in Ecology Ruedi Nager, Dominic McCafferty, Dorothy McKeegan, - - PowerPoint PPT Presentation

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in Ecology Ruedi Nager, Dominic McCafferty, Dorothy McKeegan, - - PowerPoint PPT Presentation

Apr 27, 2023 133 likes •313 views

Applications & Opportunities of Thermal Imaging in Ecology Ruedi Nager, Dominic McCafferty, Dorothy McKeegan, Katherine Herborn , Paul Jerem Thermal Ecology Group, IBAHCM, University of Glasgow IRT in Animal Research Thermal Ecology Group

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Applications & Opportunities of Thermal Imaging in Ecology

Ruedi Nager, Dominic McCafferty, Dorothy McKeegan, Katherine Herborn , Paul Jerem Thermal Ecology Group, IBAHCM, University of Glasgow

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IRT in Animal Research

Surveying Wildlife Energy Expenditure Examine Injuries Assessment of Stress

http://www.gla.ac.uk/researchinstitutes/bahcm/research/sigs/thermalecologygroup

Thermal Ecology Group

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Surveying Wildlife Counting Animals

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Presence of nesting an elusive nocturnal burrow nester, the Manx Shearwater, on Ailsa Craig?

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Assessing Physiological State

Energy Expenditure Assessment of Stress

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Body Surface temperature

Environment (sun, wind) will change local peripheral temperature Physiology increased metabolic rate altered blood flow

Temperature at any anatomical region = product of metabolic heat production, blood flow within that region, and heat exchange with environment from physical processes. This is going to vary across the body surface

What does Thermal Imaging measure?

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Handling Stress of Wild Blue Tits

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Temperature Response to Handling

Jerem et al. 2015 Journal of Visualised Experiments e53184

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Proportionality of Response

Cradled Side

V

Does a more intense stressor trigger a different temperature response?

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Proportionality of Response

Herborn et al. 2015 Physiology & Behaviour 152,225

Handling of different stressor intensity

It is graded response, not just response/no response

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Baseline Temperature

Birds with lower body surface temperature were in poorer body condition

  • That could be because birds in poorer body condition reduce their

energy expenditure and produce less heat

  • Alternatively birds in poor body condition could be chronicallt

stressed which reduces surface temperature as for the birds in the handling stress.

  • The latter scenario is supported by birds with lower body surface

temperature having higher levels of corticosterone circulating in their plasma

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Examine Injuries Examine Injuries

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Examine Injuries

Patterson et al 2010 Marine Mammal Science 27, 295-305 78, 1477

Marking of Marine Mammals

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Examine Injuries

Some birds had one leg warmer than the other leg

  • This was not affected in birds that wore the standard

metal and small colour rings

  • But the data suggests legs with heavier rings (that

carry PIT tags are more likely warmer than the leg with just a standard small ring

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Examine Injuries

The herring gull on the right wears a harness, and there are no heat leaks that would indicate that the harness has damaged to plumage.

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  • Summary

IRT Research in Animals

  • Might allow monitoring animals that are difficult to assess
  • Changes in surface temperature can pick up intensity of acute stress
  • Baseline surface temperature may reflect chronic stress
  • Allows detecting remotely the effects of injuries