scholarly journals Thermal Imaging of House Sparrow Nestlings: The Effect of Begging Behavior and Nestling Rank

The Condor ◽  
2002 ◽  
Vol 104 (4) ◽  
pp. 837-842 ◽  
Author(s):  
Oded Ovadia ◽  
Berry Pinshow ◽  
Arnon Lotem
Keyword(s):  
Body Surface ◽  
Heat Production ◽  
Thermal Imaging ◽  
Infrared Imaging ◽  
House Sparrow ◽  
Passer Domesticus ◽  
Energetic Cost ◽  
Mixed Effect ◽  
Begging Behavior ◽  
Body Surface Temperature

Abstract We used infrared imaging to test whether the energetic cost of begging is observable in changes in body surface temperature (Ts) of young House Sparrow nestlings (Passer domesticus), and whether Ts is affected by nestling rank. Begging had a mixed effect on Ts, increasing it slightly at first, but decreasing it when hungry nestlings begged more vigorously. This mixed effect may result from heat production being quickly offset when begging posture and movement enhance heat loss through the skin, and suggests that the energetic cost of begging cannot be inferred from thermal imaging. The analysis of Ts in relation to nestling rank showed that although low-ranked nestlings maintained lower Ts than their larger siblings, their Ts was higher than expected for their body mass. This suggests that nestlings of a lower rank may gain heat from their larger, more developed nestmates. Imágenes Térmicas de Pichones de Passer domesticus: Efectos del Comportamiento de Solicitar y del Rango en la Nidada Resumen. Utilizamos imágenes infrarrojas de pichones jóvenes de Passer domesticus para probar si es posible observar el costo energético de solicitar en los cambios de la temperatura de la superficie del cuerpo (Ts), y si Ts está afectada por el rango del pichón en la nidada. El comportamiento de solicitar tuvo un efecto mixto sobre Ts, aumentándola levemente al principio, pero disminuyéndola cuando los polluelos hambrientos solicitaron con mayor vigorosidad. Este efecto mixto puede deberse a que la producción de calor es rápidamente contrarestada por una pérdida de calor a través de la piel dada por la postura de solicitar y el movimiento, sugiriendo que no es posible inferir el costo energético de solicitar a partir de técnicas de imagen térmica. El análisis de Ts en relación al rango de los pichones en la nidada mostró que a pesar de que los pichones de bajo rango mantuvieron Ts más bajas que sus hermanos de mayor tamaño, la Ts de los pichones más pequeños fue más alta de lo esperado de acuerdo a su tamaño corporal. Esto sugiere que los pichones de menor rango pueden ganar calor de sus compañeros de nido más desarrollados y de mayor tamaño.

scholarly journals Parameters sensitivity assessment and heat source localization using infrared imaging techniques

2021 ◽  
Author(s):  
Maryam Rastgar-Jazi ◽  
Farah Mohammadi
Keyword(s):  
Surface Temperature ◽  
Source Localization ◽  
Body Surface ◽  
Infrared Imaging ◽  
Imaging Techniques ◽  
Ir Camera ◽  
Non Invasive ◽  
Metabolism Rate ◽  
Sensitivity Assessment ◽  
Body Surface Temperature

Background At present, infrared (IR) imaging is used both as a non-invasive and a non-ionizing technology. Using an IR camera, it is possible to measure body surface temperature in order to detect tumors and malignant cells. Tumors have a high amount of vasculature and an enhanced metabolism rate, which may result in an increase in body surface temperature by several degrees above its normal level.

scholarly journals Age dependence of thermal imaging analysis of body surface temperature in women after cryostimulation

2013 ◽  
Vol 14 (4) ◽  
Author(s):  
Agnieszka Dębiec-Bąk ◽  
Katarzyna Gruszka ◽  
Krzysztof A. Sobiech ◽  
Anna Skrzek
Keyword(s):  
Surface Temperature ◽  
Body Surface ◽  
Thermal Imaging ◽  
Imaging Analysis ◽  
Age Dependence ◽  
Body Surface Temperature

scholarly journals The Effect of Dry Carbon Dioxide Bathing on Peripheral Blood Circulation Measured by Thermal Imaging among Patients with Risk Factors of PAD

2021 ◽  
Vol 18 (4) ◽  
pp. 1490
Author(s):  
Hanna Zbroja ◽  
Mateusz Kowalski ◽  
Anna Lubkowska
Keyword(s):  
Risk Factors ◽  
Carbon Dioxide ◽  
Blood Flow ◽  
Surface Temperature ◽  
Body Surface ◽  
Thermal Imaging ◽  
Blood Circulation ◽  
The Body ◽  
Body Surface Temperature ◽  
Peripheral Blood Circulation

Peripheral artery disease (PAD) is becoming a serious health problem of present times. It appears crucial to explore therapies that might help to restore blood flow or increase tissue oxygenation. The most effective methods of detecting early-stage changes in blood circulation in the extremities need to be identified. The aim of this study was to identify the effect of carbon dioxide (CO2) bathing on peripheral blood circulation measured by thermal imaging among patients with risk factors of PAD and ankle–brachial index (ABI) in the normal range or ABI indicating some or moderate arterial disease (ABI > 0.5). The correlation between surface temperature change and PAD-relevant characteristics was also examined. Forty-six patients who were over 65 years old who had a minimum of two additional PAD risk factors were recruited. A series of ten dry CO2 baths was performed. Thermal images were taken before and after the intervention. The CO2 therapy caused a significant change in the body surface temperature of many body areas. Numerous moderate correlations between temperature change and health-related characteristics were identified. Therefore, patients with PAD risk factors could benefit from CO2 therapy. Improvements in blood flow change the body surface temperature, and these changes could be successfully detected by thermal imaging.

High-Resolution Infrared Body Surface Temperature and Self-Perceived Warmth Distribution in Adolescent Anorexia Nervosa Patients

2019 ◽  
Vol 33 (3) ◽  
pp. 139-147 ◽  
Author(s):  
Cara M. Belizer ◽  
Jan Vagedes
Keyword(s):  
Anorexia Nervosa ◽  
High Resolution ◽  
Surface Temperature ◽  
Body Surface ◽  
Thermal Imaging ◽  
The Body ◽  
Healthy Controls ◽  
Treatment Programme ◽  
Body Surface Temperature ◽  
And Control

Abstract. Anorexia nervosa (AN) is associated with thermoregulatory disturbances such as hypothermia. However, few studies have explored body warmth in AN patients. In this study, we assessed the body surface temperature distribution in adolescent AN patients using high-resolution infrared thermal imaging and through a patient questionnaire, and explored how this differed between intervention and control group and length of treatment. Adolescent AN patients admitted to a multimodal inpatient treatment programme based on an integrative perspective were assessed at three time-points: admission (t1), 6 weeks post-admission (t2), and 3 months after t2 (t3). Healthy control participants were assessed once at baseline. In both groups we assessed participants’ surface temperature and the perception of warmth, using thermal imaging and a questionnaire, in the face, hands, abdomen, and feet. We recruited 40 AN patients and 40 healthy controls, who were admitted to the treatment programme for an average of 70 days ( SD = 24.07). The AN patients were significantly colder in all chosen body domains, except the abdomen area, at t1 compared to healthy controls at baseline. The questionnaire findings supported this result. Differences between the intervention and control groups noted at t1 were significantly reduced by t2 and t3. Our findings suggest that abnormities in the body warmth distribution of AN patients are reversible after having received an AN-specific treatment. Reducing the loss of warmth could improve therapeutic outcomes in AN patients and be a predictor of recovery, and should be investigated in further studies.

scholarly journals Parameters sensitivity assessment and heat source localization using infrared imaging techniques

2021 ◽  
Author(s):  
Maryam Rastgar-Jazi ◽  
Farah Mohammadi
Keyword(s):  
Surface Temperature ◽  
Source Localization ◽  
Body Surface ◽  
Infrared Imaging ◽  
Imaging Techniques ◽  
Ir Camera ◽  
Non Invasive ◽  
Metabolism Rate ◽  
Sensitivity Assessment ◽  
Body Surface Temperature

Background At present, infrared (IR) imaging is used both as a non-invasive and a non-ionizing technology. Using an IR camera, it is possible to measure body surface temperature in order to detect tumors and malignant cells. Tumors have a high amount of vasculature and an enhanced metabolism rate, which may result in an increase in body surface temperature by several degrees above its normal level.

scholarly journals Thermoregulatory costs in molting Antarctic Weddell seals: impacts of physiological and environmental conditions

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Skyla M Walcott ◽  
Amy L Kirkham ◽  
Jennifer M Burns
Keyword(s):  
Ambient Temperature ◽  
Environmental Conditions ◽  
Infrared Imaging ◽  
Conservation Strategies ◽  
Energetic Cost ◽  
Ambient Conditions ◽  
Mixed Effect ◽  
Small Surface ◽  
Weddell Seals ◽  
Imaging Results

Abstract For polar marine mammals, the energetic cost of thermoregulation depends on ambient conditions in the highly variable surrounding environment. Heat conservation strategies used by pinnipeds to reduce total heat loss include small surface area to volume ratios, the ability to limit perfusion and thick subcutaneous blubber layers. There are limits to how cool the skin surface may remain without compromising function, especially during the annual pelage molt, when hair and skin are replaced. To determine if actively molting seals incur higher thermoregulatory costs, surface temperature (ST) and heat flux (HF) were measured in 93 adult female Weddell seals (Leptonychotes weddellii) both prior to and during the active molting period using direct sensors and infrared imaging. Linear mixed-effect models revealed that ST increased significantly with increased ambient temperature and decreased wind speed (contributing 44.6 and 41.7% of the attributed variance, respectively). Seal STs were not impacted by molt status, but were maintained at 11.2 ± 0.3°C warmer than the ambient temperature. Infrared imaging results averaged 15.1 ± 1.4°C warmer than direct ST measurements. In contrast, HF was significantly higher in seals in early molting stages compared to the pre-molt season ( P < 0.001) and molt status accounted for 66.5% of the variance in HF. Thermoregulatory costs calculated from estimated basal metabolic rate and measured HF were more than double for molting seals as compared to those in pre-molt. This suggests that perfusion is increased during molt to support follicle development, despite the increased energetic costs associated with higher HF rates. Because ST, HF and thermoregulatory costs are strongly influenced by ambient conditions, molt timing is likely under selective pressure to occur during the warmest period of the year. Shifts in environmental conditions that delay molt phenology or increase HF rates could negatively impact seal populations by further increasing thermoregulatory costs.

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