Insights into animal temperature adaptations revealed through thermal imaging

Tattersall, Glenn J.; Cadena, Viviana

doi:10.1179/136821910x12695060594165

Cited by 76 publications

(85 citation statements)

References 35 publications

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“…In many endotherms, parts of the body surface are relatively poorly covered in coat, or even entirely devoid of insulation ; these areas can be considered "thermal windows" that present a greater range of cutaneous blood flow. Known examples of these "thermal windows" include the ears, feet and nose of mammals, and the bills, feet and facial skin (comb and wattles) of birds (Autio et al, 2007;Tattersall and Cadena, 2010). A wide and accurate analysis of heat conduction and transfer models is made by McCafferty et al (2011) and Renaudeau et al (2010) showing the varied causes, mechanisms and consequences of heat stress in livestock.…”

Section: About Homeothermymentioning

confidence: 99%

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A Review of Methods to Measure Animal Body Temperature in Precision Farming

Sellier¹,

Guettier²,

Staub³

2014

AJAST

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Automation of phenotypic measurements of livestock has become a more important goal for scientists and also for farmers who need a more precise, real-time knowledge of their animals. Among physiological measures, body temperature and its variations are key indicators of the physiological health and well-being of animals. Although measuring the body temperature may seem a trivial matter, its implementation is faced with many difficulties both at biological and technological levels in a field of constant progress. Today, there are many studies reporting taking temperature measurements without restraining animals. The present report focuses on the two main approaches to temperature measurements that use direct contact or radiation sensors. Specifically, we investigated the use of thermocouples, thermistors and infrared radiation sensors. A wide literature review using one of these techniques was conducted in which different animal species, different purposes, different experimental designs, various equipments, and different devices and gold standard methods are discussed. These technologies will continue their dizzying development, leading to new communication protocols, sensors miniaturization and a more efficient management of energy. These developments will have a direct impact on the increase of reading distances and the amount of information stored. In response to the request of farmers and researchers, integrated monitoring systems are already marketed with user-friendly interfaces and softwares for complex data storage and treatments.

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Section: About Homeothermymentioning

confidence: 99%

“…This technology is more processor-and software-intensive than spot or scanning thermometers and is used for monitoring large areas. Infrared cameras allow measuring the temperature of an individual in its environment (Tattersall andCadena, 2010 Poikalainen et al, 2012).…”

Section: No-contact Measurement Mediamentioning

confidence: 99%

A Review of Methods to Measure Animal Body Temperature in Precision Farming

Sellier¹,

Guettier²,

Staub³

2014

AJAST

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show abstract

“…According to the cited authors, the animals use behavioral and ecological adaptive strategies to alleviate heat stress effects. Tattersal and Cadena (2010) carried out a comprehensive study of body temperature changes in different animals with the use of thermal imaging. They described changes in bill temperature in the Toco toucan (Ramphastos toco) subject to the bird's activity (sleep, stress).…”

Section: Thermoregulationmentioning

confidence: 99%

Infrared thermal imaging in studies of wild animals

et al. 2012

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Thermography is an imaging method which registers infrared waves in the electromagnetic spectrum that are emitted by all objects on the Earth. The state and properties of the studied objects and organisms can be evaluated by analyzing images of temperature distribution on their surface. Thermography has numerous practical applications, including in construction, industry, and the military and civil services. In natural sciences, thermal imaging techniques support safe and non-invasive measurements and the acquisition of results that cannot be obtained by any other method. Infrared thermography also creates a wide range of applications for human and veterinary medicine, ecology, zoology, and other natural sciences. Thermal imaging equipment is used to detect injuries, inflammations, and infectious diseases to control reproduction (detection of estrus and pregnancy, determination of male fertility) and lactation processes. The discussed method is applied to investigate thermoregulation in animals, to analyze the effect of environmental factors on animal behavior, to localize individuals and their habitats, and to determine the size of wildlife populations. Despite a wide range of practical applications, thermal imaging has a number of limitations which should be taken into account in studies that rely on infrared thermography techniques.

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“…Peripheral blood fl ow plays an important role in regulating body temperature. The amount of peripheral blood fl ow produces thermal changes in the temperature at the surface of the body (Tattersall and Cadena, 2010). Therefore, the surface temperature of horses may constitute an indicator of change in thermoregulation (Jodkowska et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

A decision-tree-based model for evaluating the thermal comfort of horses

Maia

Oliveira

Moura

et al. 2013

Sci. agric. (Piracicaba, Braz.)

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Thermal comfort is of great importance in preserving body temperature homeostasis during thermal stress conditions. Although the thermal comfort of horses has been widely studied, there is no report of its relationship with surface temperature (T S ). This study aimed to assess the potential of data mining techniques as a tool to associate surface temperature with thermal comfort of horses. T S was obtained using infrared thermography image processing.Physiological and environmental variables were used to defi ne the predicted class, which classifi ed thermal comfort as "comfort" and "discomfort". The variables of armpit, croup, breast and groin T S of horses and the predicted classes were then subjected to a machine learning process. All variables in the dataset were considered relevant for the classifi cation problem and the decision-tree model yielded an accuracy rate of 74 %. The feature selection methods used to reduce computational cost and simplify predictive learning decreased model accuracy to 70 %; however, the model became simpler with easily interpretable rules. For both these selection methods and for the classifi cation using all attributes, armpit and breast T S had a higher power rating for predicting thermal comfort. Data mining techniques show promise in the discovery of new variables associated with the thermal comfort of horses.

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Insights into animal temperature adaptations revealed through thermal imaging

Cited by 76 publications

References 35 publications

A Review of Methods to Measure Animal Body Temperature in Precision Farming

A Review of Methods to Measure Animal Body Temperature in Precision Farming

Infrared thermal imaging in studies of wild animals

A decision-tree-based model for evaluating the thermal comfort of horses

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