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2014 | 58 | 2 |

Tytuł artykułu

Effect of thermal stress on physiological and blood parameters in merino sheep

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Fifteen sheep where placed in climatic chamber and exposed to a high temperature (30°C). Then, the air movement was induced in order to examine its soothing effect on heat stress. The physiological reactions like respiratory and heart rates, as well as the morphologic, biochemical parameters and cortisol levels in blood were examined. It was found that under heat stress conditions, the respiratory rate increased up to 96.43 breaths/min, heart rate up to 107.79 beats/min, and white blood cells count decreased to 9.12 k/µL. The increased level of potassium, chlorine, and calcium was also observed. The increased air movement resulted in thermal stress soothing. A decrease in respiratory rate, heart rate, and cortisol concentration was observed. The study demonstrated that heat stress leads to serious changes in physiological and blood parameters in sheep but this effect can be minimised by air movement.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

58

Numer

2

Opis fizyczny

p.283-288,ref.

Twórcy

autor
  • Department of Environmental Hygiene and Animal Welfare, Faculty of Biology and Animal Sciences, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland
autor
  • Department of Environmental Hygiene and Animal Welfare, Faculty of Biology and Animal Sciences, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland
autor
  • Department of Environmental Hygiene and Animal Welfare, Faculty of Biology and Animal Sciences, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland

Bibliografia

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  • 2. Christison G.I., Johnson H.D.: Cortisol turnover in heat stressed cows. J Anim Sci 1972, 53, 1005-1010.
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  • 4. Gomes da Silva R., Paranhos da Costa M.J.R., Silva Sobrinho A.G.: Influence of hot environments on some blood variables of sheep. Int J Biometeorol 1992, 36, 223-225.
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  • 9. Marai I.F.M., El-Darawany A.A., Fadiel A., Abdel Hafez M.A.M.: Physiological traits as affected by heat stress in sheep- A review. Small Rum Res 2006, 71, 1-12.
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  • 11. Pereira A.M.F., Baccari F.Jr., Titto E.A.L., Almeida J.A.A.: Effect of thermal stress on physiological parameters, feed intake and plasma thyroid hormones concentration in Alentejana, Mertolenga, Frisian and Limousine cattle breeds. Int J Biometeorol 2008, 52, 199-208.
  • 12. Sakurada S., Hales J.R.S.: A role for gastrointestinal endotoxins in enhancement of heat tolerance by physical fitness. J Appl Physiol 1998, 84, 207-214.
  • 13. Schmidt Nielsen K.: Animal Physiology. Adaptation and environment. Press Syndicate of the University of Cambridge, U.K., 1997.
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  • 15. Singh M., Rai A.K., More T., Dhaliwal J.S.: Note on comparative physiological response of sheep and goats to high ambient temperature. Indian J Anim Sci 1980, 50, 202-205.
  • 16. Srikandakumar A., Johnson E.H., Mahgoub O.: Effect of heat stress on respiratory rate, rectal temperature and blood chemistry in Omani and Australian Merino sheep. Small Rum Res 2003, 49, 193-198.
  • 17. Taylor R.E.: Adaptation to the environment. In: Scientific Farm Animal Production, Macmillan Publishing Company, New York, NY, 1992, pp. 326-332.
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  • 19. Winnicka A.: Reference values of basic laboratory tests in veterinary medicine. SGGW, Warszawa, 2011.

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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