... crit ; the temperature above which heart rate abruptly declines) and flatline temperature ( T flat ; the temperature where heart rate ceases). Despite the wide use of CTP tests, it remains largely unknown how T crit and T flat change within a single individual after heat acclimation, and whether...

... Flatline temperature Heart rate Heat stress Intertidal zone Mollusk Mytilus californianus Physiological plasticity Thermal tolerance Physiological plasticity potentially allows animals to respond quickly to, and mount defenses against, environmental stressors ( Burggren, 2018 ; Gotcha et...

...) precipitously declines, and (2) flatline temperature (FLT) where HR reaches zero. Mussels were heated in air at slow, moderate and fast rates, and HR was measured via an infrared sensor affixed to the shell. Faster heating rates significantly increased T crit in high- but not low-zone mussels, and T crit...