Insect Thermal Tolerance
Insect Thermal Tolerance - Related Videos
07:23
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
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Cited by 41 •
2014
We describe a protocol to examine the development of opioid-induced hyperalgesia and tolerance in mice. Based on the measurement of thermal and mechanical nociceptive responses of naïve and morphine-treated animals, it allows to quantify the increase in pain sensitivity (hyperalgesia) and decrease in analgesia (tolerance) associated with chronic opiate administration.
01:47
Osmoregulation in Insects
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2019
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area. Malpighian tubules extend from the digestive tract, typically the area between the midgut and hindgut, into the hemolymph—a mixture of blood and interstitial fluid found in insects and other arthropods, as well as most...
06:58
High-Throughput Assays of Critical Thermal Limits in Insects
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Cited by 9 •
2020
Thermal limits can predict the environments organisms tolerate, which is valuable information in the face of rapid climate change. Described here are high-throughput protocols to assess critical thermal minima and heat knockdown time in insects. Both protocols maximize the throughput and minimize the cost of the assays.
19:14
Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring
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Cited by 4 •
2014
We present a novel surgical procedure to implant electrodes in Manduca sexta during its early metamorphic stages. This technique allows mechanically stable and electrically reliable coupling with the neuromuscular tissue to study flight neurophysiology dynamics. We also present a novel magnetic levitation platform for tethered studies of insect yaw.
01:17
Salinity Tolerance of Alishewanella Species Isolated from Seawall Muddy Water
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2025
Begin with a culture of Alishewanella, a Gram-negative, salt-tolerant bacterium.Next, streak the culture onto agar plates containing increasing concentrations of sodium chloride to simulate varying levels of saline stress.Overlay each plate with a layer of unsolidified medium to prevent oxygen diffusion and maintain the culture in an oxygen-limited environment.Seal and incubate the plates at an optimum temperature to support bacterial growth.During incubation, the bacterium exhibits varying...
FAQs
Acclimation can improve or alter thermal performance through physiological adjustments made in response to environmental conditions. These adjustments include producing heat-shock proteins, which are associated with responses to thermal stress, and modifying membrane stability. Such changes may influence how effectively an insect functions when temperatures shift, helping researchers interpret variation among individuals exposed to different thermal histories.
Critical thermal minimum and maximum identify temperatures at which movement or other functions become disrupted. They therefore provide boundaries for assessing performance under thermal stress rather than simply recording whether an insect survives. Comparing these limits among insects can help connect temperature exposure with activity, distribution, seasonal behavior, and vulnerability to environmental change.
Membrane stability is one physiological feature that can change during acclimation and influence thermal performance. Because membranes help maintain cellular function, temperature-related changes in their stability provide a mechanism linking environmental conditions with an insect’s ability to function. Including this response alongside heat-shock protein production gives thermal-tolerance studies a broader physiological basis.
Researchers commonly evaluate limits using critical thermal minimum and maximum measures. These assessments focus on the temperatures where movement or function becomes disrupted, providing standardized indicators of lower and upper performance boundaries. The resulting measurements can then be related to acclimation, seasonal activity, distribution patterns, or projected responses to changing and increasingly variable temperatures.
Thermal-tolerance measurements help researchers estimate how insect populations may respond as temperatures become warmer or more variable. Physiological adjustments such as heat-shock protein production and changes in membrane stability add context to these predictions. The findings can clarify which populations may be more vulnerable, while also improving understanding of future changes in insect distributions and seasonal activity.
Thermal-tolerance research informs agricultural management by helping explain conditions associated with pest outbreaks and changes in pest activity. In conservation, the same information supports assessments of biodiversity vulnerability under shifting temperature regimes. More broadly, linking thermal limits with ecology and evolution helps researchers evaluate how insect populations may persist, redistribute, or become threatened as environmental temperatures change.