Physiological and biochemical responses in German Fawn kids subjected to cooling treatments under Mediterranean climate conditions
This study was conducted to determine the effects of different physical modifications (sprinkler and fan) related to heat stress during summer on relevant blood biochemical measures and physiological responses, such as rectal temperature (RT), respiration rate (RR), heart rate (HR), testis temperature (TT), and head temperature (HT), in kids. In total, 32 male German Fawn × Hair kids at 6 months of age were divided into 4 groups of 8. Treatments were as follows: group A: (no sprinkler, no fan) (control); group B: sprinkler only (at 1000-1100 and 1400-1500), no fan; group C: fan (1.5 m/h between 1000-1800), no sprinkler; group D: sprinkler (at 1000-1100 and 1400-1500) and fan (1.5 m/h between 1000-1800). Sprinkler + fan treatment decreased RR, RT, TT, and HT (P < 0.05), whereas sprinkler + fan, sprinkler only, and fan only increased HR. Sprinkler + fan treatment significantly decreased T3 and T4 secretion (P < 0.05). Time × fan × sprinkler interaction significantly affected HCT (P < 0.05), whereas F × S interaction affected CHO (P < 0.05). According to blood chemistry and physiological responses, fan treatment was more effective than sprinkler and may be recommended as a means to alleviate heat stress in goats under Mediterranean climate conditions; however, further research is needed to optimize sprinkler cooling.
Physiological and biochemical responses in German Fawn kids subjected to cooling treatments under Mediterranean climate conditions
This study was conducted to determine the effects of different physical modifications (sprinkler and fan) related to heat stress during summer on relevant blood biochemical measures and physiological responses, such as rectal temperature (RT), respiration rate (RR), heart rate (HR), testis temperature (TT), and head temperature (HT), in kids. In total, 32 male German Fawn × Hair kids at 6 months of age were divided into 4 groups of 8. Treatments were as follows: group A: (no sprinkler, no fan) (control); group B: sprinkler only (at 1000-1100 and 1400-1500), no fan; group C: fan (1.5 m/h between 1000-1800), no sprinkler; group D: sprinkler (at 1000-1100 and 1400-1500) and fan (1.5 m/h between 1000-1800). Sprinkler + fan treatment decreased RR, RT, TT, and HT (P < 0.05), whereas sprinkler + fan, sprinkler only, and fan only increased HR. Sprinkler + fan treatment significantly decreased T3 and T4 secretion (P < 0.05). Time × fan × sprinkler interaction significantly affected HCT (P < 0.05), whereas F × S interaction affected CHO (P < 0.05). According to blood chemistry and physiological responses, fan treatment was more effective than sprinkler and may be recommended as a means to alleviate heat stress in goats under Mediterranean climate conditions; however, further research is needed to optimize sprinkler cooling.
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- Duncan, D.B.: Multiple range and multiple F test. Biometrics, 1955; 11: 1-42.
- SPSS: Statistical package for the social sciences (Version 11.5). Chicago: SPSS Inc, 2002.
- Hızlı, H.: The application of repeated measures designs for agricultural data. PhD Dissertation. Çukurova University, Institute of Natural and Applied Sciences, Adana, Turkey. 2001 (MSc thesis in Turkish, with an abstract in English).
- 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 Ruminant Res., 2003; 49: 193-198.
- Spiers, D.E., Spain, J.N., Sampson, J.D., Rhoads, R.P.: Use of physiological parameters to predict milk yield and feed intake in heat-stressed dairy cows. J. Therm. Biol., 2004; 29: 759-764.
- Darcan, N., Güney, O.: Effect of spraying on growth and feed efficiency of kids under subtropical climate. Small Ruminant Res., 2002; 43: 189-190.
- Darcan, N., Güney, O.: Alleviation of climatic stress of dairy goats in Mediterranean climate. Small Ruminant Res., 2008; 74: 212-215.
- Knižková, I., Kunc, P., Koubková, M., Flusser, J., Dolezal, O.: Evaluation of naturally ventilated dairy barn management by a thermographic method. Livest. Prod. Sci., 2002; 77: 349-353.
- Darcan, N.: A study on adaptation mechanism of crossbred goat types in Çukurova subtropical climate conditions. MSc Dissertation, Çukurova University, Adana, Turkey. 2000 (MSc thesis in Turkish, with an abstract in English).
- Joshi, B.C., Arvindam, M., Singh,K., Bhattacharya, N.K.: Effect of high environmental temperature stress in the physiological responses of bucks. Indian J. Anim. Sci., 1997; 47: 200-203.
- Alnaimy, A., Habeeb, M., Fayaz, I., Marai, M., Kamal, T.H.: Heat stress. In: Farm animals and the environment. CAB, Int. University Press, Cambridge. 1992.
- Habeeb, A.M., Marai, I.F.M., Kamal, T.H., Owen, J.B.: Genetic improvement of livestock for heat adaptation in hot climates. In: Proceedings of International Conference on Animal, Poultry and Rabbit Production and Health. Dokki, Cairo. 1997; 11-16.
- Kamal, T.H., Habeeb, A.M., Abdel-Samee, A., Marai, I.F.M.: Milk production of heat stressed Friesian cows and its improvement in the tropics. Proc. of Int. Sypm. on the Constrains and Possibilities of Ruminant Production in the Dry Subtropics, Cairo, Egypt. 1989; 156-158.