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<a href="http://doi.org/10.1016/j.jtherbio.2016.11.005" target="_blank" rel="noreferrer noopener">http://doi.org/10.1016/j.jtherbio.2016.11.005</a>
Pages
49–57
Volume
63
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Title
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An assessment of skin temperature gradients in a tropical primate using infrared thermography and subcutaneous implants.
Publisher
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Journal of thermal biology
Date
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2017
2017-01
Subject
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*Core-shell model; *Heat loss; *Howling monkey; *Skin Temperature; *Subcutaneous temperature; *Thermal windows; *Thermoregulation; *Tropical Climate; Acclimatization; Alouatta/*physiology; Animals; Infrared Rays; Thermography/instrumentation/*methods; Thermometers
Creator
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Thompson Cynthia L; Scheidel Caleb; Glander Kenneth E; Williams Susan H; Vinyard Christopher J
Description
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Infrared thermography has become a useful tool to assess surface temperatures of animals for thermoregulatory research. However, surface temperatures are an endpoint along the body's core-shell temperature gradient. Skin and fur are the peripheral tissues most exposed to ambient thermal conditions and are known to serve as thermosensors that initiate thermoregulatory responses. Yet relatively little is known about how surface temperatures of wild mammals measured by infrared thermography relate to subcutaneous temperatures. Moreover, this relationship may differ with the degree that fur covers the body. To assess the relationship between temperatures and temperature gradients in peripheral tissues between furred and bare areas, we collected data from wild mantled howling monkeys (Alouatta palliata) in Costa Rica. We used infrared thermography to measure surface temperatures of the furred dorsum and bare facial areas of the body, recorded concurrent subcutaneous temperatures in the dorsum, and measured ambient thermal conditions via a weather station. Temperature gradients through cutaneous tissues (subcutaneous-surface temperature) and surface temperature gradients (surface-ambient temperature) were calculated. Our results indicate that there are differences in temperatures and temperature gradients in furred versus bare areas of mantled howlers. Under natural thermal conditions experienced by wild animals, the bare facial areas were warmer than temperatures in the furred dorsum, and cutaneous temperature gradients in the face were more variable than the dorsum, consistent with these bare areas acting as thermal windows. Cutaneous temperature gradients in the dorsum were more closely linked to subcutaneous temperatures, while facial temperature gradients were more heavily influenced by ambient conditions. These findings indicate that despite the insulative properties of fur, for mantled howling monkeys surface temperatures of furred areas still demonstrate a relationship with subcutaneous temperatures. Given that most mammals possess dense fur, this provides insight for using infrared imaging in thermoregulatory studies of wild animals lacking bare skin.
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<a href="http://doi.org/10.1016/j.jtherbio.2016.11.005" target="_blank" rel="noreferrer noopener">10.1016/j.jtherbio.2016.11.005</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Core-shell model
*Heat loss
*Howling monkey
*Skin Temperature
*Subcutaneous temperature
*Thermal windows
*thermoregulation
*Tropical Climate
2017
Acclimatization
Alouatta/*physiology
Animals
Glander Kenneth E
Infrared Rays
Journal of thermal biology
Scheidel Caleb
Thermography/instrumentation/*methods
Thermometers
Thompson Cynthia L
Vinyard Christopher J
Williams Susan H