068 Hair Shedding Score and Hair Coat Color Affect Body Temperature during Heat Stress in Weaned Beef Heifers

2016 ◽  
Vol 95 (suppl_1) ◽  
pp. 34-34
Author(s):  
J. A. Parish ◽  
J. A. Carroll ◽  
P. R. Broadway ◽  
T. F. Best ◽  
C. O. Stewart ◽  
...  
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Coat Color ◽  
Beef Heifers ◽  
Hair Coat

White hair coat color does not influence heat tolerance of sheep grazing under a hot arid environment

2021 ◽  
pp. 106410
Author(s):  
Ahmed Abrahim Al-Haidary ◽  
Yusuf Al-Dosari ◽  
Abd-Elatif Abd-Elwahab ◽  
Emad Mohamed Samara ◽  
Mohammed Abdo Al-Badwi ◽  
...  
Keyword(s):  
Heat Tolerance ◽  
Coat Color ◽  
Arid Environment ◽  
White Hair ◽  
Sheep Grazing ◽  
Hair Coat

scholarly journals Heat Stress and Cardiovascular, Hormonal, and Heat Shock Proteins in Humans

2012 ◽  
Vol 47 (2) ◽  
pp. 184-190 ◽  
Author(s):  
Masaki Iguchi ◽  
Andrew E. Littmann ◽  
Shuo-Hsiu Chang ◽  
Lydia A. Wester ◽  
Jane S. Knipper ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heat Stress ◽  
Heat Shock ◽  
Body Temperature ◽  
Controlled Trial ◽  
Whole Body ◽  
Cord Injury ◽  
Whole Body Heat Stress ◽  
Body Heat

Context: Conditions such as osteoarthritis, obesity, and spinal cord injury limit the ability of patients to exercise, preventing them from experiencing many well-documented physiologic stressors. Recent evidence indicates that some of these stressors might derive from exercise-induced body temperature increases. Objective: To determine whether whole-body heat stress without exercise triggers cardiovascular, hormonal, and extra-cellular protein responses of exercise. Design: Randomized controlled trial. Setting: University research laboratory. Patients or Other Participants: Twenty-five young, healthy adults (13 men, 12 women; age = 22.1 ± 2.4 years, height = 175.2 ± 11.6 cm, mass = 69.4 ± 14.8 kg, body mass index = 22.6 ± 4.0) volunteered. Intervention(s): Participants sat in a heat stress chamber with heat (73°C) and without heat (26°C) stress for 30 minutes on separate days. We obtained blood samples from a subset of 13 participants (7 men, 6 women) before and after exposure to heat stress. Main Outcome Measure(s): Extracellular heat shock protein (HSP72) and catecholamine plasma concentration, heart rate, blood pressure, and heat perception. Results: After 30 minutes of heat stress, body temperature measured via rectal sensor increased by 0.8°C. Heart rate increased linearly to 131.4 ± 22.4 beats per minute (F6,24 = 186, P < .001) and systolic and diastolic blood pressure decreased by 16 mm Hg (F6,24 = 10.1, P < .001) and 5 mm Hg (F6,24 = 5.4, P < .001), respectively. Norepinephrine (F1,12 = 12.1, P = .004) and prolactin (F1,12 = 30.2, P < .001) increased in the plasma (58% and 285%, respectively) (P < .05). The HSP72 (F1,12 = 44.7, P < .001) level increased with heat stress by 48.7% ± 53.9%. No cardiovascular or blood variables showed changes during the control trials (quiet sitting in the heat chamber with no heat stress), resulting in differences between heat and control trials. Conclusions: We found that whole-body heat stress triggers some of the physiologic responses observed with exercise. Future studies are necessary to investigate whether carefully prescribed heat stress constitutes a method to augment or supplement exercise.

The comparative performance of tropical crossbred and local shorthorn beef cattle on native pasture at Katherine, NT

1967 ◽  
Vol 7 (26) ◽  
pp. 217 ◽  
Author(s):  
MJT Norman
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Peanut Meal ◽  
Average Weight ◽  
Wet Season ◽  
Comparative Performance ◽  
Native Pasture ◽  
Weight Gains ◽  
Adaptation To Heat ◽  
Dressing Percentage

The liveweight performance and carcase characteristics of Brahman x Hereford, Africander x Hereford and Africander x Shorthorn F, crossbred spayed heifers were compared with those of local Shorthorn spayed heifers on native pasture at Katherine, N.T., between 1962 and 1965. The breed groups were divided for planes of winter nutrition, viz., with and without 2 lb a day of peanut meal from early June until the start of the wet season. Without supplement, the average weight gains of B x H, A x H, A x S, and Shorthorn cattle between June 1962 and May 1965 were 0.49, 0.37, 0.36, and 0.23 lb a day respectively. With supplement, cattle reached slaughter weight a year earlier ; the average weight gains of B x H, A x H, and Shorthorn cattle between June 1962 and May 1964 were 0.61, 0.63, and 0.50 lb a day respectively. (There was no A x S supplemented group). Without supplement, the dressing percentage and estimated proportion of fat of B x H cattle was higher and the estimated proportion of muscle and bone lower than those of other breeds. With supplement, there were no significant differences in dressing percentage or carcase composition between breeds. Measurements made of thermoregulatory attributes indicated that the local Shorthorn cattle, through body temperature control, showed adaptation to heat stress.

scholarly journals Evaluating the impact of breed, pregnancy, and hair coat on body temperature and sweating rate of hair sheep ewes in the tropics1

2017 ◽  
Vol 95 (7) ◽  
pp. 2936-2942 ◽  
Author(s):  
R. W. Godfrey ◽  
W. D. Preston ◽  
S. R. Joseph ◽  
L. LaPlace ◽  
P. E. Hillman ◽  
...  
Keyword(s):  
Body Temperature ◽  
Sweating Rate ◽  
Hair Sheep ◽  
Hair Coat ◽  
The Impact

Differences in body temperature, cell viability, and HSP-70 concentrations between Pelibuey and Suffolk sheep under heat stress

2013 ◽  
Vol 45 (8) ◽  
pp. 1691-1696 ◽  
Author(s):  
Rosita Denny Romero ◽  
Arnulfo Montero Pardo ◽  
Hugo Horacio Montaldo ◽  
Ana Delia Rodríguez ◽  
Joel Hernández Cerón
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Cell Viability ◽  
Hsp 70 ◽  
Suffolk Sheep

scholarly journals Infrared thermography to assess thermoregulatory reactions of buffaloes supplemented with antioxidant and dense energy source in summer season

2021 ◽  
Vol 23 (3) ◽  
pp. 243-248
Author(s):  
YALLAPPA M. SOMAGOND ◽  
S. V. SINGH ◽  
ADITYA DESHPANDE ◽  
PARVENDER SHEORAN ◽  
V. P. CHAHAL
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Infrared Thermography ◽  
Rectal Temperature ◽  
Control Group ◽  
Group I ◽  
Close Relationship ◽  
Region Temperature ◽  
Cortisol Levels ◽  
Lower Magnitude

Twenty-four lactating buffaloes were chosen and subsequently divided into 4 groups i.e. group-I (control), group-II (supplemented astaxanthin at 0.25 mg kg-1 BW/day), group-III (prill fat at 100 g day-1), and group-IV (combination). Surface body temperature at different anatomical regions of buffaloes was recorded using infrared thermography (IRT), rectal temperature using a digital thermometer, and cortisol hormone by ELISA kit at the fortnightly interval. Forehead region temperature showed a higher correlation (0.390) with THI compared to other anatomical regions. The change in surface body temperature was positively correlated with THI and cortisol levels. The increase in the IRT temperature at different anatomical sites of buffaloes was at a lower magnitude in treatment groups compared to the control group. Udder surface temperature was higher in peak lactation and high producing buffaloes. Forehead region temperature showed a close relationship with rectal temperature and cortisol levels of buffaloes. According to the research findings, astaxanthin and prill fat can be used in ameliorating heat stress. Infrared thermography (non-invasive method) of the forehead and udder can be used as indicators for measuring the heat stress and production levels of buffaloes, respectively.

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