Infrared thermography cannot be used to approximate core body temperature in wild primates

McFarland, Richard; Barrett, Louise; Fuller, Andrea; Hetem, Robyn S.; Porter, Warren P.; Young, Christopher; Henzi, S. Peter

doi:10.1002/ajp.23204

Cited by 7 publications

(9 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Physical activity causes heat to be dissipated by skeletal muscles, increasing outer body surface temperature [ 34 ], and even resting positions have to be considered, because animals resting on their side on cool or moist ground will have cooler areas in the thermogram [ 97 ]. Furthermore, in horses, Jansson and colleagues did not find a correlation between maximal eye temperature and rectal temperature [ 96 ], while McFarland and colleagues confirmed that surface temperature is more predictive of environmental temperature rather than core temperature, and it should not be used as an indicator of core temperature in wild primates [ 98 ]. In mice, the orexinergic system partially controls thermogenesis, influencing sympathetic responses that may reflect inter-individual differences [ 61 ], and it is worth recounting that orexins are peptides present in various vertebrates classes [ 99 ].…”

Section: Discussionmentioning

confidence: 99%

Infrared Thermography in the Study of Animals’ Emotional Responses: A Critical Review

Travain

Valsecchi

2021

Animals

View full text Add to dashboard Cite

Whether animals have emotions was historically a long-lasting question but, today, nobody disputes that they do. However, how to assess them and how to guarantee animals their welfare have become important research topics in the last 20 years. Infrared thermography (IRT) is a method to record the electromagnetic radiation emitted by bodies. It can indirectly assess sympathetic and parasympathetic activity via the modification of temperature of different body areas, caused by different phenomena such as stress-induced hyperthermia or variation in blood flow. Compared to other emotional activation assessment methods, IRT has the advantage of being noninvasive, allowing use without the risk of influencing animals’ behavior or physiological responses. This review describes general principles of IRT functioning, as well as its applications in studies regarding emotional reactions of domestic animals, with a brief section dedicated to the experiments on wildlife; it analyzes potentialities and possible flaws, confronting the results obtained in different taxa, and discusses further opportunities for IRT in studies about animal emotions.

show abstract

Section: Discussionmentioning

confidence: 99%

Infrared Thermography in the Study of Animals’ Emotional Responses: A Critical Review

Travain

Valsecchi

2021

Animals

View full text Add to dashboard Cite

show abstract

“…5 5 This can be achieved by connecting the temperature logger to a thermocouple that is either coated in black insulation tape (see Jerem et al, 2018; Jerem et al, 2019) or embedded in an aluminum or copper plate painted with a flat black paint (see Giloh et al, 2012; McFarland et al, 2020). See also the review by Tattersall (2016) for a discussion of calibration methods and practical considerations to ensure the quality of the temperature measurements obtained from thermal images. …”

mentioning

confidence: 99%

The impacts of heat stress on animal cognition: Implications for adaptation to a changing climate

Soravia

Ashton

Thornton

et al. 2021

WIREs Climate Change

View full text Add to dashboard Cite

With global surface air temperature rising rapidly, extensive research effort has been dedicated to assessing the consequences of this change for wildlife. While impacts on the phenology, distribution, and demography of wild animal populations are well documented, the impact of increasing temperature on cognition in these populations has received relatively little attention. Cognition encompasses the mental mechanisms that allow individuals to process information from the surrounding environment, respond accordingly, and flexibly adjust behavior. Hence, it is likely to be a key factor in allowing animals to adjust adaptively to climate change. Captive studies show that heat stress can negatively affect cognitive performance not only in the short‐term but also in the long‐term, by altering cognitive development at early life stages. Field studies indicate that cognitive performance may affect survival and reproductive success. However, the link between heat stress, cognition, and fitness in wild animals has yet to be formally established. We propose a comprehensive research framework for the collection of robust empirical datasets on heat stress and cognitive performance in the wild. We then suggest how knowledge of heat stress impacts on cognitive performance could be applied to population viability models and wildlife management actions. We believe that a joint research effort encompassing the fields of thermal physiology, behavioral ecology, comparative cognition, and conservation science, is essential to provide timely mitigation measures against the potential impacts of climate change on wildlife. This article is categorized under: Climate, Ecology, and Conservation > Observed Ecological Changes

show abstract

“…In contrast, McFarland et al [ 64 ] evaluated thermal responses in different body regions of vervet monkeys ( Chlorocebus pygerythrus ), including the dorsum and face, especially the nasal region. Results revealed that although the temperature of the nasal region presented significant changes, they were not related to body temperature and thus could not be considered an effective approach to measure vasoconstriction accurately.…”

Section: Facial Windowsmentioning

confidence: 99%

“…Scientific evidence has shown that IRT has clinical and diagnostic applications with zoo animals [ 64 ]. However, effectively implementing this tool requires considering factors that can influence recordings and their interpretation.…”

Section: Limitations On the Use Of Irt In Wildlife Species Under Huma...mentioning

confidence: 99%

Thermal Imaging to Assess the Health Status in Wildlife Animals under Human Care: Limitations and Perspectives

Mota-Rojas

Pereira

Martı́nez-Burnes

et al. 2022

Animals

View full text Add to dashboard Cite

Promoting animal welfare in wildlife species under human care requires the implementation of techniques for continuously monitoring their health. Infrared thermography is a non-invasive tool that uses the radiation emitted from the skin of animals to assess their thermal state. However, there are no established thermal windows in wildlife species because factors such as the thickness or color of the skin, type/length of coat, or presence of fur can influence the readings taken to obtain objective, sensitive values. Therefore, this review aims to discuss the usefulness and application of the ocular, nasal, thoracic, abdominal, and podal anatomical regions as thermal windows for evaluating zoo animals' thermal response and health status. A literature search of the Web of Science, Science Direct, and PubMed databases was performed to identify relevant studies that used IRT with wild species as a complementary diagnostic tool. Implementing IRT in zoos or conservation centers could also serve as a method for determining and monitoring optimal habitat designs to meet the needs of specific animals. In addition, we analyze the limitations of using IRT with various wildlife species under human care to understand better the differences among animals and the factors that must be considered when using infrared thermography.

show abstract

Infrared thermography cannot be used to approximate core body temperature in wild primates

Cited by 7 publications

References 81 publications

Infrared Thermography in the Study of Animals’ Emotional Responses: A Critical Review

Infrared Thermography in the Study of Animals’ Emotional Responses: A Critical Review

The impacts of heat stress on animal cognition: Implications for adaptation to a changing climate

Thermal Imaging to Assess the Health Status in Wildlife Animals under Human Care: Limitations and Perspectives

Contact Info

Product

Resources

About