Paper wasps are darker at high elevation
Publication date: Available online 16 February 2020Source: Journal of Thermal BiologyAuthor(s): André R. de Souza, Angie Z. Mayorquin, Carlos E. SarmientoAbstract:High mountains are harsh environments in which colder temperatures and higher levels of UV-B radiation are common. These abiotic conditions strongly affect animals’ biology, often constraining their survival and reproduction. As a result, adaptations to live in such habitats are expected to evolve. Body color is thought to be adaptive to the environment that animals experience. Tegument melanization improves heat gain and provides photoprotection. Th...
Source: Journal of Thermal Biology - February 17, 2020 Category: Biology Source Type: research

The effect of mild whole-body cold stress on isometric force control during hand grip and key pinch tasks
Publication date: Available online 15 February 2020Source: Journal of Thermal BiologyAuthor(s): Julie Renberg, Øystein Nordrum Wiggen, Juha Oksa, Kristine Blomvik Dyb, Randi Eidsmo Reinertsen, Karin RoeleveldAbstractProlonged exposure to cold can impair manual performance, which in turn can affect work task performance. We investigated whether mild whole-body cold stress would affect isometric force control during submaximal hand grip and key pinch tasks. Twelve male participants performed isometric hand grip and key pinch tasks at 10% and 30% of maximal voluntary contraction (MVC) for 30 and 10 s respectively, in...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Increased cancer incidence in “cold” countries: An (un)sympathetic connection?
Publication date: Available online 15 February 2020Source: Journal of Thermal BiologyAuthor(s): Boris Mravec, Miroslav TibenskyAbstractPublished data has shown that there is an unexpected, significantly increased cancer mortality and incidence in countries with low or subnormal environmental temperatures. There have been several hypotheses developed to elucidate the mechanisms behind these findings. It is well documented that cold represents a very efficient stressor that activates sympathetic nerves and increases tissue and plasma norepinephrine levels. Importantly, recently accumulated data indicate that norepinephrine c...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Responses of intestinal morphology and function in offspring to heat stress in primiparous sows during late gestation
Publication date: Available online 14 February 2020Source: Journal of Thermal BiologyAuthor(s): Huiduo Guo, Jianwen He, Xiaojing Yang, Weijiang Zheng, Wen YaoAbstractLate gestation is a key period for intestinal development. Maternal heat exposure may induce intestinal dysfunction of offspring. To investigate the responses of intestinal morphology and function of offspring to the maternal heat stress (HS), twelve first-parity Landrace × Large White sows were assigned to thermoneutral (TN) (18-22 °C; n = 6) or HS (28-32 °C; n = 6) treatment groups at 85 d of gestation until natural farrowing....
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Temperature and altitude modulate feeding attributes of Mexican beetle, Zygogramma bicolorata Pallister on Parthenium hysterophorus
Publication date: Available online 14 February 2020Source: Journal of Thermal BiologyAuthor(s): Daya Ram Bhusal, Kishor Chandra Ghimire, Priya Patel, Mahadev Bista, Rekha Upadhyay, Bhupendra KumarAbstractZygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is an effective biocontrol agent of Parthenium hysterophorus L. which is an alien invasive herbaceous weed with a pan-tropical distribution. The present study aimed to assess the effects of temperature and altitude on feeding attributes (consumption rate, conversion efficiency and growth rate) of adults from the wild populations of Z. bicolorata inhabiting India a...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Development of an animal adaptability index: Application for dairy cows
The objective of this study was designed to evaluate the association between physiological responses, hormonal, hematological and serum biochemical values features aiming to propose an adaptability index (AI) for dairy cows in tropical conditions. Thirty adult dairy cows were used, including 15 Sindi and 15 Girolando breeds with mean weight of 338.52 ± 42.79 kg and 487.54 ± 60.67 kg, respectively. These data included rectal temperature (RT), respiratory rate (RR), both were measured twice a once a month for twelve months. For the serum of blood sample, the levels of glucose (GLU), cholesterol (CHO...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Thermal tolerance of dried shoots of the moss Bryum argenteum
Publication date: Available online 15 February 2020Source: Journal of Thermal BiologyAuthor(s): Lu Zhuo, Yu-qing Liang, Hong-lan Yang, Xiao-shuang Li, Yiheng Zhang, Yi-gong Zhang, Kai-yun Guan, Dao-yuan ZhangAbstractWe conducted laboratory experiments to determine the lethal temperatures of the shoots of dried Bryum argenteum and to determine how this restoration species responds to extreme environments. We specifically assessed changes in gene expression levels in the shoots of dried B. argenteum plants that were subjected to sudden heat shock (control (20 ± 2°C), 80°C, 100°C, 110°C or 120°C...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Bat thermoregulation in the heat: Limits to evaporative cooling capacity in three southern African bats
Publication date: Available online 15 February 2020Source: Journal of Thermal BiologyAuthor(s): Z.J. Czenze, S. Naidoo, A. Kotze, A.E. McKechnieAbstractHigh environmental temperatures pose significant physiological challenges related to energy and water balance for small endotherms. Although there is a growing literature on the effect of high temperatures on birds, comparable data are scarcer for bats. Those data that do exist suggest that roost microsite may predict tolerance of high air temperatures. To examine this possibility further, we quantified the upper limits to heat tolerance and evaporative cooling capacity in ...
Source: Journal of Thermal Biology - February 16, 2020 Category: Biology Source Type: research

Modelling the effect of temperature on the biology and demographic parameters of the African coffee white stem borer, Monochamus leuconotus (Pascoe) (Coleoptera: Cerambycidae)
Publication date: Available online 14 February 2020Source: Journal of Thermal BiologyAuthor(s): Abdelmutalab G.A. Azrag, Abdullahi A. Yusuf, Christian W.W. Pirk, Saliou Niassy, Ephantus K. Guandaru, Guillaume David, Régis BabinAbstractThe African coffee white stem borer Monochamus leuconotus (Pascoe) (Coleoptera: Cerambycidae) is a destructive insect pest of Arabica coffee trees in African highlands. Our study aims to provide information on the pest biology as influenced by temperature, determine thermal thresholds, and provide life table parameters for M. leuconotus reared in the laboratory. The life cycle of M. le...
Source: Journal of Thermal Biology - February 14, 2020 Category: Biology Source Type: research

Effects of exposure to high temperatures on serum, urine and sweat concentrations of iron and copper
The objective of this research was to determine the acute effect of a maximum test until exhaustion in normothermia and hyperthermia, and after repeated exposure to heat at high temperatures on the homeostasis of Fe and Cu.The sample was composed of twenty-nine male university students. The participants were divided into a control group (CG) and an experimental group (EG). All of them underwent an incremental test until exhaustion in normothermia and hyperthermia before and after the repeated exposure of EG to heat at high temperatures, consisting of 9 heat acclimatisation sessions in the sauna. Samples of urine and blood ...
Source: Journal of Thermal Biology - February 13, 2020 Category: Biology Source Type: research

Bioheat modeling of elderly and young for prediction of physiological and thermal responses in heat-stressful conditions
Publication date: Available online 10 February 2020Source: Journal of Thermal BiologyAuthor(s): Mariam Itani, Nesreen Ghaddar, Kamel Ghali, Abdelaziz LaouadiAbstractExposure to hot and humid conditions results in physiological changes in metabolism, cardiac output and thermoregulation of the young adult and these changes deviate with elderly due to aging. The elderly population is more vulnerable than the healthy and young population due to age-weakened physiology and thermoregulatory functions. There are, however, limited bioheat models addressing such changes due to hot exposure in the young and the elderly. This paper d...
Source: Journal of Thermal Biology - February 10, 2020 Category: Biology Source Type: research

Effects of heat stress on ovarian development and the expression of HSP genes in mice
In this study, we subjected female mice to chronic and acute heat stresses; we then calculated the ovary index, examined ovary microstructure, and measured the expression of multiple HSP family genes. Chronic heat stress reduced whole-body and ovarian growth but had little effect on the ovarian index; acute heat stress did not alter whole-body or ovarian weight. Both chronic and acute heat stresses impaired ovary function by causing the dysfunction of granular cells. Small HSP genes increased rapidly after heat treatment, and members of the HSP40, HSP70, and HSP90 families were co-expressed to function in the regulation of...
Source: Journal of Thermal Biology - February 10, 2020 Category: Biology Source Type: research

Effects of constant and fluctuating incubation temperatures on hatching success and hatchling traits in the diamondback terrapin (Malaclemys terrapin) in the context of the warming climate
Publication date: February 2020Source: Journal of Thermal Biology, Volume 88Author(s): Christopher L. Rowe, Dong Liang, Ryan J. WoodlandAbstractAs global temperatures continue to rise, so too will the nest temperatures of many species of turtles. Yet for most turtle species, including the estuarine diamondback terrapin (Malaclemys terrapin), there is limited information on embryonic sensitivity to elevated temperature. We incubated eggs of M. terrapin at three, mean temperatures (31, 34, 37 °C) under two thermal exposure regimes (constant or semi-naturally fluctuating temperature) and measured hatching success, de...
Source: Journal of Thermal Biology - February 5, 2020 Category: Biology Source Type: research

Effect of a cooling strategy combining forearm water immersion and a low dose of ice slurry ingestion on physiological response and subsequent exercise performance in the heat
Publication date: Available online 1 February 2020Source: Journal of Thermal BiologyAuthor(s): Daisuke Nakamura, Koji Muraishi, Hiroshi Hasegawa, Mikinobu Yasumatsu, Hideyuki TakahashiAbstractAlthough numerous studies have shown the benefits of cooling strategies for reducing thermal strain and subsequent exercise performance in the heat, none have focused on a combination of external and internal cooling. Therefore, the purpose of the present study was to examine the impact of a cooling strategy combining forearm water immersion and a low dose of ice slurry ingestion on physiological response and subsequent exercise perfo...
Source: Journal of Thermal Biology - February 1, 2020 Category: Biology Source Type: research

Unbalanced thermoregulation in experimental autoimmune encephalitis induced in Lewis rats
Publication date: Available online 30 January 2020Source: Journal of Thermal BiologyAuthor(s): Sylwia Wrotek, Anna Nowakowska, Michał Caputa, Wiesław KozakAbstractThermoregulation in patients suffering from multiple sclerosis (MS) is impaired and may result in either increases or decreases in body temperature. We have found that rat experimental autoimmune encephalitis (EAE), being a model of MS, is associated with body temperature disturbances as well.The purpose of the current study was to examine whether the altered body temperature in EAE-induced rats is due to either a deficit in thermoregulation or a controlled cha...
Source: Journal of Thermal Biology - February 1, 2020 Category: Biology Source Type: research

Editorial Board
Publication date: January 2020Source: Journal of Thermal Biology, Volume 87Author(s): (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - January 26, 2020 Category: Biology Source Type: research

Generalist grasshoppers from thermally variable sites do not have higher thermal tolerance than grasshoppers from thermally stable sites - A study of five populations
Publication date: Available online 23 January 2020Source: Journal of Thermal BiologyAuthor(s): Devin B. Preston, Steven G. JohnsonAbstractThermal tolerance allows many organisms, including insects, to withstand stressful temperatures. Thermal generalists are expected to have higher thermal tolerance than specialists, but the environmental conditions leading to the evolution of a thermal generalist life history are not fully understood. Thermal variability has been put forth as an evolutionary driver of high thermal tolerance, but rarely has this been empirically tested. We used a generalist agricultural pest grasshopper, M...
Source: Journal of Thermal Biology - January 24, 2020 Category: Biology Source Type: research

Critical THI thresholds based on the physiological parameters of lactating dairy cows
Publication date: Available online 22 January 2020Source: Journal of Thermal BiologyAuthor(s): Severino Pinto, Gundula Hoffmann, Christian Ammon, Thomas AmonAbstractThe severity of heat stress conditions in high-yielding dairy cows is currently underestimated. The present study aimed to determine the heat load threshold of the temperature-humidity index (THI) on physiological parameters of lactating Holstein-Friesian cows under a continental climatic zone in Germany. Physiological parameter measurements, such as respiration rate (RR), measured hourly, and heart rate (HR) and rectal temperature (RT), both measured twice dai...
Source: Journal of Thermal Biology - January 23, 2020 Category: Biology Source Type: research

Water temperature affects osmoregulatory responses in gilthead sea bream (Sparus aurata L.)
Publication date: Available online 22 January 2020Source: Journal of Thermal BiologyAuthor(s): Luis Vargas-Chacoff, Francisco J. Arjona, Ignacio Ruiz-Jarabo, Angel García-Lopez, Gert Flik, Juan M. ManceraAbstractSea bream (Sparus aurata Linneaus) was acclimated to three salinity concentrations, viz. 5 (LSW), 38 (SW) and 55psμ (HSW) and three water temperatures regimes (12, 19 and 26 °C) for five weeks. Osmoregulatory capacity parameters (plasma osmolality, sodium, chloride, cortisol, and branchial and renal Na+,K+-ATPase activities) were also assessed. Salinity and temperature affected all of the parameters...
Source: Journal of Thermal Biology - January 23, 2020 Category: Biology Source Type: research

How does Spix's yellow-toothed cavy (Galea spixii Wagler, 1831) face the thermal challenges of the Brazilian tropical dry forest?
Publication date: Available online 22 January 2020Source: Journal of Thermal BiologyAuthor(s): João Paulo Araújo Fernandes de Queiroz, João Batista Freire Souza-Junior, Vanessa Raquel de Morais Oliveira, Leonardo Lelis de Macedo Costa, Moacir Franco de OliveiraAbstractThe aim of this work was to investigate the thermal biology of the Spix's yellow-toothed cavy (Galea spixii) from the hot and dry environment of the Brazilian Caatinga by infrared thermography and biophysical equations. We monitored the rectal temperature, as well as the non-evaporative (radiative and convective pathways) and evaporative ...
Source: Journal of Thermal Biology - January 23, 2020 Category: Biology Source Type: research

The use of internal heart rate loggers in determining cardiac breakpoints of fish
This study aimed to explore the potential use of implantable heart rate loggers to quantify the TAB of Chrysoblephus laticeps, a marine Sparid, following the ECG method protocols. Of the nine experimental fish, only five (56%) returned accurate ƒHmax data. The TAB of successful trials was easily pinpointed 100% of the time and ranged from 18.09 to 20.10 °C. This study therefore provides evidence that implantable heart rate loggers can estimate TAB of fish which can be applied to many marine species. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - January 23, 2020 Category: Biology Source Type: research

Microclimate modelling of beach sand temperatures reveals high spatial and temporal variation at sea turtle rookeries
Publication date: Available online 20 January 2020Source: Journal of Thermal BiologyAuthor(s): Blair P. Bentley, Michael R. Kearney, Scott D. Whiting, Nicola J. MitchellAbstractThe continual development of ecological models and availability of high-resolution gridded climate surfaces have stimulated studies that link climate variables to functional traits of organisms. A primary constraint of these studies is the ability to reliably predict the microclimate that an organism experiences using macroscale climate inputs. This is particularly important in regions where access to empirical information is limited. Here, we contr...
Source: Journal of Thermal Biology - January 21, 2020 Category: Biology Source Type: research

Shifts in hatching date of American crocodile (Crocodylus acutus) in southern Florida
In this study, we examined the relationship between sea surface temperature and average date of hatching for American crocodiles (Crocodylus acutus) over a 37-year period at two nesting sites, Everglades National Park and Florida Power and Light Turkey Point Power Plant site in southern Florida. Our results indicate that hatch dates are shifting 1.5 days earlier every two years and at half that rate for the Turkey Point site, and with every 1 °C degree increase in temperature, hatching occurs about 10 days earlier in the Everglades and 6 days earlier at Turkey Point. Our results on shifting hatch dates for American c...
Source: Journal of Thermal Biology - January 20, 2020 Category: Biology Source Type: research

Short chain fatty acids may improve hepatic mitochondrial energy efficiency in heat stressed-broilers
Publication date: Available online 16 January 2020Source: Journal of Thermal BiologyAuthor(s): Kazem Seifi, Mansour Rezaei, Asad Teimouri Yansari, Mohammad Javad Zamiri, Gholam Hossein Riazi, Reza HeidariAbstractThe present study was conducted to investigate the effects of four dietary fat types and two environmental temperatures on the hepatic mitochondrial energetic in male broilers exposed to heat stress. The birds were kept in two separate rooms at 24 °C or 36 °C from 32 to 42 d of age with four experimental groups in each room. The birds fed on the diets supplemented containing rich sources of long-chain...
Source: Journal of Thermal Biology - January 16, 2020 Category: Biology Source Type: research

Mitochondrial manganese superoxide dismutase from the shrimp Litopenaeus vannamei: Molecular characterization and effect of high temperature, hypoxia and reoxygenation on expression and enzyme activity
In this study, we report the mitochondrial manganese superoxide dismutase (mMnSOD) nucleotide and deduced amino acid sequences and its gene expression in L. vannamei tissues. The deduced protein has 220 amino acids with a signal peptide of 20 amino acids. Expression of mMnSOD was analyzed in hepatopancreas, gills and muscle, where gills had highest expression in normoxic conditions. In addition, shrimp were subjected to high temperature, hypoxia and reoxygenation to analyze the effect on the expression of mMnSOD and SOD activity in mitochondria. High temperature and hypoxia showed a synergistic effect in the up-regulation ...
Source: Journal of Thermal Biology - January 12, 2020 Category: Biology Source Type: research

Comparative study on the responses of broiler chicken to hot and humid environment supplemented with different dietary levels and sources of selenium
Publication date: Available online 10 January 2020Source: Journal of Thermal BiologyAuthor(s): Sagar Dukare, Nasir Akbar Mir, A.B. Mandal, Kapil Dev, Jubeda Begum, Praveen K. Tyagi, J.J. Rokade, Avishek Biswas, Pramod K. Tyagi, S.K. BhanjaAbstractPresent study was carried out with the objective of investigating the role of green synthesized nano Se (GNS) in growth performance, digestibility of minerals, immunity, stress alleviation, antioxidant status, and body Se content of broiler chicken raised under hot and humid environment with respect to market nano Se (MNS) and inorganic Se. The experimental design was 3 ×...
Source: Journal of Thermal Biology - January 11, 2020 Category: Biology Source Type: research

Diel and seasonal variations in the thermal biology of San Cristobal Lava Lizards (Microlophus bivittatus)
Publication date: Available online 10 January 2020Source: Journal of Thermal BiologyAuthor(s): John W. Rowe, David L. Clark, Chelsea E. Martin, Carlos ValleAbstractThermal biology, and therefore energy acquisition and survival, of ectotherms can be affected by diel and seasonal patterns of environmental temperatures. Galápagos Lava Lizards live in seasonal environments that are characterized by a warm and wet period when reproductive activity is maximal, and cooler and drier period. With the use of radiotelemetric techniques to record lizard surface temperatures (Ts), we studied the thermal ecology of the San Crist&...
Source: Journal of Thermal Biology - January 11, 2020 Category: Biology Source Type: research

Early age thermal manipulation on the performance and physiological response of broiler chickens under hot humid tropical climate
Publication date: Available online 9 January 2020Source: Journal of Thermal BiologyAuthor(s): O.E. Oke, E.T. Alo, F.O. Oke, Y.A. Oyebamiji, M.A. Ijaiya, M.A. Odefemi, R.Y. Kazeem, A.A. Soyode, O.M. Aruwajoye, R.T. Ojo, S.M. Adeosun, O.M. OnagbesanAbstractInitial brooding temperature is critical for post-hatch growth of broiler chickens. A study was conducted to investigate the early age thermal manipulation (EATM) on the performance and physiological responses broiler chickens under hot humid tropical climate. A total of 260 unsexed day-old Arbor-acre broiler chicks were assigned to five thermal treatments of brooding temp...
Source: Journal of Thermal Biology - January 10, 2020 Category: Biology Source Type: research

Dietary effects on pelage emissivity in mammals: Implications for infrared thermography
This study highlights that aspects of an animal's life history (e.g. age, sex, diet) may contribute to the emissivity of its pelage. As such, a single emissivity value may be inappropriate for use in infrared thermography across all species or individuals; other aspects of an animal's biology, which may affect emissivity, should also be considered. Best practice should involve measuring emissivity for every individual animal used in thermography studies. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - January 9, 2020 Category: Biology Source Type: research

Functional adaptation rather than ecogeographical rules determine body-size metrics along a thermal cline with elevation in the Chinese pygmy dormouse (Typhlomys cinereus)
Publication date: Available online 3 January 2020Source: Journal of Thermal BiologyAuthor(s): Jifa Cui, Boyu Lei, Chris Newman, Shengnan Ji, Huawei Su, Christina D. Buesching, David W. Macdonald, Youbing ZhouAbstractPhenotypic plasticity is crucial for how organisms respond to variation in their environment, affecting their diversity and distribution, especially in the light of rapid environmental change. Ecogeographical rules predict an association between specific adaptive morphological and physiological traits with cooler conditions due to higher latitude, elevation, or climate change. Such ecogeographical effects are o...
Source: Journal of Thermal Biology - January 5, 2020 Category: Biology Source Type: research

The efficacy of antibiotics in reducing morbidity and mortality from heatstroke – A systematic review
Publication date: Available online 3 January 2020Source: Journal of Thermal BiologyAuthor(s): Edward Walter, Oliver GibsonAbstractSevere hyperthermia, for example, classical heatstroke or exertional heatstroke from heatwaves or exercise respectively, or from drug ingestion or other non-infective pyrogens, is associated with a high mortality and morbidity, which may be chronic or permanent. Abolition of lipopolysaccharide, from gram-negative intestinal bacteria translocating into the systemic circulation via an intestinal wall rendered permeable from the hyperthermia, reduces the adverse effects, suggesting that antibiotics...
Source: Journal of Thermal Biology - January 5, 2020 Category: Biology Source Type: research

Molecular characterization of eight ATP-dependent heat shock protein transcripts and their expression profiles in response to stresses in the spruce budworm, Choristoneura fumiferana (L.)
Publication date: Available online 3 January 2020Source: Journal of Thermal BiologyAuthor(s): Guoxing Quan, Jun Duan, Fick William, Jean-Noël CandauAbstractHeat shock proteins (HSPs) greatly contribute to insect stress tolerance and enhance survival and adaptation in severe environmental conditions. To investigate the potential roles of HSPs in the spruce budworm, Choristoneura fumiferana (L.), an important native pest of forests in North America, we found eight ATP-dependent HSP transcripts (CfHSPs). Based on molecular characteristics, the identified HSP genes were classified into HSP70 and HSP90 families, and phylog...
Source: Journal of Thermal Biology - January 3, 2020 Category: Biology Source Type: research

Effect of heat treatment on pre-stocking of Turkey eggs and its impact on incubation and hatching
The objective of this study was to determine whether heat treatment (37.5 °C) prior to incubation would improve hatching rates. We also determined the heat-exposure time necessary to improve productivity. We stored 5,376 Nicholas pedigree eggs, aged between 40 and 51 weeks, for seven days. These eggs were distributed in three groups: groups 1 and 2 received 4 and 6 h of heat treatment, respectively; group 3 was used as control (no heat treatment, remaining at 17 °C). After heat treatment, the eggs were stored for 7 days at 17 °C, together with eggs from the control group. We found significant variation ...
Source: Journal of Thermal Biology - December 31, 2019 Category: Biology Source Type: research

Dietary sodium butyrate ameliorated the blood stress biomarkers, heat shock proteins, and immune response of Nile tilapia (Oreochromis niloticus) exposed to heat stress
Publication date: Available online 30 December 2019Source: Journal of Thermal BiologyAuthor(s): Mahmoud A.O. Dawood, Nabil M. Eweedah, Zizy I. Elbialy, Amr I. AbdelhamidAbstractThe present study investigated the effects of sodium butyrate (SB) on the growth performance, histomorphology, immune response, and stress related markers of Nile tilapia subjected to heat stress. SB was incorporated at 0, 0.5, 1, 1.5, and 2 g per kg diet and fed to fish for 8 weeks. The obtained results revealed significantly improved growth performance with a decreased feed conversion ratio in the fish fed SB (P 
Source: Journal of Thermal Biology - December 31, 2019 Category: Biology Source Type: research

Temperature-related heart rate in water and air and a comparison to other temperature-related measures of performance in the fiddler crab Leptuca pugilator (Bosc 1802)
Publication date: Available online 30 December 2019Source: Journal of Thermal BiologyAuthor(s): Jeffrey S. Levinton, Nils Volkenborn, Samuel Gurr, Kelly Correal, Sebastian Villacres, Rui Seabra, Fernando P. LimaAbstractPerformance in poikilotherms is known to be sensitive to temperature, often with a low-sloping increase with temperature to a peak, and a steep decline with increasing temperature past the peak. We complemented past measures of performance by measuring heartbeat rates of the fiddler crab Leptuca pugilator in water and in air as a function of a range of temperatures previously shown to affect other measures o...
Source: Journal of Thermal Biology - December 31, 2019 Category: Biology Source Type: research

Influence of a high-temperature programme on serum, urinary and sweat levels of selenium and zinc
The objective of this study was to observe the effects of heat on the concentration of Se and Zn, elements related to antioxidant systems.MethodsTwenty-nine subjects voluntarily participated in this study. They were divided into a control group (CG; n = 14) and an experimental group (EG; n = 15). All of them underwent two incremental tests until exhaustion in normothermia (22 °C, 20–40%RH) and hyperthermia (42 °C, 20–40%RH). EG experienced nine sessions of repeated heat exposure at high temperatures (100 °C, 20%RH) for three weeks (HEHT). After the intervention, the initial measurement...
Source: Journal of Thermal Biology - December 31, 2019 Category: Biology Source Type: research

Does dietary supplementation with phytases affect the thermoregulatory and behavioral responses of pullets in a tropical environment?
Publication date: Available online 30 December 2019Source: Journal of Thermal BiologyAuthor(s): Thais Lucas de Sena, Silvana Cavalcante Bastos Leite, Angela Maria de Vasconcelos, Maria Mislane Rodrigues Bezerra, Cláudia Goulart de Abreu, Maria Rogervânia Silva de Farias, Robson Mateus Freitas SilveiraAbstractDietary supplementation of two types of phytases (fungal and bacterial) with different dosages (300 and 900 FTUs) was evaluated in the thermoregulatory and behavioral responses of replacement pullets in a tropical environment. 288 Hy-Line White laying birds with a mean weight of 639.60 ± 6.05 ...
Source: Journal of Thermal Biology - December 30, 2019 Category: Biology Source Type: research

Lettuce plant growth and tipburn occurrence as affected by airflow using a multi-fan system in a plant factory with artificial light
In this study, three airflow patterns were evaluated: T1, the front and back sides of the culture bed were air inlets; T2, the front side was an air inlet and the backside was an air outlet; and T3, both the front and back sides were air outlets. A culture bed without MFS was used as a control (T4). Lettuce growth and tipburn occurrence were evaluated and leaf boundary layer resistance (1/gbv), sensible heat flux (Sh), and latent heat flux (Lh) of lettuce plants were estimated. The airflow pattern in T1 improved the air velocity (Va) by an average of 0.75 m s-1 and a variation coefficient of 65%. The 1/gbv decreased si...
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

The highest kingdom of Anolis: Thermal biology of the Andean lizard Anolis heterodermus (Squamata: Dactyloidae) over an elevational gradient in the Eastern Cordillera of Colombia
Publication date: Available online 28 December 2019Source: Journal of Thermal BiologyAuthor(s): Miguel A. Méndez-Galeano, R. Felipe Paternina-Cruz, Martha L. Calderón-EspinosaAbstractVertebrate ectotherms may deal with changes of environmental temperatures by behavioral and/or physiological mechanisms. Reptiles inhabiting tropical highlands face extreme fluctuating daily temperatures, and extreme values and intervals of fluctuations vary with altitude. Anolis heterodermus occurs between 1800 m to 3750 m elevation in the tropical Andes, and is the Anolis species found at the highest altitude known. We eval...
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

An in vivo and in silico analysis of novel variation in TMBIM6 gene affecting cardiopulmonary traits of Indian goats
Publication date: Available online 28 December 2019Source: Journal of Thermal BiologyAuthor(s): Lipi Lekha Swain, Chinmoy Mishra, Siddhanth Sekhar Sahoo, Gangadhar Nayak, Sukanta Kumar Pradhan, Smruti Ranjan Mishra, Mahesh DigeAbstractTransmembrane Bax Inhibitor Motif-containing 6 (TMBIM6) gene acts as calcium leak channel and negatively regulates autophagy and autophagosome formation. The TMBIM6 gene was amplified and searched for variation in three different goat populations (i.e. Black Bengal, Ganjam and Raighar) of Odisha state of the India. The result indicated two substitutions i.e. 55th position (C55T) and 95th posi...
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

Effects of cold stress on juvenile Piaractus mesopotamicus and the mitigation by β-carotene
This study investigated the effects of cold stress on morphometrical and hematological biomarkers, energy metabolism, and oxidative stress in different tissues of P. mesopotamicus, and the protective role of β-carotene. Fish were fed with a control diet (CD) and the same diet supplemented with 105 mg/kg β-carotene (BD) for 60 days. After the feeding trial, fish fed CD or BD diets were exposed to control (24 °C) and low temperature (14 °C) for 24 h. Fish (CD and BD) exposed to thermal stress showed lower hepatosomatic index. The hemoglobin increased only in CD-fed fish exposed to 14 °C. Incre...
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

Thermoregulatory differences in African mole-rat species from disparate habitats: Responses and limitations
This study provides evidence of the variation and limitations of thermo-physiological mechanisms for 3 mol-rat species relative to their habitats. Information on physiological adaptations to particular habitats may inform predictive modelling of species movements, declines, and extinctions in response to a changing environment, such as climate change. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

Unravelling the effects of elevated temperature on the physiological energetics of Bellamya bengalensis
Publication date: Available online 27 December 2019Source: Journal of Thermal BiologyAuthor(s): Sritama Baag, Sayantan Mahapatra, Sumit MandalAbstractTemperature is one of the key environmental factors affecting the eco-physiological responses of living organisms and is considered one of the utmost crucial factors in shaping the fundamental niche of a species. The purpose of the present study is to delineate the physiological response and changes in energy allocation strategy of Bellamya bengalensis, a freshwater gastropod in the anticipated summer elevated temperature in the future by measuring the growth, body conditions...
Source: Journal of Thermal Biology - December 29, 2019 Category: Biology Source Type: research

Diurnal change in psychological and physiological responses to consistent relative humidity
Publication date: Available online 25 December 2019Source: Journal of Thermal BiologyAuthor(s): Naoshi Kakitsuba, Qimin Chen, Yoshinori KomatsuAbstractDiurnal changes in physiological and psychological responses to consistent relative humidity (RH) conditions were investigated in the present study. Lightly clothed six male and six female subjects participated in the first experiment at 40% and 50% RH, and seven male and seven female subjects participated in the second experiment at 60%, 70%, and 80% RH. Both experiments were conducted at 28 °C air temperature (Ta) from 9:00–18:30. Skin temperatures, local heat ...
Source: Journal of Thermal Biology - December 26, 2019 Category: Biology Source Type: research

Genomic regions and pathways associated with thermotolerance in layer-type strain Taiwan indigenous chickens
In conclusion, the identified SNPs of candidate genes provide insights into the potential mechanisms underlying physiological responses to acute heat stress in chickens. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - December 26, 2019 Category: Biology Source Type: research

The effects of fire on the thermal environment of sagebrush communities
Publication date: Available online 24 December 2019Source: Journal of Thermal BiologyAuthor(s): Christopher R. Anthony, Christian A. Hagen, Katie M. Dugger, R. Dwayne ElmoreAbstractThermal heterogeneity provides options for organisms during extreme temperatures that can dictate their fitness. Sagebrush (Artemisia spp.) communities exhibit vegetation heterogeneity that creates thermal variation at fine spatial scales. However, fire can change vegetation and thereby variation within the thermal environment of sagebrush communities. To describe spatial and temporal thermal variation of sagebrush communities following wildfire...
Source: Journal of Thermal Biology - December 26, 2019 Category: Biology Source Type: research

Thermal comfort of sows in free-range system in Brazilian Savanna
Publication date: Available online 25 December 2019Source: Journal of Thermal BiologyAuthor(s): João Victor do Nascimento Mós, Sheila Tavares Nascimento, Luci Sayori Murata, Vinicius Machado dos Santos, Antonio José Steidle Neto, Evandro Menezes de Oliveira, Áquila da Silva Lisboa, Luana de Freitas SilvaAbstractThe aim of this work was to evaluate the thermal comfort of sows in a free-range system in the Brazilian Savanna, based on behavior observation, availability of shading resources, meteorological and physiological variables. The sows were analyzed in the gestation sector at Água Lim...
Source: Journal of Thermal Biology - December 26, 2019 Category: Biology Source Type: research

Latitudinal comparison of the thermal biology in the endemic lizard Liolaemus multimaculatus
Publication date: Available online 23 December 2019Source: Journal of Thermal BiologyAuthor(s): Oscar Aníbal Stellatelli, Laura E. Vega, Carolina Block, Camila Rocca, Patricio Juan Bellagamba, Félix Benjamín CruzAbstractThermoregulation in ectotherms may be modulated by climatic variability across geographic gradients. Environmental temperature varies along latitudinal clines resulting in heterogeneous thermal resource availability, which generally induces ectotherms to use compensatory mechanisms to thermoregulate. Lizards can accommodate to ambient temperature changes through a combination of adaptiv...
Source: Journal of Thermal Biology - December 24, 2019 Category: Biology Source Type: research

Repeated hyperthermia exposure increases circulating Brain Derived Neurotrophic Factor levels which is associated with improved quality of life, and reduced anxiety: A randomized controlled trial.
ConclusionA 10-week programme consisting of repeated exposure to hyperthermia resulted in a significantly higher increase of circulating BDNF compared to a programme consisting of intermittent light intensity exercise. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - December 20, 2019 Category: Biology Source Type: research

Daily rumination time of lactating dairy cows under heat stress conditions
Publication date: Available online 18 December 2019Source: Journal of Thermal BiologyAuthor(s): Theresa Müschner-Siemens, Gundula Hoffmann, Christian Ammon, Thomas AmonAbstractThe dairy industry in regions with moderate climates, such as Central Europe, will be increasingly challenged in the future by climate change. The problem of heat stress will especially affect dairy husbandry in naturally ventilated barns (NVB). The approach of the study was to determine a heat stress threshold of the average daily temperature-humidity index (THI) that results in changes in the daily rumination time (RT) of lactating, high-yield...
Source: Journal of Thermal Biology - December 19, 2019 Category: Biology Source Type: research