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Increased Body Temperature

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A body temperature above 38°C (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.

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Updated: Jun 20, 2026

High-Throughput Assays of Critical Thermal Limits in Insects

High-Throughput Assays of Critical Thermal Limits in Insects

Published on: June 15, 2020

Hyperthermic aphids: insights into behaviour and mortality.

Steaphan P Hazell¹, Bolette Palle Neve, Constantinos Groutides

¹School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

Journal of Insect Physiology

|September 10, 2009

Summary

This summary is machine-generated.

This study investigated aphid thermal tolerance to heat waves. Myzus persicae showed the greatest high-temperature tolerance, suggesting resilience to warmer summers.

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Published on: February 2, 2016

Area of Science:

Ecology
Climate Change Biology
Insect Physiology

Background:

Warming impacts on aphid populations are known for winter, but summer heat effects are unclear.
Aphids face varied climate change impacts, from arctic threats to glasshouse benefits.
Thermal tolerance is crucial for aphid survival during extreme heat events.

Purpose of the Study:

To analyze the thermal ecology of three aphid species under heat stress.
To determine the impact of acclimation temperature on thermal tolerance.
To assess the potential of different aphid species to cope with rising temperatures.

Main Methods:

Measured upper lethal limits (ULT50) and heat coma temperatures at different rearing temperatures (15°C, 20°C).
Assessed heat coma and CTmax after rearing at 10°C and 25°C for one and three generations.
Determined optimum development temperatures for each species.

Main Results:

Heat coma reliably indicates fatal heat stress.
Acclimation increased CTmax with rearing temperature for all species.
Myzus persicae exhibited the greatest tolerance to high temperatures, with non-linear heat coma responses to acclimation.

Conclusions:

Myzus persicae is best adapted to high temperatures among the studied species.
Acclimation influences thermal tolerance, but the response varies between species.
Understanding aphid thermal ecology is vital for predicting pest dynamics under climate change.