This review is focused on the questions of why fish exhibit heat failure at thermal extremes
and which physiological mechanisms determine the acute upper thermal tolerance. We …

Critical thermal maxima methodology (CTM) has been used to infer acute upper thermal
tolerance in fishes since the 1950s, yet its ecological relevance remains debated. In this …

Temperature-induced limitations on the capacity of the cardiorespiratory system to transport
oxygen from the environment to the tissues, manifested as a reduced aerobic scope …

Ectothermic species like fishes differ greatly in the thermal ranges they tolerate; some
eurythermal species may encounter temperature ranges in excess of 25° C, whereas …

Environmental variability in aquatic ecosystems makes the study of ectotherms complex and
challenging. Physiologists have historically overcome this hurdle in the laboratory by using …

The frequency of extreme thermal events in temperate freshwater systems is expected to
increase alongside global surface temperature. The Miramichi River, located in eastern …

Long-term temperature shifts associated with seasonal variability are common in temperate
regions. However, these natural shifts could place significant strain on thermal stress …

Heatwaves are increasing in frequency and severity, posing a significant threat to organisms
globally. In aquatic environments heatwaves are often associated with low environmental …

Although thermal performance is widely recognised to be pivotal in determining species'
distributions, assessment of this performance is often based on laboratory-acclimated …

The high intertidal zone is home to an incredible variety of marine animals, as it offers an
escape from low intertidal/subtidal predation and competition, among other advantages …