Refuge sites, activity and torpor in wild common dunnarts (Sminthopsis murina) in a temperate heathland

2013 ◽  
Vol 35 (2) ◽  
pp. 153 ◽  
Author(s):  
David C. Paull
Keyword(s):  
Skin Temperature ◽  
Physiological Responses ◽  
Daily Temperature ◽  
Winter Period ◽  
Movement Activity ◽  
Free Living ◽  
Site Use ◽  
Warm Temperate ◽  
Ambient Surface ◽  
Torpor Bouts

This telemetric study describes patterns of movement, activity, refuge-site use and torpor in free-living Sminthopsis murina over one autumn/winter period in a warm-temperate habitat. S. murina were found to rest during the day in burrows and hollow logs. Individuals maintained several daytime refuges and foraged over several hectares each night. They were found to prefer agamid burrows where a daily temperature of 10.3–15.8°C was maintained when ambient surface temperatures varied between 3.5 and 24.6°C. Torpor was employed in 12 of 13 complete resting periods recorded. Dunnarts were found to use both long (>6 h) and short (<4 h) torpor bouts with a minimum skin temperature of 17.2–26.7°C. Typically, torpor occurred in the morning, though bouts into the afternoon were also recorded. Arousal rates from torpor were variable and were achieved by endogenous and passive means. Normothermic rest bouts tended to be short (mostly <3 h) though longer periods were recorded, with a mean resting skin temperature of 32.3 ± 0.8°C. The variable physiological responses observed in S. murina seem to follow a facultative pattern, and, along with long activity periods and their use of refuge sites, may be linked to variable invertebrate activity during cooler months.

Comparative Efficacy of Physiological Responses and Skin Temperatures in Indigenous and Crossbred Cattle Supplemented with Chlorophytum borivilianum in Summer Season

2021 ◽  
Author(s):  
Pooja Devi ◽  
Mahendra Singh ◽  
Yallappa M. Somagond ◽  
A.K. Roy
Keyword(s):  
Heat Stress ◽  
Skin Temperature ◽  
Physiological Responses ◽  
High Dose ◽  
Crossbred Cattle ◽  
Comparative Efficacy ◽  
Production Potential ◽  
Chlorophytum Borivilianum ◽  
Humidity Index ◽  
Skin Temperatures

Background: Heat stress causes oxidative stress and declines milk production potential of cows. The physiological responses and skin temperature of heat stressed animals are good indices for deterring the heat stress. The efficacy of medicinal herb Chlorophytum borivilianum (CB) was tested in lowering the rise in values of physiological responses and skin temperature in crossbred vis a vis Indigenous cows. Methods: Eighteen Tharparkar (TP) and Crossbred KF cows in mid-lactation were given; No supplement (control), a low (T1, n=6) and a high dose (T2, n=6) of CB @ 40 and 80 mg/kg BW/day, respectively for 90 days during hot-humid season. Respiration rate (RR), pulse rate (PR), rectal temperature (RT) and skin temperature (ST) was recorded at the site of forehead, neck, rear body, and udder surface in the morning and afternoon at weekly intervals. Temperature-humidity index (THI) was calculated to assess the degree of thermal stress in animals. Result: Physiological responses and skin temperatures were higher (p less than 0.01) in the afternoon than morning intervals in TP and KF cows. CB feeding significantly lowered physiological responses and ST (p less than 0.01) in high dose as compared to low dose. It was concluded that CB feeding @ 80 mg/kg BW/day effectively alleviates the heat stress. Indigenous cows were found more heat tolerant in comparison to crossbred cows.

scholarly journals Analysis of climate of Rivnenskyi Nature Reserve from 2000 to 2015

2018 ◽  
pp. 53-60
Author(s):  
Oleksandr Horbach
Keyword(s):  
Nature Reserve ◽  
Winter Season ◽  
Summer Season ◽  
Daily Temperature ◽  
Winter Period ◽  
Autumn Period ◽  
Average Daily Temperature ◽  
Spring Period ◽  
Unstable Temperature

The analysis of monthly climatic terms of Rivnenskyi Nature Reserve was conducted. It is marked that weather terms have substantial differences due to an unstable temperature condition since creation of reserve. A spring period was the shortest in 2013 – 64 days and had the greatest average daily temperature 11.9 °С. Protracted a spring period was in 2002 – 123 days. The most of precipitations in a spring period was fixed in 2008 – 196.2 mm, and the least in 2011 – 42.1 mm. A summer period in 2015 became the most protracted – 131 day. Moreover, the least protracted summer was in 2006 – 90 days. The warmest summer season was in 2010 with an average daily temperature 19.8 °С. The most raining summer was in 2007 when a 471.3 mm of precipitations is fixed, and the least raining summer was in 2002 (144.6 mm of precipitations). The most protracted autumn period was in 2006 – 107 days and the shortest one was in 2001 – 57 days. The warmest autumn was in 2004 when an average daily temperature reached 9.2°С. The most of precipitations in the autumn period is fixed in 2009 – 178 mm, and the least in 2001 – 39 mm. The winter periods were protracted in 2004/05 and 2005/06. Their duration was 114 days. Winter period in 2009/10 with an average daily temperature -7.9°С was the coldest one. The most precipitations are fixed in winter 2005/06 – 208.4 mm, and the least in a winter period 2012/13 are a 52.2 mm. The most of precipitations for a year fell out 777.8 mm in 2012, and the least one in 2011 – 427 mm. The average long-term dates of the beginning of the year seasons are defined. The average long-term date of the beginning of the spring season is on February 27; the summer season is on May 26; the autumn season is on September 14; the winter season is on December 5. Key words: Rivnenskyi Nature Reserve, seasons of the year, precipitation, climatic terms, temperature, long-term date.

scholarly journals The role of carbon dioxide in nematode behaviour and physiology

Parasitology ◽  
2019 ◽  
Vol 147 (8) ◽  
pp. 841-854 ◽  
Author(s):  
Navonil Banerjee ◽  
Elissa A. Hallem
Keyword(s):  
Carbon Dioxide ◽  
Neural Circuit ◽  
Physiological Responses ◽  
Life Stage ◽  
Free Living ◽  
Behavioural Responses ◽  
Wide Range ◽  
Sensory Cue ◽  
Context Dependent

AbstractCarbon dioxide (CO2) is an important sensory cue for many animals, including both parasitic and free-living nematodes. Many nematodes show context-dependent, experience-dependent and/or life-stage-dependent behavioural responses to CO2, suggesting that CO2 plays crucial roles throughout the nematode life cycle in multiple ethological contexts. Nematodes also show a wide range of physiological responses to CO2. Here, we review the diverse responses of parasitic and free-living nematodes to CO2. We also discuss the molecular, cellular and neural circuit mechanisms that mediate CO2 detection in nematodes, and that drive context-dependent and experience-dependent responses of nematodes to CO2.

Assessment of Autonomic Responses to Different Driving and Road Conditions

2000 ◽  
Vol 44 (37) ◽  
pp. 679-679
Author(s):  
Byung-Chan Min ◽  
Soon-Cheol Chung ◽  
Sang-Gyun Kim ◽  
Byung-Woon Min ◽  
Chul-Jung Kim ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Skin Temperature ◽  
Galvanic Skin Response ◽  
Physiological Responses ◽  
Mean Value ◽  
Autonomic Responses ◽  
Skin Response ◽  
Curved Road

The purpose of this study was to compare changes in autonomic responses due to different driving and road conditions. We measured physiological responses of the 10 health subjects such as Heart Rate Variability (HRV), Galvanic Skin Response (GSR) and skin temperature in rest and stimulation conditions. The ratio of LF/HF significantly increased and averaged R-R interval decreased on the abrupt stopping and starting and abruptly curved road conditions, compared to other conditions. Mean value of GSR increased and mean value of skin temperature decreased in the abrupt stopping and starting and abruptly curved road conditions, compared to other conditions.

Acclimatization of Scottish Blackface sheep to cold. 2. Skin temperature, heart rate, respiration rate, shivering intensity and skinfold thickness

1968 ◽  
Vol 10 (1) ◽  
pp. 17-35 ◽  
Author(s):  
A. R. Sykes ◽  
J. Slee
Keyword(s):  
Heart Rate ◽  
Skin Temperature ◽  
Cold Exposure ◽  
Chronic Exposure ◽  
Physiological Responses ◽  
Skinfold Thickness ◽  
Acute Exposure ◽  
Heart Rates ◽  
Ambient Temperatures ◽  
Acute Cold Exposure

Closely shorn Scottish Blackface female sheep aged 9–14 months, half on high plane and half on low plane nutrition, were subjected, in climate chambers, to two short acute cold exposures down to −20°C. The acute exposures were separated by two weeks chronic exposure to a moderately subcriticai temperature (+8°C) or to a thermoneutral temperature (+30°C). Most of the sheep showed a greater resistance to body cooling at the second acute exposure (Slee and Sykes, 1967). This increased resistance to hypothermia, defined as acclimatization, was apparently influenced more by acute than by chronic cold exposure. The present paper deals with changes in skin temperature, heart rate, shivering intensity and skinfold thickness which also resulted from cold exposure, and accompanied acclimatization.After acute cold exposure followed by chronic exposure to +8°C the following changes in these parameters were observed:1. Extremity skin temperatures and heart rates were consistently increased at thermoneutral ambient temperatures.2. Vasoconstriction of the extremities and increased heart rate, both of which normally occur during the early stages of cold exposure, were delayed.3. Heart rates at sub-zero ambient temperatures were increased.4. Cold-induced vasodilatation at sub-zero ambient temperatures was increased.After acute cold treatment alone the intensity of shivering during the second acute exposure was reduced. Also the onset of foot vasoconstriction was slightly delayed.A highly significant relationship was observed between shivering intensity and heart rate during cold exposure.Plane of nutrition had less effect on the physiological responses to cooling than did previous cold experience.It was suggested in discussion that the physiological responses associated with acclimatization were: elevated basal metabolic rate, delayed onset of vasoconstriction and delayed metabolic response to cold, and consequent lowering of the critical temperature. Summit metabolism was also increased and shivering intensity reduced during acute cold exposure. Some of these responses could have resulted from either acute or chronic moderate cold exposure. However their persistence, once induced, appeared to depend upon continued exposure to moderate cold.

scholarly journals Kajian Eksperimen Pengaruh Lingkungan Panas Terhadap Suhu Kulit Manusia Menggunakan Fast Response Temperature Probe PS-2135 dan Temperature Array PS-2157

Jurnal MIPA ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 67
Author(s):  
Hesky Stevy Kolibu ◽  
Verna Albert Suoth
Keyword(s):  
Skin Temperature ◽  
Physiological Responses ◽  
Fast Response ◽  
Heat Losses ◽  
The Body ◽  
Temperature Changes ◽  
Fundamental Factor ◽  
Temperature Probe ◽  
Heat Exchanges ◽  
Sweat Evaporation

Fisika  merupakan  ilmu  alam  yang  saling  berkaitan  dengan  ilmu  lainnya. Salah  satu keterkaitannya  mempelajari  sistem  adaptasi  tubuh  manusia  terhadap  perubahan  suhu. Suhu kulit adalah faktor mendasar dalam pertukaran panas antara tubuh dan lingkungannya. Tingkat suhu kulit secara langsung mempengaruhi transfer energi oleh konveksi dan radiasi dan juga memengaruhi kehilangan panas dari penguapan keringat. Dalam studi eksperimental ini, nilai perubahan suhu kulit dikumpulkan menggunakan Fast Response Temperature Probe PS-2135 dan Temperature Array PS-2157. Tujuan dari studi ini adalah untuk menyelidiki efek dari lingkungan panas pada respon fisiologis suhu kulit tubuhPhysics is a natural science that is interrelated with other sciences. One connection is studying the human body's adaptation system to temperature changes. Skin  temperature  is  a  fundamental  factor  in  heat exchanges  between  the  body  and  its  environment. The level  of  skin  temperature  directly  affects  the energy  transfer  by  convection  and  radiation  and also  influences  heat  losses  from  sweat  evaporation. In this experimental study, the skin temperature changes values are collected using Fast Response Temperature Probe PS-2135 and Temperature Array PS-2157. The purpose of this study was to investigate the effects of warm environmental on physiological responses of body skin temperaturePhysics is a natural science that is interrelated with other sciences. One connection is studying the human body's adaptation system to temperature changes. Skin  temperature  is  a  fundamental  factor  in  heat exchanges  between  the  body  and  its  environment. The level  of  skin  temperature  directly  affects  the energy  transfer  by  convection  and  radiation  and also  influences  heat  losses  from  sweat  evaporation. In this experimental study, the skin temperature changes values are collected using Fast Response Temperature Probe PS-2135 and Temperature Array PS-2157. The purpose of this study was to investigate the effects of warm environmental on physiological responses of body skin temperature

scholarly journals Skin Temperature and Exercise Performance after Passive Rest in a Cool Environment

Proceedings ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 14
Author(s):  
Kapnia ◽  
LydiaTsoutsoubi ◽  
Gkiata ◽  
Ioannou ◽  
Koutedakis ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Skin Temperature ◽  
Athletic Performance ◽  
Physiological Responses ◽  
Basketball Players ◽  
Warm Up ◽  
Impaired Performance ◽  
Cool Environment ◽  
Exercise Induced ◽  
The Impact

Aim: Warm-up activates muscular thermogenesis leading to enhanced athletic performance and reduced risk for exercise-induced injuries. However, very little is known about the thermo physiological responses of elite basketball players during the time spent on bench (BENCH) and consequently its impact on athletic performance in cool environments. Therefore, the purpose of this study was to investigate the impact of BENCH on the thermo physiological responses and athletic performance of elite basketball players. Material & Method: Six elite male basketball players (age, 24.9 ± 4.6 year; BMI, 25.5 ± 1.8 kg/m2) participated in the study. Following a 20-min warm up, the participants were randomly allocated in four different scenarios: (i) 9-min BENCH wearing basketball uniform, (ii) 9-min BENCH wearing basketball uniform and insulative clothing, (iii) 23-min BENCH wearing basketball uniform, and (iv) 23-min BENCH wearing basketball uniform and insulative clothing. The athletic performance of the participants was examined by conducting fitness test pre- and post-BENCH scenarios. Mean skin temperature (Tsk) was calculated from two sites (arm and thigh), while ambient temperature was recorded using a portable weather station. Results: Ambient temperature (16.8 ± 1.2 °C) ranged from 18.2 to 15.5 °C. We identified an increase of 1 °C in Tsk during 23-min BENCH scenarios (p < 0.05). Similarly, we found that counter-movement jump was significantly reduced after 23-min BENCH with basketball uniform (−2.8 cm) and 23-min BENCH with basketball uniform and insulative clothing (−3.4 cm, p < 0.05). On the other hand, there were no statistically significant differences in Tsk and athletic performance between the baseline and post 9-min BENCH measures (p > 0.05). Conclusions: The present study showed that 23 min of bench time reduces high-intensity players’ performance in both conditions (23 min bench time + basketball uniform, 23 min bench time + basketball uniform and insulative clothing) in cool environment. Thus, further studies are needed in order to identify factors causing impaired performance.

Hibernation in Free-Living Mountain Pygmy-Possums, Burramys Parvus (Marsupialia, Burramyidae)

1995 ◽  
Vol 43 (4) ◽  
pp. 373 ◽  
Author(s):  
LS Broome ◽  
F Geiser
Keyword(s):  
Temperature Sensitive ◽  
Free Living ◽  
Temperature Regimes ◽  
In The Wild ◽  
Males And Females ◽  
Torpor Bouts

The long-term pattern of hibernation was studied in free-living mountain pygmy-possums, Burramys parvus, using temperature-sensitive radio-collars. Most males and females began to hibernate in early June within one week of their release. Hibernation was interrupted by spontaneous arousals that were followed by short normothermic periods and re-entry into torpor. The duration of multiday torpor bouts averaged 8 . 0 days (range 3-17 days) and arousal periods averaged 19 . 1 h. Single-day torpor bouts were observed occasionally. The duration of torpor bouts lengthened with the progress of the hibernation season and normothermic periods became shorter. The pattern of hibernation in free-living B. parvus was similar to that of captive individuals maintained under temperature regimes that were similar to those in the wild.

Cooling During Exercise May Induce Benefits Linked to Improved Brain Perfusion

2020 ◽  
Author(s):  
Wafa Douzi ◽  
Benoit Dugué ◽  
Dimitri Theurot ◽  
Ludwig Vinches ◽  
Stéphane Hallé ◽  
...  
Keyword(s):  
Heart Rate ◽  
Skin Temperature ◽  
Cooling System ◽  
Heart Rate Recovery ◽  
Physiological Responses ◽  
Recovery Period ◽  
Subjective Rating ◽  
Brain Level ◽  
The Impact ◽  
The Brain

AbstractThe aim of this study was to evaluate the impact of using a cooling vest during physical exercise (per-cooling) in humid and temperate conditions (≈22°C, ≈80% relative humidity) on perceptual and physiological responses (tissue oxygenation and heart rate). 20 physically active men performed twice a 30-min cycling exercise at 70% of their theoretical maximum heart rate while using an activated (experimental condition) and a deactivated (control condition) cooling system in a randomized crossover study. Heart rate and tissue (cerebral and muscular) oxygenation were continuously measured during exercise and recovery, and skin temperature was measured every 10 min. Perception of temperature, humidity and comfort were assessed at the end of the recovery period. Results showed a decrease in trunk skin temperature (p<0.05), a faster heart rate recovery and an increase in the concentration of total hemoglobin at the brain level (p<0.05) compared with control condition. Moreover, an improved subjective rating of thermal sensations, wetness and comfort compared to control values (p<0.05) was noted. In conclusion, wearing a cooling vest during submaximal exercise improves perceptual and physiological responses in humid temperate conditions, which may be due to a better blood perfusion at the brain level and a better parasympathetic reactivation.

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