Consulta: subjectFacets:"Thermoregulation"
Registros recuperados: 38
Data/hora: 20/05/2024 16:32:51

A decision-tree-based model for evaluating the thermal comfort of horses
Provedor de dados: 63
Autores: Maia,Ana Paula de Assis; Oliveira,Stanley Robson de Medeiros; Moura,Daniella Jorge de; Sarubbi,Juliana; Vercellino,Rimena do Amaral; Medeiros,Brenda Batista Lemos; Griska,Paulo Roberto.
Thermal comfort is of great importance in preserving body temperature homeostasis during thermal stress conditions. Although the thermal comfort of horses has been widely studied, there is no report of its relationship with surface temperature (T S). This study aimed to assess the potential of data mining techniques as a tool to associate surface temperature with thermal comfort of horses. T S was obtained using infrared thermography image processing. Physiological and environmental variables were used to define the predicted class, which classified thermal comfort as "comfort" and "discomfort". The variables of armpit, croup, breast and groin T S of horses and the predicted classes were then subjected to a machine learning process. All variables in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feature selection methods; Data mining; Surface temperature; Infrared thermography; Thermoregulation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600001

A influência dos ritmos circadianos no metabolismo da serpente Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030
Provedor de dados: 3
Autores: Cruz, José Geraldo Pereira da; FURB.
A atividade termorreguladora conduziu a uma busca extensiva para o entendimento das correlações entre as variáveis fisiológicas, incluindo as funções metabólicas e a temperatura corporal. Frequentes observações mostram que algumas serpentes podem se aquecer, sendo este aumento de temperatura independente da temperatura ambiente, indicando a termorregulação bem sucedida. Bothrops jararaca foram expostas a dois ambientes com diferentes temperaturas (20 e 30oC) durante três semanas, sendo mensuradas a temperatura corporal e o consumo de oxigênio. O aumento da temperatura corporal e consumo de oxigênio de Bothrops jararaca ocorreram na fase de escuro do fotoperíodo, consistente para espécies noturnas. Entretanto, antecedendo a fase de escuro, as serpentes em...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas consumo de oxigênio; Répteis; Termorregulação oxygen consumption; Reptile; Thermoregulation.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030

Adaptive parameters and thermal comfort of postpartum ewes fed on concentrate supplementation in grazing system
Provedor de dados: 2
Autores: Rocha, Ronne-von Ribeiro da; Universidade Federal do Piauí; Oliveira, Petrônio Batista de; Universidade Federal do Piauí; Nunes, Amaury Guimarães; Universidade Federal do Piauí; Silva, Tairon Pannunzio Dias e; Universidade de São Paulo; Pereira, Alécio Matos; Universidade Federal do Piauí; Torreão, Jacira Neves da Costa; Colégio Técnico de Bom Jesus.
Current analysis evaluated adaptive parameters and thermal comfort of postpartum ewes fed on concentrate supplementation in grazing system. Thirty lactating pluriparous sheep, 16 Santa Inês (SI) and 14 Morada Nova (MN) were used. Physiological parameters such as respiratory rate (RR), heart rate (HR) and rectal temperature (RT) were measured, in that order, with the animals at rest in the morning (6:00-7:00 am) and in the afternoon (1:00-2:00 pm), respectively, every seven days, with 10 samples. A significant effect (p &amp;lt; 0.05) for RR and HR was reported in the strain. Similar behavior was reported for RR between the breeds where MN sheep had high adaptability. Supplementation levels of 0.5 and 1.5% influenced (p &amp;lt; 0.05) RR which was stronger...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental factors; Heat stress; Nutrition; Thermoregulation.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22823

Association between the increase in brain temperature and physical performance at different exercise intensities and protocols in a temperate environment
Provedor de dados: 56
Autores: Kunstetter,A.C.; Wanner,S.P.; Madeira,L.G.; Wilke,C.F.; Rodrigues,L.O.C.; Lima,N.R.V.
There is evidence that brain temperature (Tbrain) provides a more sensitive index than other core body temperatures in determining physical performance. However, no study has addressed whether the association between performance and increases in Tbrain in a temperate environment is dependent upon exercise intensity, and this was the primary aim of the present study. Adult male Wistar rats were subjected to constant exercise at three different speeds (18, 21, and 24 m/min) until the onset of volitional fatigue. Tbrain was continuously measured by a thermistor inserted through a brain guide cannula. Exercise induced a speed-dependent increase in Tbrain, with the fastest speed associated with a higher rate of Tbrain increase. Rats subjected to constant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brain cortex; Fatigue; Hyperthermia; Speed; Thermoregulation; Treadmill running.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000800679

Behavioral ecology of Heteragrion consors Hagen (Odonata, Megapodagrionidae): a shade-seek Atlantic forest damselfly
Provedor de dados: 92
Autores: Loiola,Geovanni Ribeiro; De Marco,Paulo.
Behavioral ecology of Heteragrion consors Hagen (Odonata: Megapodagrionidae): a shade-seek Atlantic forest damselfly. The intensity of the inter and intra-sexual selection can affect male behavioral traits as territorial fidelity and aggressiveness allowing the existence of different strategies. However, its differential success could be affected by environmental - as the diel variation in temperature - and physiological constrains - as the variation in thermoregulatory abilities. In this context, we present a behavioral analysis of Heteragrion consors (Zygoptera, Megapodagrionidae) trying to characterize its mating system, diel activity pattern, temporal budget, territoriality and reproductive biology. These data were obtained based on field observations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mating systems; Reproductive biology; Temporal budget; Thermoregulation; Territoriality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000300010

Broiler surface temperature distribution of 42 day old chickens
Provedor de dados: 63
Autores: Nääs,Irenilza de Alencar; Romanini,Carlos Eduardo Bites; Neves,Diego Pereira; Nascimento,Guilherme Rodrigues do; Vercellino,Rimena do Amaral.
Broiler chickens in Brazil are generally reared from 1 to 42 days when they are exposed to procedures such as fasting, harvesting, crating and transport to slaughter. Maintaining homeostasis is of great importance for broiler survival under harsh environment especially prior to slaughter. Heat loss varies in the distinct parts of the body during the growth period, and it is related to the air temperature of the environment and to the amount of feather covering. This research aimed to study the surface temperature distribution using infrared thermographic image processing to characterize 42 day old broiler chicken surface temperature prior to slaughter. Broilers were reared for 42 days and prior to harvest and transport to slaughter the infrared surface...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermal comfort; Heat loss; Thermoregulation; Infrared thermography.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500001

Comparison of sweat rate during graded exercise and the local rate induced by pilocarpine
Provedor de dados: 56
Autores: Vimieiro-Gomes,A.C.; Magalhães,F.C.; Amorim,F.T.; Machado-Moreira,C.A.; Rosa,M.S.; Lima,N.R.V.; Rodrigues,L.O.C.
Centrally stimulated sweat rate produced by graded exercise until exhaustion was compared to the local sweat rate induced by pilocarpine, often used as a sweating index for healthy individuals. Nine young male volunteers (22 ± 4 years) were studied in temperate environment in two situations: at rest and during progressive exercise with 25 W increases every 2 min until exhaustion, on a cycle ergometer. In both situations, sweating was induced on the right forearm with 5 ml 0.5% pilocarpine hydrochloride applied by iontophoresis (1.5 mA, 5 min), with left forearm used as control. Local sweat rate was measured for 15 min at rest. During exercise, whole-body sweat rate was calculated from the body weight variation. Local sweat rate was measured from the time...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sweat rate; Graded exercise test; Pilocarpine; Thermoregulation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700017

Does gestation or feeding affect the body temperature of the golden lancehead, Bothrops insularis (Squamata: Viperidae) under field conditions?
Provedor de dados: 103
Autores: Bovo,Rafael P.; Marques,Otavio A. V.; Andrade,Denis V.
Temperature affects physiological performance in reptiles and, therefore, body temperature (Tb) control is argued to have an important adaptive value. Alterations in Tb due to transient changes in physiological state, as during digestion or gestation, are often linked to the potential benefits of a more precise Tb regulation. However, such thermoregulatory responses in nature remain controversial, particularly for tropical snakes. Herein, we measured Tb of the golden lanceheads, Bothrops insularis (Amaral, 1921), at Queimada Grande Island, southeastern Brazil, to test for alteration in selected body temperatures associated with feeding or gestation. We found no evidence that postprandial or gravid snakes selected for higher Tb indicating that, under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestion; Gravid females; Postprandial thermophilic response; Snake; Thermoregulation; Neotropics.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600020

Effect of concentrate supplementation and time scales of evaluation on behavioral and physiological responses of pregnant ewes on grazing system
Provedor de dados: 2
Autores: Silva, Tairon Pannunzio Dias e; Marques, Carlo Aldrovandi Torreão; Torreão, Jacira Neves da Costa; Bezerra, Leílson Rocha; Araujo, Marcos Jácome de; Lima, Lucas Almeida.
This study was realized to evaluate the effect of concentrate supplementation and time scales of evaluation on behavioral and physiological responses of pregnant ewes on grazing system. The experimental design was a randomized 2 x 2 x 3 factorial arrangement (two breeds: Morada and Santa Inês; two concentrate supplementation levels: 0.5 and 1.5% of body weight; and three time scales of evaluation: 10, 20 and 30 minutes) with six replicates per treatment. The physiological parameters were influenced by period of the day and breeds, with higher values in the afternoon to Santa Inês ewes. Also, influence of concentrate supplementation was found between the breeds with greater values in Santa Inês ewes. But, it did not alter the physiological parameters among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Behavior; Native ewes; Semi-arid conditions; Thermoregulation.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/28748

Effect of Thermal Embryonic Manipulation on the Quality of Male and Female Broiler Meat Submitted to Thermal Stress Pre-Slaughter
Provedor de dados: 89
Autores: Fernandes,JIM; Santos,TC; Kaneko,IN; Horn,D; Leyter,JR; Pasa,CLB.
ABSTRACT Adverse environmental conditions during rearing may negatively affect productivity and meat quality of the modern fast-growing broiler strains. Temperature manipulation during sensitive embryonic development periods may affect broilers' physiological responses to environmental conditions during rearing on commercial farms. The objective of this trial was to evaluate the effect of temperature manipulation during incubation and breeder age on the meat quality of male and female broilers submitted to heat stress during the pre-slaughter period. In this experiment, 1280 broiler chicks were distributed according to a completely randomized experimental design in a 2x2x2 factorial arrangement. Treatments consisted of two breeder ages (30 and 60 weeks),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptation; Epigenetic; Incubation; Thermoregulation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200343

Effects of thermal environment and supplementation levels on the physiological parameters of moxotó goats in confined and semi-confined rising systems
Provedor de dados: 70
Autores: Furtado,Dermeval A.; Gomes,Carlos A. V.; Medeiros,Ariosvaldo N.; Pimenta Filho,Edgard C.; Júnior,Valdi L.
The objective of this work was to determine the effect of environmental variables and supplementation levels on physiological parameters of Moxotó goats in confined and semi-confined rising systems, in the Brazilian semi-arid region. The semi-confined individuals were kept on a grass based diet during the day and arrested in the end of the afternoon. The confined animals were kept in a management center, receiving two diets composed by forage cactus and maniçoba hay into two different levels (0.5 and 1.5% of the body weight). Inside the management center and in the external environment the environmental comfort parameters were set high during the afternoon period characterizing a situation of thermal discomfort for the animals. During the morning the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermoregulation; Environmental variables; Native goat race; Semi-arid.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162008000300001

Energetics, thermoregulation and torpor in the Chilean mouse-opossum Thylamys elegans (Didelphidae)
Provedor de dados: 97
Autores: Bozinovic,Francisco; RuÍz,Gricelda; CortÉs,Arturo; Rosenmann,Mario.
In this paper we studied the energetic expenditure and thermoregulation of the Chilean mouse-opossum Thylamys elegans (Dielphidae) a nocturnal small marsupial, endemic of southern South America. We studied their standard energetic and determined whether they exhibit shallow daily torpor or deep prolonged torpor as a function of ambient temperature and food availability. Thylamys elegans partially supports the hypothesis that Neotropical marsupials have somewhat a higher basal metabolic rate (BMR) and thermal conductance (Cm) than Australian ones. In fact, BMR was higher but Cm was lower than expected for their body mass. The higher mass-independent BMR of the Chilean mouse-opossum may be explained by its insectivorous food habits and its low Cm by its...
Tipo: Journal article
Palavras-chave: Chile; Marsupials; Energetic; Thermoregulation; Facultative torpor.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200003

Evaluation of covering materials in individual shelters and its effects on physiological responses and performance of dairy calves
Provedor de dados: 70
Autores: Fonseca,Patrícia C. de F; Almeida,Eduardo A. de; Passini,Roberta.
In Tropical regions, the animal performance is often affected by climate conditions. This study aimed to evaluate covering materials in individual shelters, normally used to house dairy calves, and its influence on the calves physiology and performance. The design used was completely randomized, with a 2x3 factorial arrangement to compare the averages of 5% through the Tukey's test, i.e., both genders- and three types of covering in the shelters (Z - zinc; AC - asbestos cement; and WPAC - white-painted asbestos cement). Parameters evaluated included daily weight gain (DWG), dry matter intake (DMI), feed conversion (FC), rectal temperature (RT), and respiratory frequency (RF). Results showed significant differences (P &lt; 0.05) among males (1.04kg/day) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermoregulation; Weight gain; Feed conversion.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600005

Heat Requirements of Two Layer Strains Placed on Different Dates
Provedor de dados: 89
Autores: Gencoglan,S.
ABSTRACT This study was conducted to calculate the heat requirements of Hy-line W-36 and Hy-line W-98 layer chicks placed on different dates, and to select one of these strains based on heat requirements and egg prices. An environmentally-controlled, mechanically-ventilated, and fan and pad-cooled house with a capacity of 94,500 chicks was designed. Based on the identification of September as the month with the highest egg prices, placement dates were selected (16th of March, 1st of April, 16th of April, 23rd of April and 1st of May) to coincide with economic egg weight in that month. The heat requirements for a rearing period of 35days of both evaluated strains starting on the above-mentioned dates were calculated using heat and moisture balance method...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heat and moisture production; Heat balance; Temperature control; Thermoregulation; Weibull method.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300471

Heat storage rate and acute fatigue in rats
Provedor de dados: 56
Autores: Rodrigues,L.O.C.; Oliveira,A.; Lima,N.R.V.; Machado-Moreira,C.A.
Thermal environmental stress can anticipate acute fatigue during exercise at a fixed intensity (%VO2max). Controversy exists about whether this anticipation is caused by the absolute internal temperature (Tint, ºC), by the heat storage rate (HSR, cal/min) or by both mechanisms. The aim of the present study was to study acute fatigue (total exercise time, TET) during thermal stress by determining Tint and HSR from abdominal temperature. Thermal environmental stress was controlled in an environmental chamber and determined as wet bulb globe temperature (ºC), with three environmental temperatures being studied: cold (18ºC), thermoneutral (23.1ºC) or hot (29.4ºC). Six untrained male Wistar rats weighing 260-360 g were used. The animals were submitted to...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Thermoregulation; Exercise; Fatigue; Heat storage rate.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000100018

Hemodynamic and thermoregulatory effects of xylazine-ketamine mixture persist even after the anesthetic stage in rats
Provedor de dados: 45
Autores: Picollo,C.; Serra,A.J.; Levy,R.F.; Antonio,E.L.; Santos,L. dos; Tucci,P.J.F.
The xylazine-ketamine mixture (KX) is an anesthetic approach commonly administered to assess cardiovascular function in rodents. This study aimed to examine if the cardiovascular and thermoregulatory effects of KX could persist after the anesthetic state ceased in rats. Male Wistar rats were anesthetized with K (50mg/kg) X (10mg/kg) through the intra-peritoneal route. Hemodynamic and thermoregulatory repercussions were evaluated in animals in awake state, during an anesthetic depth and after complete recovery of anesthetized state. KX was efficient to significantly induce deep anesthesia in all rats after 10min. A complete recovery of anesthetized state was observed only after 210min. Compared with preanesthetic state and control animals that received no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anesthesia; Hypotension; Xylazine-ketamine; Hemodynamics; Thermoregulation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000400011

HSF1 and HSPA6 as functional candidate genes associated with heat tolerance in Angus cattle
Provedor de dados: 96
Autores: Baena,Marielle Moura; Tizioto,Polyana Cristiane; Meirelles,Sarah Laguna Conceição; Regitano,Luciana Correia de Almeida.
ABSTRACT The purpose of this study was to access and characterize single nucleotide polymorphisms (SNP) located within the HSF1 and HSPA6 candidate genes for adaptability in Angus breed raised in subtropical climate. Samples of DNA from 20 animals representing extreme phenotypes for adaptability traits were obtained. Sequence variations in the candidate genes were described by sequencing target regions. We identified 12 SNP located in the HSF1 gene. Moreover, four of the six SNP found in the HSPA6 gene cause amino acid substitutions in protein-coding regions. We also identified a representative SNP (called tag SNP) in a region of the HSF1 gene with high linkage disequilibrium (r2 = 0.87) that may represent 11 SNP located in this gene. Minor allele...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Angus; Molecular markers; Thermoregulation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100402

Hypertension is associated with greater heat exchange during exercise recovery in a hot environment
Provedor de dados: 56
Autores: Fonseca,S. F.; Teles,M. C.; Ribeiro,V. G. C.; Magalhães,F. C.; Mendonça,V. A.; Peixoto,M. F. D.; Leite,L. H. R.; Coimbra,C. C.; Lacerda,A. C. R.
Individuals with systemic arterial hypertension have a higher risk of heat-related complications. Thus, the aim of this study was to examine the thermoregulatory responses of hypertensive subjects during recovery from moderate-intensity exercise performed in the heat. A total of eight essential hypertensive (H) and eight normotensive (N) male subjects (age=46.5±1.3 and 45.6±1.4 years, body mass index=25.8±0.8 and 25.6±0.6 kg/m2, mean arterial pressure=98.0±2.8 and 86.0±2.3 mmHg, respectively) rested for 30 min, performed 1 h of treadmill exercise at 50% of maximal oxygen consumption, and rested for 1 h after exercise in an environmental chamber at 38°C and 60% relative humidity. Skin and core temperatures were measured to calculate heat exchange...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypertension; Hot Environment; Thermoregulation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001201122

Impact of immunological state on eco-physiological variables in one of the southernmost lizards in the world
Provedor de dados: 42
Autores: DURAN,FERNANDO; BORETTO,JORGELINA M.; FERNÁNDEZ,JIMENA B.; MOLINA,MORA IBÁÑEZ; MEDINA,MARLIN S.; IBARGÜENGOYTÍA,NORA R.
Abstract:  The immune state is an essential component of survival as it directly influences physiological performance and health status. Variation in the leukocyte profile, a significantly increase in body temperature, and a detriment of the eco-physiological performance are among the possible consequences of an unhealthy state. In this study we analyse and discuss how field body temperature, preferred body temperature, the speed for sprint and long runs, locomotor stamina, and body condition can be affected by the immunological state (i.e. leukocyte profile) in a wild population of Liolaemus sarmentoi. Juveniles and adult males with a high percentage of eosinophils, basophils, and a low percentage of monocytes preferred higher body temperatures in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body condition; Leukocyte profile; Liolaemus sarmientoi; Locomotor performance; Thermoregulation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700608

Influence of structural habitat use on the thermal ecology of Gonatodes humeralis (Squamata: Gekkonidae) from a transitional forest in Maranhão, Brazil
Provedor de dados: 103
Autores: Miranda,Jivanildo P.; Ricci-Lobão,Andréa; Rocha,Carlos Frederico D.
We studied the structural habitat use and the thermal ecology of Gonatodes humeralis (Guichenot, 1855) in São Luís, Maranhão, Brazil, to examine intersexual differences in the use of perch features and to simultaneously analyze reciprocal differences on thermal ecology between the sexes. Gonatodes humeralis body temperature was strongly correlated with environmental temperatures (air and substrate), but air temperature had an additional effect on the males' body temperatures after removing the effect of the substrate temperature. Males and females differed significantly in perch height use above ground (males perched higher) but the sexes did not differ in the trunk perimeter used. Gonatodes humeralis tended to use the larger tree trunks available in its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gecko; Temperature; Intersexual differences; Microhabitat; Thermoregulation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100006

Intraspecific variation in a physiological thermoregulatory mechanism: the case of the lizard Liolaemus tenuis (Liolaeminae)
Provedor de dados: 97
Autores: VIDAL,MARCELA A; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA.
The interspecific variation of heating rates in Liolaemus lizards, suggests an adaptive value of this physiological thermoregulatory mechanism, which would allow lizards to cope with the environmental thermal restrictions, imposed to behavioral thermoregulation. This trend has barely been tested at intraspecific level, and here we explore if intraspecific variation in heating rates occurs in Liolaemus tenuis, a relative widely distributed species from central Chile. We test the hypothesis that heating rates are related to the thermal environmental conditions at which populations are exposed, by comparing the heating rates of three populations (from a latitudinal range), which inhabit under different thermal conditions. Additionally, we explore if the...
Tipo: Journal article
Palavras-chave: Geographic variation; Sexual variation; Thermoregulation.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000200002

Involvement of the TRPV1 channel in the modulation of spontaneous locomotor activity, physical performance and physical exercise-induced physiological responses
Provedor de dados: 56
Autores: Hudson,A.S.R.; Kunstetter,A.C.; Damasceno,W.C.; Wanner,S.P.
Physical exercise triggers coordinated physiological responses to meet the augmented metabolic demand of contracting muscles. To provide adequate responses, the brain must receive sensory information about the physiological status of peripheral tissues and organs, such as changes in osmolality, temperature and pH. Most of the receptors involved in these afferent pathways express ion channels, including transient receptor potential (TRP) channels, which are usually activated by more than one type of stimulus and are therefore considered polymodal receptors. Among these TRP channels, the TRPV1 channel (transient receptor potential vanilloid type 1 or capsaicin receptor) has well-documented functions in the modulation of pain sensation and thermoregulatory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Afferent; Capsaicin; Hyperthermia; Metabolism; Physical activity; Thermoregulation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000600301

Luteal phase of the menstrual cycle increases sweating rate during exercise
Provedor de dados: 56
Autores: Garcia,A.M.C.; Lacerda,M.G.; Fonseca,I.A.T.; Reis,F.M.; Rodrigues,L.O.C.; Silami-Garcia,E.
The present study evaluated whether the luteal phase elevation of body temperature would be offset during exercise by increased sweating, when women are normally hydrated. Eleven women performed 60 min of cycling exercise at 60% of their maximal work load at 32ºC and 80% relative air humidity. Each subject participated in two identical experimental sessions: one during the follicular phase (between days 5 and 8) and the other during the luteal phase (between days 22 and 25). Women with serum progesterone &gt;3 ng/mL, in the luteal phase were classified as group 1 (N = 4), whereas the others were classified as group 2 (N = 7). Post-exercise urine volume (213 ± 80 vs 309 ± 113 mL) and specific urine gravity (1.008 ± 0.003 vs 1.006 ± 0.002) changed (P &lt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermoregulation; Sweating rate; Exercise; Menstrual cycle; Body temperature.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900014

Metabolic rates and thermoregulatory characteristics of Akodon azarae (Rodentia: Sigmodontinae)
Provedor de dados: 97
Autores: ANTINUCHI,C. DANIEL; BUSCH,CRISTINA.
In this work, we evaluated the energetic status, activity daily metabolic rate, thermoregulatory capacity and the existence of torpor in Akodon azarae (Fisher 1829). Basal metabolic rate (BMR) was similar to the expected value from Kleiber´s, and also according to the BMR of phylogenetically related species. No statistical difference in BMR between sexes was detected. For both males and females, activity daily metabolic rate was 235 % of BMR. Body temperature was not statistically different, neither at different ambient temperatures nor between sexes. In the thermoneutral zone, body temperature was 36.1 ± 1.5 °C. Thermal conductance was lower than the expected for mammals whereas thermoregulatory capacity was 136 % of the expected. Akodon azarae did not...
Tipo: Journal article
Palavras-chave: Metabolic rates; Thermoregulation; Energetic; Akodon azarae.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000100012

Microhabitat use by Cnemidophorus vacariensis (Squamata: Teiidae) in the grasslands of the Araucaria Plateau, Rio Grande do Sul, Brazil
Provedor de dados: 103
Autores: Caruccio,Rodrigo; Vieira,Renata C.; Verrastro,Laura.
Microhabitat use by Cnemidophorus vacariensis Feltrim &amp;amp; Lema, 2000 as studied between October 2006 and September 2007 in two rocky formations in the municipality of Bom Jesus. The area was searched randomly between 8:00 am and 6:00 pm and the microhabitat used by the lizards was recorded. Our observations revealed that C. vacariensis has terrestrial habits and prefers open areas. Burrows are the main microhabitat used by the species (56.38%). When in activity, 54.76% of the individuals were observed under rocks, and 38.1% on the ground where herbaceous vegetation was present. The rocks under which they constructed their burrows were on average significantly thicker during warmer seasons temperatures (x¯ = 13,45cm) with respect to colder seasons (x¯...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burrows; Rocks; Thermoregulation; Shelter.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600011

Microhabitat use by species of the genera Bothrops and Crotalus (Viperidae) in semi-extensive captivity
Provedor de dados: 80
Autores: Gomes,CA; Almeida-Santos,SM.
Many factors influence microhabitat including climate and the occurrence of predators, prey and suitable shelters. The influence of predators in a semi-extensive breeding system is minimized due to frequent monitoring of the area. This situation enables the independent analysis of such other variables as refuges and temperature. Some specimens of the Viperidae family are kept in a semi-extensive breeding system at the Butantan Institute for display and study. These animals are widely distributed in the Atlantic Forest and Cerrado, two biomes with distinct climatic characteristics. We compared the daily activity pattern and microhabitat use of the species Bothrops jararaca and Crotalus durissus terrificus. Our main questions were whether rattlesnakes and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microhabitat selection; Snakes; Thermoregulation; Viperidae.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000400007

Níveis críticos do índice de conforto térmico para ovinos da raça Santa Inês criados a pasto no agreste do Estado de Pernambuco - DOI: 10.4025/actascianimsci.v31i2.3766
Provedor de dados: 2
Autores: Neves, Maria Luciana Menezes Wanderley; Universidade Federal Rural de Pernambuco; Azevedo, Marcílio de; Universidade Federal Rural de Pernambuco; Costa, Lígia Alexandrina Barros da; Universidade Federal Rural de Pernambuco; Guim, Adriana; Universidade Federal Rural de Pernambuco; Leite, Amanda Menino; Universidade Federal Rural de Pernambuco; Chagas, Juana Cariri; Universidade Federal Rural de Pernambuco.
O objetivo deste trabalho foi estimar os valores críticos do Índice de Conforto Térmico (ICT) para ovinos deslanados da raça Santa Inês em condições de pastejo, com base nos parâmetros fisiológicos. O experimento foi conduzido de janeiro a abril na região agreste do Estado de Pernambuco. Os parâmetros temperatura retal (TR) e frequência respiratória (FR) foram avaliados três vezes por semana nos períodos da manhã e da tarde. O ambiente foi monitorado diariamente, por intermédio de uma estação meteorológica instalada ao lado do piquete experimental. As medidas para as análises de regressão foram obtidas de 15 ovinos da raça Santa Inês, sendo cinco de cada cor: branca, castanha e preta. Baseando-se na TR, os valores críticos do ICT estimados para os ovinos...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.05.00-4 cor do pelame; Fisiologia; Termorregulação Produção Animal coat color; Physiology; Thermoregulation.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3766

Performance evaluation and adaptability of lactating dairy cows fed soybean and its by-products
Provedor de dados: 2
Autores: Vasconcelos, Angela Maria de; Dias, Marcia; Nascimento, Vinicio Araújo; Façanha, Débora Andréa Evangelista.
Aiming to evaluate the lactation performance and adaptability of confined dairy cows fed diets containing soybean and its by-products, this study used 12 Holsteincows with initial production of 30 kg milk-1 day-1 day-1 in feedlot system distributed in a 4 x 4 Latin square design. The experimental period lasted 84 days. The dry matter intake (DMI) and meteorological variables were recorded daily. Milk production was measured from the 15th to the 21st day, with milk analysis twice in each period, and physiological variables collected on the 15, 17th and 21st days of each experimental period. The thermal comfort indices and rectal temperature were considered normal, however the respiratory frequency and heart rate were different between the periods. Total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Production and composition of milk; Rectal temperature; Heat stress; Thermoregulation.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22810

Physiological parameters for thermal stress in dairy cattle
Provedor de dados: 96
Autores: Dalcin,Vanessa Calderaro; Fischer,Vivian; Daltro,Darlene dos Santos; Alfonzo,Evelyn Priscila München; Stumpf,Marcelo Tempel; Kolling,Giovani Jacob; Silva,Marcos Vinícius Gualberto Barbosa da; McManus,Concepta.
ABSTRACT The objective of this study was to investigate changes in physiological parameters of dairy cows and understand which physiological parameters show greater reliability for verification of heat stress. Blood samples were collected for analysis and included hematocrit (Ht), erythrocyte count (ERY), and hemoglobin count (HEMO). In addition, physiological variables, including rectal temperature (RT), heart rate (HR), respiratory rate (RR), and panting score (PS) were recorded in 38 lactating cows. These varied according to genetic group (1/2, 3/4, and pure bred Holstein (HO)). Analysis of variance considering the effects of genetic group, days, and their interaction as well as linear and quadratic effect of the black globe humidity index (BGHI) was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broken line; Critical values; Thermal comfort; Thermoregulation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000800458

Physiological responses and animal behavior in Bonsmara-Hereford crosses vs. Hereford purebred on environment stress
Provedor de dados: 63
Autores: Taborda,Paula Alicia Batista; Saravia,Celmira Tomasina; Espasandin,Ana Carolina.
ABSTRACT: Adaptative traits (rectal temperature-RT, respiratory rate-RR) and grazing behavior (Grazing, Ruminating and Rest time, and Sun or Shade time) of Bonsmara-Hereford crossbred-BH, n = 15, and purebred Hereford-HH, n = 18, yearling heifers, in a grazing system of Uruguay. Environment characterization was made using THIadjusted by radiation and wind speed (no, mild, and severe heat weaves), and the comprehensive climatic index-CCI (no, middle, moderate and severe stress). Adaptative traits were measured twice a day, weekly, in two consecutive days in summer and winter at 08h00 and 16h00. Grazing behavior was observed from 07h00 to 21h00 each 600 s twice in summer. The records were analyzed using a mixed model. Significant effect of genotype was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Grazing behavior; Thermoregulation; Bioclimatology.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600479

Physiological responses of caprines raised under different types of covering
Provedor de dados: 70
Autores: Kawabata,Celso Y.; Jesus,Lindalva de A. de; Silva,Ana Paula V. da; Sousa,Thiago V. R. de; Cruz,Luis F. B. da.
Thermal discomfort inside facilities is one of the factors responsible for low productivity of caprines in the Brazilian Northeast region, because inadequate weather conditions can cause elevated rectal temperature, increased respiratory rate, decreased food ingestion and reduced production. The present paper aimed to study the behavior of physiological thermoregulation of the animals (respiratory rate - RR and rectal temperature - RT) at four different times of the day (8 a.m., 11 a.m., 2 p.m. and 5 p.m.) and their relation to bioclimatic indexes (Temperature Humidity Index - THI, Black Globe Humidity Index - BGHI and Radiant Heat Load - RHL) in order to determine whether the type of covering used in the animals facilities (ceramic covering - CC, asbestos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Respiratory rate; Rectal temperature; Thermoregulation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500003

Promotion of thermoregulatory insulation in nests of neotropical wasps by building extra-combs with empty cells
Provedor de dados: 82
Autores: Hozumi,Satoshi; Kudô,Kazuyuki; Zucchi,Ronaldo.
We examined the hypotheses that the empty combs of Polybia occidentalis Olivier (Hymenoptera: Vespidae) nest insulate the inside of the nest. To examine this hypotheses, two kinds of temperature measurements were carried out: 1) with the outer comb of the nest intact (Control) and 2) removed (Treatment), using a large and a small nest. In the large nest, the daily nest temperatures (outer part, Tn1; inner part, Tn2) in Control were lower by 0.6°C (Tn1) and 1.2°C (Tn2) than those in Treatment, because of a higher ambient temperature (Ta) throughout temperature assessment in Treatment. However, the excess temperature (Tn - Ta) in Control was higher than that in Treatment. The value was higher by 0.7°C at Tn1 and 0.1°C at Tn2. In the small nest, the excess...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polistinae; Polybia occidentalis; Nest architecture; Thermoregulation; Winter in neotropics.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000200008

Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
Provedor de dados: 97
Autores: VIDAL,MARCELA; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA.
Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sexual dimorphism? (2) do individuals of different age and sex segregate spatially? (3) do individuals of different age and sex use different type of microhabitat? and (4) do individuals of different sexes exhibit differences in thermoregulatory characteristics? The study was conducted in different localities from northern Chile, which include two types of rocky systems used by this species, a high and a low type. At the moment of lizard capture, type of...
Tipo: Journal article
Palavras-chave: Tropiduridae; Microlophus atacamensis; Sexual dimorphism; Thermoregulation; Spatial segregation; Chile.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002

Thermal biology of Amphisbaena munoai (Squamata: Amphisbaenidae)
Provedor de dados: 103
Autores: Matias,Nathalia Rocha; Verrastro,Laura.
ABSTRACT Studies on the thermal biology of fossorial reptiles that examine the relationship between the body temperature and thermal environment are needed to determine the extent of their thermoregulation abilities. This study assessed the thermal biology of Amphisbaena munoai Klappenbach, 1969 in the rocky fields of the Rio Grande do Sul and in the laboratory. The body temperature of most individuals was between 24 and 30 °C, both in the field (n = 81) and laboratory (n = 19). More individuals were caught in winter (n = 55) and spring (n = 60) than in summer (n = 25) and fall (n = 45), and in spring, individuals showed similar nocturnal and diurnal activities. In the laboratory, we found individuals with body temperatures up to 5 °C higher than the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphisbaenians; Microhabitat; Seasonal; Thermoregulation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100313

Thermoregulation in colonies of africanized and hybrids with Caucasian, Italian and Carniolan Apis mellifera honey bees
Provedor de dados: 52
Autores: Toledo,Vagner de Alencar Arnaut de; Nogueira-Couto,Regina Helena.
This experiment was carried out to study the internal temperature regulation of a colony of Africanized honey bees (AFR), compared with hybrid Caucasian (CAU), Italian (ITA), and Carniolan (CAR) bees, during the period of one year and different size hives located in a sub-tropical region. The instant internal temperature, 33.7 ± 1.5° C for the AFR, 33.5 ± 1.4° C for the CAU, 33.7 ± 1.5° C for the ITA and 33.8 ± 1.4° C for the CAR, did not show any significant difference (P&amp;gt;0.05). The maximum temperature (36.1 ± 2.3° C) was statistically different (P&lt;0.05) from the minimum (27.6 ± 5.3° C). There was no difference (P&amp;gt;0.05) in the mean internal temperature, between the nucleus (31.7 ± 6.3° C) and the brood nest (32.1 ± 5.3° C) measured...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperature; Honey bee; Apis; Thermoregulation; Hive; Hybrids.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400007

Thermoregulation in hypertensive men exercising in the heat with water ingestion
Provedor de dados: 56
Autores: Ribeiro,G.A.; Rodrigues,L.O.C.; Moreira,M.C.V.; Silami-Garcia,E.; Pascoa,M.R.S.; Camargos,F.F.O.
Hydration is recommended in order to decrease the overload on the cardiovascular system when healthy individuals exercise, mainly in the heat. To date, no criteria have been established for hydration for hypertensive (HY) individuals during exercise in a hot environment. Eight male HY volunteers without another medical problem and 8 normal (NO) subjects (46 ± 3 and 48 ± 1 years; 78.8 ± 2.5 and 79.5 ± 2.8 kg; 171 ± 2 and 167 ± 1 cm; body mass index = 26.8 ± 0.7 and 28.5 ± 0.6 kg/m²; resting systolic (SBP) = 142.5 and 112.5 mmHg and diastolic blood pressure (DBP) = 97.5 and 78.1 mmHg, respectively) exercised for 60 min on a cycle ergometer (40% of VO2peak) with (500 ml 2 h before and 115 ml every 15 min throughout exercise) or without water ingestion, in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypertension; Exercise; Water ingestion; Heat; Thermoregulation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300019

Thermoregulatory responses of female buffaloes reared under direct sunlight and shaded areas in the dry season on Marajó Island, Brazil
Provedor de dados: 2
Autores: Joset, Waleria Cristina Lopes; Silva, Jamile Andréa Rodrigues da; Godinho, Letícia Athaíde; Barbosa, Antônio Vinicius Corrêa; Martorano, Lucieta Guerreiro; Lourenço Júnior, José de Brito.
 This research aimed to assess the effects of dry season climate variables on Marajó Island, Brazil, on the thermoregulatory responses of twenty female buffaloes, assigned to shaded (SD), and unshaded groups (US). Data on air temperature (AT), relative air humidity, wind velocity (WV), respiratory rate (RR), rectal temperature (RT), and body surface temperature (BST) were recorded at 6 a.m., 10 a.m., 2 p.m., 6 p.m., and 10 p.m. The temperature and humidity index (THI), practical buffalo comfort climatic conditions index (BCCCIp), and practical buffalo environmental comfort index (BECIp) were calculated. At 10 a.m. and 2 p.m., WV was the highest. The RR of animals in both treatments differed only at 10 a.m. and 2 p.m. A difference in RT between treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.05.00-4 e 5.04.05.01-2 heat stress; Thermoregulation; Bubalus bubalis.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/37641

Use of cacti as heat sources by thermoregulating Mabuya agilis (Raddi) and Mabuya macrorhyncha Hoge (Lacertflia, Scincidae) in two restinga habitats in southeastern Brazil
Provedor de dados: 104
Autores: Vrcibradic,Davor; Rocha,Carlos Frederico Duarte.
Lizards may benefit from gain of heat from contact with the substrate via conduction. In this study, evidence that the lizards Mabuya agilis (Raddi, 1823) and Mabuya macrorhynclui Hoge, 1946 (Scincidae) inhabiting two restinga habitats in southeastern Brazil (Grussaf, Rio de Janeiro and Praia das Neves, Espfrito Santo), may shift microhabitat preferences along the day, and that such shifts may be related to the use of cacti surfaces as direct sources of heat is presented. For both species, body temperature (Tb) was always significantly correlated (p &lt; 0,05) with air temperature (Ta). Tb was significantly correlated (p &lt; 0,0.5) with substrate temperature (Ts) for M. agilis collected on cacti, but not for specimens collected on the ground. For M....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mabuya; Lizard; Thermoregulation; Cacti; Heat gain by conduction; Restinga habitat; Southeast Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100005