30 days) under laboratory conditions.
CT_max was measured repeatedly to assess the rate and extent of acclimation.
Ecologically relevant temperature ranges were utilized.

Main Results:

Both acclimation temperature and duration significantly affected CT_max in brook trout.
Higher temperatures and longer acclimation periods led to increased CT_max.
Full acclimation, indicated by a plateau in CT_max, was not achieved by day 30.

Conclusions:

Brook trout CT_max can continue to acclimate for at least 30 days.
Acclimation effects must be considered in thermal tolerance studies for accurate species comparisons.
Detailed acclimation data can reduce uncertainty and improve conservation planning.