Infrared thermography provides insight into the thermal properties of bird nests
This study investigated the insulative properties of nests of the Eurasian Bullfinch (Pyrrhula pyrrhula), the Common Blackbird (Turdus merula) and the Song Thrush (Turdus philomelos) using IR thermography. Nests were inverted over a heat source and the temperature of the external nest surface was recorded. Bullfinch nests were less insulated than thrush nests. Including foil inside the nest cup decreased the amount of convection through the open walls of Bullfinch nests. Removal of the outer nest and cup lining of thrush nests only slightly decreased the degree of insulation offered by the nest indicating an important insu...
Source: Journal of Thermal Biology - July 20, 2018 Category: Biology Source Type: research

The effect of water temperature on muscle cellularity and gill tissue of larval and juvenile Lophiosilurus alexandri, a Neotropical freshwater fish
Publication date: Available online 11 July 2018Source: Journal of Thermal BiologyAuthor(s): Rodrigo Takata, Cíntia Labussière Nakayama, Walisson de Souza e Silva, Nilo Bazzoli, Ronald Kennedy LuzAbstractThe effect of temperature on muscle development and gill tissue were investigated in larval and juvenile Lophiosilurus alexandri, a carnivorous Neotropical fish species. Larvae and juveniles were reared at temperatures of 23, 26, 29 and 32 °C for 15 and 35 days, respectively. The larvae were fed Artemia nauplii, while the juveniles received a formulated diet. In both stages, high temperatures resulted...
Source: Journal of Thermal Biology - July 12, 2018 Category: Biology Source Type: research

Interactions between perceived exertion and thermal perception in the heat in endurance athletes
Publication date: Available online 11 July 2018Source: Journal of Thermal BiologyAuthor(s): Gilles Roussey, Mathieu Gruet, Fabrice Vercruyssen, Julien Louis, Jean-Marc Vallier, Thierry BernardAbstractIntroductionThe study aimed to investigate how a distortion of perceived exertion in the heat may affect, during a self-paced cycling exercise preceded by prior cognitive task, the thermal perception and the subsequent regulation of power output in high level athletes.MethodsEleven endurance trained male athletes completed four experimental sessions including a 30-min fixed-RPE (15-Hard) cycling exercise in neutral (TMP-22 &de...
Source: Journal of Thermal Biology - July 12, 2018 Category: Biology Source Type: research

Source of environmental data and warming tolerance estimation in six species of North American larval anurans
Publication date: Available online 10 July 2018Source: Journal of Thermal BiologyAuthor(s): Marco Katzenberger, John Hammond, Miguel Tejedo, Rick RelyeaAbstractThe current global warming scenario has led to a renewed interest in determining which species are more vulnerable to climate change. Hence, it is important to understand which factors can affect estimates of species vulnerability. We determined the critical thermal maxima (CTmax) for six species of North American anuran larvae and measured the environmental temperatures to which they are exposed during their aquatic stage to estimate their warming tolerance (WT; di...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

To warm on the rocks, to cool in the wind: Thermal relations of a small-sized lizard from a mountain environment
Publication date: Available online 10 July 2018Source: Journal of Thermal BiologyAuthor(s): Ana Sofia Buza Gontijo, Camila Santos Garcia, Alexandre Ferreira Righi, Conrado A.B. GaldinoAbstractRising temperatures accompanying global climate change are expected to affect mountain lizards. Therefore, basic information on how these ectotherms deal with their thermal environment is important for further management. We conducted a field study to evaluate how body temperature of the small-sized mountain lizard Eurolophosaurus nanuzae relates to the thermal environment. After capture, the body temperature of the lizards was measur...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Optimization of Prostatic Cryosurgery with Multi-Cryoprobe based on Refrigerant Flow
Publication date: Available online 11 July 2018Source: Journal of Thermal BiologyAuthor(s): S.M. Chapal Hossain, Xin Zhang, Zeeshan Haider, Peng Hu, Gang ZhaoAbstractCryosurgery is a promising novel minimally invasive surgical technique to eradicate carcinoma and non-carcinoma tissues by freezing. In this research, we applied a transient 3D two-phase refrigerant flow model inside the LN2 boiling chamber as well as a bioheat transfer model inside the tissues to evaluate the optimized ablation outcome during prostatic cryosurgery. For the evaluation of the scenarios, a defect function was used that considers non-ablated targ...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Estimation the tumor temperature in magnetic nanoparticle hyperthermia by infrared thermography: phantom and numerical studies
Publication date: Available online 11 July 2018Source: Journal of Thermal BiologyAuthor(s): Ming Ma, Yu Zhang, Ning GuAbstractThe treatment of cancer by hyperthermia requires prediction, monitoring and control of the temperature within the tumor. Infrared thermography (IRT) was presented in this paper as a noninvasive temperature monitoring method used in magnetic nanoparticle hyperthermia (MNH). We tried to use this surface temperature measurement method to get information about the intratumoral temperature. Experimental in vitro MNH studies were performed on gel tumor-tissue phantoms which were constructed to simulate th...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Heat death in poikilotherms: is there a common cause?
Publication date: Available online 18 June 2018Source: Journal of Thermal BiologyAuthor(s): Ken BowlerAbstractThe primary aim of this contribution is to make the case for membrane impairment as the outcome of the exposure of poikilotherms to damaging high temperatures that result in organism heat death. The paper emphasises that heat death points are not fixed but are altered by acclimation, acclimatization, heat shock and hardening. The definition of these terms is revisited as there is confusion in their usage in the literature. That poikilotherm heat death points depend on acclimation temperature is one of the most demo...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Impact of nitrogen additions on soil microbial respiration and temperature sensitivity in native and agricultural ecosystems in the Brazilian Cerrado
This study shows that N additions to tropical soils alter Q10 values depending on dose and land use. These are important findings to compare the fragility of pristine and cultivated Brazilian Cerrado ecosystems in the perspective of climate change. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Editorial Board
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Arthropods life cycle and temperature: Beyond isomorphy hypothesis
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Olivier Bonato, Joel ChadoeufAbstractIn poikilotherms, developmental time and adult lifespan are biological traits driven by temperature although their underlying physiological mechanisms differ. The developmental theory of ageing predicts a positive correlation between these two traits without confirming a genetic or causal relationship. The developmental rate isomorphy hypothesis established that the proportionality in the duration of each pre-imaginal stage with respect to total developmental time does not vary with temperature. This may ...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Effects of pre-lambing maternal energy supplementation on post-weaning productive performance and thermoregulatory capacity of heat-stressed male lambs
This study aimed to evaluate effects of maternal energy supplementation during the last third of pregnancy on post-weaning feedlot performance and thermoregulation capacity of heat-stressed male lambs born from multiple births. Twenty Dorper x Pelibuey entire male lambs with initial body weight of 18.2 ± 0.4 kg, aged 2.7 mo (weaned) and born in multiple pregnancies were used in a 32 d feeding study. Treatments were based in the prenatal origin of the lambs: 1) ewes fed 100 (n = 10, Control) and 2) 125% (n = 10, Supplemented) of metabolizable energy requirements from day 100 of gestation to lambing. Lam...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Effects of thermal discharge from Neka power plant (southern Caspian Sea) on macrobenthic diversity and abundance
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Ayda Bozorgchenani, Jafar Seyfabadi, Mohammad Reza ShokriAbstractEffects of thermal discharge from Neka power plant on macrobenthic diversity and abundance was studied in the southern coast of the Caspian Sea. Samples were collected with Van Veen grab of 0.0250 m2 surface area from 7 stations in winter and summer. A total of 42 species were identified that belonged to 22 genera, 18 families, 13 orders, six classes and three phyla. Bivalve with a total abundance of 90% in winter and 86% in summer constituted the most abundant group througho...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

It's about time: Linkages between heat tolerance, thermal acclimation and metabolic rate at different temporal scales in the freshwater amphipod Gammarus fossarum Koch, 1836
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Maryam Semsar-kazerouni, Wilco C.E.P. VerberkAbstractTemperature has a profound impact on ectotherms. Warming increases the metabolic oxygen demand of ectotherms, which could result in a mismatch between their oxygen demand and their ability to extract and deliver sufficient oxygen to meet demand. This hypothesis has been mainly tested using short-term exposure to intense thermal stress. However, the thermal responses of organisms can be different on longer timescales, where physiological acclimation becomes increasingly important. Such ther...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Investigating Nrf2-associated non-coding RNAs in the hibernating ground squirrel, Ictidomys tridecemlineatus
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Jacques J. Frigault, Josée D. Gaudet, Pier Jr MorinAbstractSmall mammals hibernate to deal with environmental conditions associated with the winter season. Numerous physiological changes occur during a typical torpor-arousal cycle including variations in heart rate and blood flow. Such cycle possesses characteristics of ischemia-reperfusion cycles that can lead to oxidative stress in non-hibernating models. Interestingly, hibernators can cope with these conditions and the complete molecular picture underlying this adaptation is not fu...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

The impact of posture and basking orientation on thermoregulation in the Sungazer (Smaug giganteus)
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Wade K. Stanton-Jones, Shivan Parusnath, Graham J. AlexanderAbstractBody temperature (Tb) is one of the most influential factors affecting physiological processes in ectothermic animals. Reptiles use behaviours such as shuttling, and postural and orientation adjustments to ensure that Tb remains close to a target. It is thought that target body temperature (Ttarget) is aligned to the physiological and behavioural thermal optima of the animal. The Sungazer (Smaug giganteus), a Threatened lizard species, is unique amongst the Cordylidae in tha...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Thermal quality influences habitat use of two anole species
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Michelle E. Thompson, Brian J. Halstead, Maureen A. DonnellyAbstractRegeneration of secondary forests on previously deforested or degraded land is one of the most dominant forms of land-use change in the tropics. However, the response of animal communities to forest regeneration is poorly understood. To evaluate support for thermal quality as a mechanism driving reptile species distributions during secondary forest succession, we measured operative temperatures and occupancy in three successional forest stages (pasture, secondary forest, and...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Temperature-induced phenotypic plasticity in the ovipositor of the invasive species Drosophila suzukii
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Maria Clemente, Giuseppe Fusco, Lorenzo Tonina, Folco GiomiAbstractDrosophila suzukii (Matsumura, 1931) is a highly successful invasive dipteran which represents a serious threat for global fruit industry. Among other adaptive traits, D. suzukii owes its success to the derived morphological features of its ovipositor, which allows the insect to exploit the exclusive ecological niche of fresh fruit, thus avoiding competition with other closely related species. With the aim of investigating temperature-induced phenotypic plasticity of D. suzuk...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Computational modeling of the effect of temperature variations on human pancreatic β-cell activity
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Sajjad Farashi, Pezhman Sasanpour, Hashem Rafii-TabarAbstractThe effect of temperature variations on the pancreatic β-cell activity and the role of different model compartments in temperature sensing have been investigated using a computational modeling approach. The results of our study show that temperature variations by several degrees can change the dynamical states of the β-cell system. In addition, temperature variations can alter the characteristic features of the membrane voltage, which correlates with insulin secretion. Si...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Thermal ecology and microhabitat use of an arboreal lizard in two different Pantanal wetland phytophysionomies (Brazil)
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Juliana de Souza Terra, Zaida Ortega, Vanda Lúcia FerreiraAbstractTemperature is one of the main environmental variables shaping the evolution and biology of terrestrial ectotherms. The Pantanal is the largest continuous wetland in the World. However, a lack of knowlegde still exists on the thermal ecology of terrestrial ectothems from this wetland. In this context, the thermal ecology of the lizard Tropidurus lagunablanca Carvalho, 2016 (Squamata, Tropiduridae) was investigated in the Brazilian Pantanal. The thermal ecology and micro...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Heat tolerance and gene expression responses to heat stress in threespine sticklebacks from ecologically divergent environments
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Karin Brydsø Dammark, Anne-Laure Ferchaud, Michael M. Hansen, Jesper G. SørensenAbstractEctothermic animals like fishes are extremely dependent on temperature, as they are not able to change body temperature physiologically. When populations are found in isolated water bodies such as small lakes they will have to respond to stressful high temperatures by behavioral avoidance, phenotypic plasticity or microevolutionary change. We analyzed threespine sticklebacks from two large and two small lakes, representing different isolated...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Thermal ecology and activity patterns of six species of tropical night lizards (Squamata: Xantusiidae: Lepidophyma) from Mexico
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Diego Miguel Arenas-Moreno, Rufino Santos-Bibiano, Francisco Javier Muñoz-Nolasco, Pierre Charruau, Fausto Roberto Méndez-de la CruzAbstractActivity patterns in ectotherms rely on the structure of the thermal environment and thermoregulatory opportunities during activity periods. A dichotomy between diurnal and nocturnal ectotherms is not clear in every case, and temperature can directly affect the daily activity period in these organisms during both photophase and scotophase. In the present study we evaluate the thermal ecolog...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Dietary mannan oligosaccharide improves growth performance, muscle oxidative status, and meat quality in broilers under cyclic heat stress
This study investigated the effects of dietary mannan oligosaccharide (MOS) supplementation on growth performance, serum corticosterone level, and antioxidant ability, meat quality as well as chemical composition of breast muscle in broilers exposed to cyclic heat stress (HS). 144 one-day-old male broiler chicks (Arbor Acres plus) were randomly allocated to 3 treatments with 6 replicates each. Broilers in the control and HS groups were fed a basal diet, and in the MOS group were given the basal diet supplemented with 1 g/kg MOS for 42 days, respectively. The temperature was maintained 32–33 °C for the first 3...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

The influence of body composition on exercise-associated skin temperature changes after resistance training
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Martin Weigert, Nico Nitzsche, Felix Kunert, Christiane Lösch, Henry SchulzAbstractResistance exercise leads to an increase in skin temperature (Tskin) in the area of the exercised muscle. Infrared thermography seems to be applicable to identify these primary used functional muscles with measuring Tskin changes. The aim of the current study was to investigate the influence of body composition on Tskin patterns after resistance exercise.38 male subjects (19–32 years, BMI 20.4–55.2 kg/m2) participated. Body fat percentage an...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Predicting Recovery from Exertional Heat Strain in Military Working Dogs
Publication date: Available online 5 July 2018Source: Journal of Thermal BiologyAuthor(s): Catherine O’Brien, Larry G. BerglundAbstractA two-compartment (core, skin) rational Canine Thermal Model (CTM) of thermal-physiological responses was developed to predict the core temperature (Tc) of a military working dog (MWD) during recovery from exertional heat stress. Heat storage is represented as the balance among heat loss mechanisms, heat gain from the environment, and heat production from metabolism. Inputs to the CTM include environmental conditions (ambient temperature, relative humidity, solar radiation and wind sp...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Numerical simulation for treatment of hypothermia based on vascular interventional direct heating system
Publication date: August 2018Source: Journal of Thermal Biology, Volume 76Author(s): Yi Hou, Yuanyuan Qiao, Dajin Zhang, Chenghe Shi, Jing Liu, Zhizhu He, Wei RaoAbstractThe treatment of hypothermia suffered by naval fighters owing to seawater immersion has been a focus of research in recent years. Currently, the treatment of hypothermia in China is limited to external rewarming, which is of low efficiency and is not effective for patients suffering moderate to severe hypothermia. We thus proposed a vascular interventional heating method which directly heats the blood flow via a minimally invasive heating needle for rewarm...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Effect of feed intake level on the body temperature of pigs exposed to heat stress conditions
This study analyzed the effect of FI level on BT of 9 HS pigs (46.3 ± 2.6 kg body weight) implanted with a thermometer set to register the BT at 5-min intervals into the ileum. Pigs were divided in two groups randomly allotted to two FI treatments: high FI (HFI, 1.20 kg/d), and low FI (LFI, 0.96 kg/d), according to a two-period crossover experimental design. Pigs were fed 3-times a day (0600, 1200, and 2200 h), same amount each time (400 g or 320 g). Ambient temperature (AT) ranged from 29.0 to 35.4 °C. The BT of both HFI and LFI pigs followed a similar pattern along a 24-h period, but the...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Thermal modelling of controlled scalp hypothermia using a thermoelectric cooling cap
This study presents a novel, thermoelectric cryotherapy cap that aims to provide effective and controlled scalp cooling to prevent hair loss for chemotherapy patients. The cap's design consists of multiple thermoelectric coolers (TECs) evenly spaced and bonded to a soft thermal interface material, tightly fitted to a patient's head. A numerical model is developed to assess the performance of alternative cap designs in relation to their ability to achieve hair follicle hypothermia. Under ideal conditions, 26.5 W of heat removal from the scalp is required to achieve the clinically-significant follicle temperature target of...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Speed of exposure to rapid cold hardening and genotype drive the level of acclimation response in Drosophila melanogaster
Publication date: August 2018Source: Journal of Thermal Biology, Volume 76Author(s): Alison R. Gerken, Olivia C. Eller-Smith, Theodore J. MorganAbstractComparing methodologies that attempt to mimic natural conditions is important when evaluating thermal tolerances of ectotherms, as exposing animals to different artificial thermal regimes may provide conflicting information of an insect's thermal profile. Rapid cold hardening (RCH) occurs in ectotherms and typically increases survivorship to extreme cold exposure through a short, pre-treatment to a non-lethal cold temperature. Here we assess survivorship in a set of genotyp...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Betaine and ascorbic acid modulate indoor behavior and some performance indicators of broiler chickens in response to hot-dry season
Publication date: August 2018Source: Journal of Thermal Biology, Volume 76Author(s): Ifeanyichukwu Chukwuemeka Egbuniwe, Joseph Olusegun Ayo, Ohiemi Benjamin OchejaAbstractHeat stress causes lipid peroxidation in poultry, necessitating antioxidant administration. The experiment evaluated the modulating effects of betaine and ascorbic acid (AA) on indoor behavior and some performance parameters of broiler chickens during the hot-dry season. Experimental groups were: Group I (control) was daily given sterile water; Group II, betaine at 250 mg/kg; Group III, AA (50 mg/kg), and Group IV, betaine (250 mg/kg) + AA (50 mg...
Source: Journal of Thermal Biology - July 11, 2018 Category: Biology Source Type: research

Heat death in poikilotherms: is there a common cause?
Publication date: Available online 18 June 2018Source: Journal of Thermal BiologyAuthor(s): Ken BowlerAbstractThe primary aim of this contribution is to make the case for membrane impairment as the outcome of the exposure of poikilotherms to damaging high temperatures that result in organism heat death. The paper emphasises that heat death points are not fixed but are altered by acclimation, acclimatization, heat shock and hardening. The definition of these terms is revisited as there is confusion in their usage in the literature. That poikilotherm heat death points depend on acclimation temperature is one of the most demo...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Impact of nitrogen additions on soil microbial respiration and temperature sensitivity in native and agricultural ecosystems in the Brazilian Cerrado
This study shows that N additions to tropical soils alter Q10 values depending on dose and land use. These are important findings to compare the fragility of pristine and cultivated Brazilian Cerrado ecosystems in the perspective of climate change. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Editorial Board
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Arthropods life cycle and temperature: Beyond isomorphy hypothesis
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Olivier Bonato, Joel ChadoeufAbstractIn poikilotherms, developmental time and adult lifespan are biological traits driven by temperature although their underlying physiological mechanisms differ. The developmental theory of ageing predicts a positive correlation between these two traits without confirming a genetic or causal relationship. The developmental rate isomorphy hypothesis established that the proportionality in the duration of each pre-imaginal stage with respect to total developmental time does not vary with temperature. This may ...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Effects of pre-lambing maternal energy supplementation on post-weaning productive performance and thermoregulatory capacity of heat-stressed male lambs
This study aimed to evaluate effects of maternal energy supplementation during the last third of pregnancy on post-weaning feedlot performance and thermoregulation capacity of heat-stressed male lambs born from multiple births. Twenty Dorper x Pelibuey entire male lambs with initial body weight of 18.2 ± 0.4 kg, aged 2.7 mo (weaned) and born in multiple pregnancies were used in a 32 d feeding study. Treatments were based in the prenatal origin of the lambs: 1) ewes fed 100 (n = 10, Control) and 2) 125% (n = 10, Supplemented) of metabolizable energy requirements from day 100 of gestation to lambing. Lam...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Effects of thermal discharge from Neka power plant (southern Caspian Sea) on macrobenthic diversity and abundance
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Ayda Bozorgchenani, Jafar Seyfabadi, Mohammad Reza ShokriAbstractEffects of thermal discharge from Neka power plant on macrobenthic diversity and abundance was studied in the southern coast of the Caspian Sea. Samples were collected with Van Veen grab of 0.0250 m2 surface area from 7 stations in winter and summer. A total of 42 species were identified that belonged to 22 genera, 18 families, 13 orders, six classes and three phyla. Bivalve with a total abundance of 90% in winter and 86% in summer constituted the most abundant group througho...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

It's about time: Linkages between heat tolerance, thermal acclimation and metabolic rate at different temporal scales in the freshwater amphipod Gammarus fossarum Koch, 1836
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Maryam Semsar-kazerouni, Wilco C.E.P. VerberkAbstractTemperature has a profound impact on ectotherms. Warming increases the metabolic oxygen demand of ectotherms, which could result in a mismatch between their oxygen demand and their ability to extract and deliver sufficient oxygen to meet demand. This hypothesis has been mainly tested using short-term exposure to intense thermal stress. However, the thermal responses of organisms can be different on longer timescales, where physiological acclimation becomes increasingly important. Such ther...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Investigating Nrf2-associated non-coding RNAs in the hibernating ground squirrel, Ictidomys tridecemlineatus
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Jacques J. Frigault, Josée D. Gaudet, Pier Jr MorinAbstractSmall mammals hibernate to deal with environmental conditions associated with the winter season. Numerous physiological changes occur during a typical torpor-arousal cycle including variations in heart rate and blood flow. Such cycle possesses characteristics of ischemia-reperfusion cycles that can lead to oxidative stress in non-hibernating models. Interestingly, hibernators can cope with these conditions and the complete molecular picture underlying this adaptation is not fu...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

The impact of posture and basking orientation on thermoregulation in the Sungazer (Smaug giganteus)
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Wade K. Stanton-Jones, Shivan Parusnath, Graham J. AlexanderAbstractBody temperature (Tb) is one of the most influential factors affecting physiological processes in ectothermic animals. Reptiles use behaviours such as shuttling, and postural and orientation adjustments to ensure that Tb remains close to a target. It is thought that target body temperature (Ttarget) is aligned to the physiological and behavioural thermal optima of the animal. The Sungazer (Smaug giganteus), a Threatened lizard species, is unique amongst the Cordylidae in tha...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Thermal quality influences habitat use of two anole species
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Michelle E. Thompson, Brian J. Halstead, Maureen A. DonnellyAbstractRegeneration of secondary forests on previously deforested or degraded land is one of the most dominant forms of land-use change in the tropics. However, the response of animal communities to forest regeneration is poorly understood. To evaluate support for thermal quality as a mechanism driving reptile species distributions during secondary forest succession, we measured operative temperatures and occupancy in three successional forest stages (pasture, secondary forest, and...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Temperature-induced phenotypic plasticity in the ovipositor of the invasive species Drosophila suzukii
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Maria Clemente, Giuseppe Fusco, Lorenzo Tonina, Folco GiomiAbstractDrosophila suzukii (Matsumura, 1931) is a highly successful invasive dipteran which represents a serious threat for global fruit industry. Among other adaptive traits, D. suzukii owes its success to the derived morphological features of its ovipositor, which allows the insect to exploit the exclusive ecological niche of fresh fruit, thus avoiding competition with other closely related species. With the aim of investigating temperature-induced phenotypic plasticity of D. suzuk...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Computational modeling of the effect of temperature variations on human pancreatic β-cell activity
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Sajjad Farashi, Pezhman Sasanpour, Hashem Rafii-TabarAbstractThe effect of temperature variations on the pancreatic β-cell activity and the role of different model compartments in temperature sensing have been investigated using a computational modeling approach. The results of our study show that temperature variations by several degrees can change the dynamical states of the β-cell system. In addition, temperature variations can alter the characteristic features of the membrane voltage, which correlates with insulin secretion. Si...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Thermal ecology and microhabitat use of an arboreal lizard in two different Pantanal wetland phytophysionomies (Brazil)
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Juliana de Souza Terra, Zaida Ortega, Vanda Lúcia FerreiraAbstractTemperature is one of the main environmental variables shaping the evolution and biology of terrestrial ectotherms. The Pantanal is the largest continuous wetland in the World. However, a lack of knowlegde still exists on the thermal ecology of terrestrial ectothems from this wetland. In this context, the thermal ecology of the lizard Tropidurus lagunablanca Carvalho, 2016 (Squamata, Tropiduridae) was investigated in the Brazilian Pantanal. The thermal ecology and micro...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Heat tolerance and gene expression responses to heat stress in threespine sticklebacks from ecologically divergent environments
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Karin Brydsø Dammark, Anne-Laure Ferchaud, Michael M. Hansen, Jesper G. SørensenAbstractEctothermic animals like fishes are extremely dependent on temperature, as they are not able to change body temperature physiologically. When populations are found in isolated water bodies such as small lakes they will have to respond to stressful high temperatures by behavioral avoidance, phenotypic plasticity or microevolutionary change. We analyzed threespine sticklebacks from two large and two small lakes, representing different isolated...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Thermal ecology and activity patterns of six species of tropical night lizards (Squamata: Xantusiidae: Lepidophyma) from Mexico
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Diego Miguel Arenas-Moreno, Rufino Santos-Bibiano, Francisco Javier Muñoz-Nolasco, Pierre Charruau, Fausto Roberto Méndez-de la CruzAbstractActivity patterns in ectotherms rely on the structure of the thermal environment and thermoregulatory opportunities during activity periods. A dichotomy between diurnal and nocturnal ectotherms is not clear in every case, and temperature can directly affect the daily activity period in these organisms during both photophase and scotophase. In the present study we evaluate the thermal ecolog...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Dietary mannan oligosaccharide improves growth performance, muscle oxidative status, and meat quality in broilers under cyclic heat stress
This study investigated the effects of dietary mannan oligosaccharide (MOS) supplementation on growth performance, serum corticosterone level, and antioxidant ability, meat quality as well as chemical composition of breast muscle in broilers exposed to cyclic heat stress (HS). 144 one-day-old male broiler chicks (Arbor Acres plus) were randomly allocated to 3 treatments with 6 replicates each. Broilers in the control and HS groups were fed a basal diet, and in the MOS group were given the basal diet supplemented with 1 g/kg MOS for 42 days, respectively. The temperature was maintained 32–33 °C for the first 3...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

The influence of body composition on exercise-associated skin temperature changes after resistance training
Publication date: July 2018Source: Journal of Thermal Biology, Volume 75Author(s): Martin Weigert, Nico Nitzsche, Felix Kunert, Christiane Lösch, Henry SchulzAbstractResistance exercise leads to an increase in skin temperature (Tskin) in the area of the exercised muscle. Infrared thermography seems to be applicable to identify these primary used functional muscles with measuring Tskin changes. The aim of the current study was to investigate the influence of body composition on Tskin patterns after resistance exercise.38 male subjects (19–32 years, BMI 20.4–55.2 kg/m2) participated. Body fat percentage an...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Predicting Recovery from Exertional Heat Strain in Military Working Dogs
Publication date: Available online 5 July 2018Source: Journal of Thermal BiologyAuthor(s): Catherine O’Brien, Larry G. BerglundAbstractA two-compartment (core, skin) rational Canine Thermal Model (CTM) of thermal-physiological responses was developed to predict the core temperature (Tc) of a military working dog (MWD) during recovery from exertional heat stress. Heat storage is represented as the balance among heat loss mechanisms, heat gain from the environment, and heat production from metabolism. Inputs to the CTM include environmental conditions (ambient temperature, relative humidity, solar radiation and wind sp...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Numerical simulation for treatment of hypothermia based on vascular interventional direct heating system
Publication date: August 2018Source: Journal of Thermal Biology, Volume 76Author(s): Yi Hou, Yuanyuan Qiao, Dajin Zhang, Chenghe Shi, Jing Liu, Zhizhu He, Wei RaoAbstractThe treatment of hypothermia suffered by naval fighters owing to seawater immersion has been a focus of research in recent years. Currently, the treatment of hypothermia in China is limited to external rewarming, which is of low efficiency and is not effective for patients suffering moderate to severe hypothermia. We thus proposed a vascular interventional heating method which directly heats the blood flow via a minimally invasive heating needle for rewarm...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research

Effect of feed intake level on the body temperature of pigs exposed to heat stress conditions
This study analyzed the effect of FI level on BT of 9 HS pigs (46.3 ± 2.6 kg body weight) implanted with a thermometer set to register the BT at 5-min intervals into the ileum. Pigs were divided in two groups randomly allotted to two FI treatments: high FI (HFI, 1.20 kg/d), and low FI (LFI, 0.96 kg/d), according to a two-period crossover experimental design. Pigs were fed 3-times a day (0600, 1200, and 2200 h), same amount each time (400 g or 320 g). Ambient temperature (AT) ranged from 29.0 to 35.4 °C. The BT of both HFI and LFI pigs followed a similar pattern along a 24-h period, but the...
Source: Journal of Thermal Biology - July 5, 2018 Category: Biology Source Type: research