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Josef Virens, Alison Cree
Thermochron iButtons are commonly used by thermal biologists to continuously measure body temperature from animals. However, if unmodified, these devices are of a size that limits their use with very small animals. To allow iButtons to be used to study smaller species, methods have been previously described to miniaturise them by 61%. We present a method to reduce iButton mass by a further 71%. The modified devices have a shorter battery life, but the minimum size of vertebrates able to carry the devices is reduced from 28...
April 19, 2018: Journal of Experimental Biology
Edward J Raynor, Larkin A Powell, Walter H Schacht
Better understanding animal ecology in terms of thermal habitat use has become a focus of ecological studies, in large part due to the predicted temperature increases associated with global climate change. To further our knowledge on how ground-nesting endotherms respond to thermal landscapes, we examined the thermal ecology of Sharp-tailed Grouse (Tympanuchus phasianellus) during the nesting period. We measured site-specific iButton temperatures (TiB) and vegetation characteristics at nest sites, nearby random sites, and landscape sites to assess thermal patterns at scales relevant to nesting birds...
2018: PloS One
Adam J Terando, Elsa Youngsteadt, Emily K Meineke, Sara G Prado
In light of global climate change, ecological studies increasingly address effects of temperature on organisms and ecosystems. To measure air temperature at biologically relevant scales in the field, ecologists often use small, portable temperature sensors. Sensors must be shielded from solar radiation to provide accurate temperature measurements, but our review of 18 years of ecological literature indicates that shielding practices vary across studies (when reported at all), and that ecologists often invent and construct ad hoc radiation shields without testing their efficacy...
December 2017: Ecology and Evolution
Kerri T Vierling, Teresa J Lorenz, Patrick Cunningham, Kelsi Potterf
Tree cavities provide critical roosting and breeding sites for multiple species, and thermal environments in these cavities are important to understand. Our objectives were to (1) describe thermal characteristics in cavities between June 3 and August 9, 2014, and (2) investigate the environmental factors that influence cavity temperatures. We placed iButtons in 84 different cavities in ponderosa pine (Pinus ponderosa) forests in central Washington, and took hourly measurements for at least 8 days in each cavity...
November 5, 2017: International Journal of Biometeorology
G C Miranda-de la Lama, M Rodríguez-Palomares, R G Cruz-Monterrosa, A A Rayas-Amor, R S B Pinheiro, F M Galindo, M Villarroel
Livestock transport exposes animals to a range of potential stressors that may compromise their welfare and final product quality, and those effects typically increase with the distance travelled. In North America, producers often use pot-belly vehicles for long hauls but little is known about their suitability for transporting lambs. We followed two long-distance trips using pot-belly trailers carrying 500 lambs (each) from Northern to Central Mexico in winter, to measure possible effects on animal welfare and meat quality...
February 2018: Tropical Animal Health and Production
Luis J Corona, Grant H Simmons, Jeff A Nessler, Sean C Newcomer
The purpose of this study was to investigate skin temperatures across surfers' bodies while wearing a wetsuit during recreational surfing. Forty-six male recreational surfers participated in this study. Participants were instrumented with eight wireless iButton thermal sensors for the measurement of skin temperature, a Polar RCX5 heart rate monitor, and a 2mm full wetsuit. Following instrumentation, participants were instructed to engage in recreational surfing activities as normal. Significant differences (p<0...
September 29, 2017: Ergonomics
Tae-Won Jang, Hyunjoo Kim, Suk-Hoon Kang, Sang-Hyo Choo, In-Seok Lee, Kyung-Hwa Choi
Background: Human body temperature varies with circadian rhythm. To determine the effect of shift work on the circadian rhythm of the distal-skin temperature, wrist temperatures were measured. Methods: Wrist-skin temperatures were measured by an iButton(®) Temperature Logger. It was measured every 3 min for two and eight consecutive working days in the day and shift workers, respectively. Mesor, amplitude, and acrophase were measured by Cosinor analysis. Results: The shift-worker amplitude dropped significantly as the night shift progressed (0...
September 24, 2017: International Journal of Environmental Research and Public Health
Borja Martinez-Tellez, Guillermo Sanchez-Delgado, Francisco M Acosta, Juan M A Alcantara, Mariëtte R Boon, Patrick C N Rensen, Jonatan R Ruiz
Cold exposure is necessary to activate human brown adipose tissue (BAT), resulting in heat production. Skin temperature is an indirect measure to monitor the body's reaction to cold. The aim of this research was to study whether the most used equations to estimate parameters of skin temperature in BAT-human studies measure the same values of temperature in young lean men (n = 11: 23.4 ± 0.5 years, fat mass: 19.9 ± 1.2%). Skin temperature was measured with 26 ibuttons at 1-minute intervals in warm and cold room conditions...
September 5, 2017: Scientific Reports
Craig Whitworth-Turner, Rocco Di Michele, Ian Muir, Warren Gregson, Barry Drust
During the competitive season, soccer players are likely exposed to numerous factors that may disrupt the process of sleep. The current investigation looked to evaluate a practical sleep hygiene strategy (10-min showering at ∼40°C before lights out), within a group of 11 youth soccer players in comparison to normal sleeping conditions (control). Each condition consisted of three days within a randomised crossover trial design. Sleep information was collected using a commercial wireless bedside sleep monitor...
October 2017: European Journal of Sport Science
Mirim Shin, Raymond Patton, Trevor Mahar, Angus Ireland, Paul Swan, Chin Moi Chow
Accurate relative humidity (RH) measurement is demanded in studies of thermal comfort. Thermal discomfort occurs when the near-to-skin temperature or RH is outside of the thermal comfort zone. The Hygrochron, a small wireless device which measures both temperature and RH, would be suitable and convenient in exercise or sleep studies. However, the RH measurement has not been validated. This paper has three parts. Part 1: In evaluating the sensor surface for RH detection, four Hygrochrons were placed on a wet paper towel...
June 27, 2017: Physiology & Behavior
Juan Manuel Antúnez, María Del Mar Capella, José Francisco Navarro, Ana Adan
Although there have been described alterations of circadian rhythmicity both in patients with substance use disorder (SUD) and patients with major depressive disorder (MDD), the circadian characteristics of SUD patients with comorbid MDD (SUD-MDD) are unknown. Likewise, the possible influence of the different modalities of treatments (ambulatory or therapeutic community) upon the circadian rhythmicity of SUD patients has not been characterized. Therefore, this study analyzes the circadian rhythmic profiles of SUD and SUD-MDD patients under ambulatory and therapeutic community treatment...
2016: Chronobiology International
Mathew Vickers, Lin Schwarzkopf
To study behavioral thermoregulation, it is useful to use thermal sensors and physical models to collect environmental temperatures that are used to predict organism body temperature. Many techniques involve expensive or numerous types of sensors (cast copper models, or temperature, humidity, radiation, and wind speed sensors) to collect the microhabitat data necessary to predict body temperatures. Expense and diversity of requisite sensors can limit sampling resolution and accessibility of these methods. We compare body temperature predictions of small lizards from iButtons, DS18B20 sensors, and simple copper models, in both laboratory and natural conditions...
May 2016: Ecology and Evolution
M Pascual-Alonso, G C Miranda-de la Lama, L Aguayo-Ulloa, M Villarroel, M Mitchell, G A María
The study was conducted to evaluate the thermophysiological, haematological, biochemical and behavioural stress responses of sheep transported on road. A total of 44 Chamarita breed adult ewes were randomly allotted to one of two groups, one control group (untransported) and transported group (journey of 4 h), and blood stress indicators were measured 1 day before transport and at four time points post-transport (0, 4 and 24 h). Thermophysiological profiles of ewes were measured by temperature buttons (iButton Thermochron(®) ) and placed in intravaginal sponges...
June 2017: Journal of Animal Physiology and Animal Nutrition
D Adam, S D Johnston, L Beard, V Nicholson, A Lisle, J Gaughan, R Larkin, P Theilemann, A Mckinnon, W Ellis
BACKGROUND: Under predicted climate change scenarios, koala distribution in Australia is expected to be adversely affected. Recent studies have attempted to identify suitable habitat, based on models of bioclimatic regions, but to more accurately reflect the thermal tolerance and behavioural adaptations of the various regional populations, the koala's response to periods of heat stress will need to be investigated at the individual animal level. OBJECTIVE: To explore the safety and suitability of temperature-sensitive intra-abdominal implants for monitoring core body temperature in the koala...
January 2016: Australian Veterinary Journal
T S Pronina, N I Orlova, V P Rybakov
Results of long-term research of becoming circadian rhythm of temperature (CRT) of human skin of shoulder during puberty are presented. For this purpose, 48-hour monitoring T at children, teenagers and mature young men and female from 8 till 22-th years with application of a method "Thermochron iButton" has been led. Age dynamics of mesor, reflecting process of becoming thermoregulation of organism during puberty, has wave character. The first wave with maximum T was observed at children of 10-11 years, second maximum T--at teenagers of 14-15 years...
March 2015: Fiziologiia Cheloveka
Luísa K Pilz, Caroline L Quiles, Eliane Dallegrave, Rosa Levandovski, Maria Paz L Hidalgo, Elaine Elisabetsky
OBJECTIVE: Circadian disturbances common to modern lifestyles have been associated with mood disorders. Animal models that mimic such rhythm disturbances are useful in translational research to explore factors contributing to depressive disorders. This study aimed to verify the susceptibility of BALB/c, C57BL/6N, and CF1 mice to photoperiod changes. METHODS: Thermochron iButtons implanted in the mouse abdomen were used to characterize temperature rhythms. Mice were maintained under a 12:12 h light-dark (LD) cycle for 15 days, followed by a 10:10 h LD cycle for 10 days...
July 2015: Revista Brasileira de Psiquiatria
Aaron J E Bach, Ian B Stewart, Alice E Disher, Joseph T Costello
PURPOSE: Skin temperature assessment has historically been undertaken with conductive devices affixed to the skin. With the development of technology, infrared devices are increasingly utilised in the measurement of skin temperature. Therefore, our purpose was to evaluate the agreement between four skin temperature devices at rest, during exercise in the heat, and recovery. METHODS: Mean skin temperature ([Formula: see text]) was assessed in thirty healthy males during 30 min rest (24...
2015: PloS One
E R Kuras, D M Hondula, J Brown-Saracino
Urban environmental health hazards, including exposure to extreme heat, have become increasingly important to understand in light of ongoing climate change and urbanization. In cities, neighborhoods are often considered a homogenous and appropriate unit with which to assess heat risk. This manuscript presents results from a pilot study examining the variability of individually experienced temperatures (IETs) within a single urban neighborhood. In July 2013, 23 research participants were recruited from the South End neighborhood of Boston and equipped with Thermochron iButtons that measured the air temperatures surrounding individuals as they went about their daily lives...
October 2015: International Journal of Biometeorology
Ajay Pillarisetti, Mayur Vaswani, Darby Jack, Kalpana Balakrishnan, Michael N Bates, Narendra K Arora, Kirk R Smith
Household air pollution generated from solid fuel use for cooking is one of the leading risk factors for ill-health globally. Deployment of advanced cookstoves to reduce emissions has been a major focus of intervention efforts. However, household usage of these stoves and resulting changes in usage of traditional polluting stoves is not well characterized. In Palwal District, Haryana, India, we carried out an intervention utilizing the Philips HD4012 fan-assisted stove, one of the cleanest biomass stoves available...
December 16, 2014: Environmental Science & Technology
Luísa K Pilz, Yasmine Trojan, Caroline L Quiles, Radharani Benvenutti, Gabriela Melo, Rosa Levandovski, Maria Paz L Hidalgo, Elaine Elisabetsky
Circadian rhythm disturbances are among the risk factors for depression, but specific animal models are lacking. This study aimed to characterize the effects of acute rhythm disruption in mice and investigate the effects of imipramine and N-acetylcysteine (NAC) on rhythm disruption-induced changes. Mice were exposed to 12:12-hour followed by 10:10-hour light:dark cycles (LD); under the latter, mice were treated with saline, imipramine or NAC. Rhythms of rest/activity and temperature were assessed with actigraphs and iButtons, respectively...
March 2015: Chronobiology International
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