Azzam,, A., Abd EI-Ghany, W. (2004). THE ROLE OF HAIR COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN GOATS. Journal of Animal and Poultry Production, 29(8), 4473-4486. doi: 10.21608/jappmu.2004.239410
A. H. Azzam,; W. H. Abd EI-Ghany. "THE ROLE OF HAIR COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN GOATS". Journal of Animal and Poultry Production, 29, 8, 2004, 4473-4486. doi: 10.21608/jappmu.2004.239410
Azzam,, A., Abd EI-Ghany, W. (2004). 'THE ROLE OF HAIR COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN GOATS', Journal of Animal and Poultry Production, 29(8), pp. 4473-4486. doi: 10.21608/jappmu.2004.239410
Azzam,, A., Abd EI-Ghany, W. THE ROLE OF HAIR COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN GOATS. Journal of Animal and Poultry Production, 2004; 29(8): 4473-4486. doi: 10.21608/jappmu.2004.239410
THE ROLE OF HAIR COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN GOATS
Wool Production and Technology Department, Desert Research Center, Mataria, Cairo, Egypt
Abstract
This experiment was carried out at Maryout Research Station of the Desert Research Center, located 35km south west of Alexandria, to study the role of some hair coat characteristics of Baladi goats under stress of solar radiation and water salinity on some adaptive physiological parameters. The experimental period extended from the first of July to the middle of September 2000. Twenty adult Baladi bucks were randomly divided into four equal groups. Two groups were exposed to solar radiation and the two other groups were raised under shade. One of the two exposed groups was allowed to drink tap water (0.3g/L TOS) and the second group was offered saline seawater (13.1 gIL TOS). The same respective order was done in the other shaded groups. Staple length (STL), fibre diameter (FO), medullated fibres percentage (C1 ,C2 and C3) were measured. Plasma total protein (TP), albumin (AI), globulin (GI), NG ratio, sodium (Na), urea (UR) and creatinine concentrations were determined.
Results revealed that each of drinking saline water and exposure to solar radiation caused a significantly decrease in body weight for all experimental groups. The lost in body weight was higher (4.03kg) in the shaded-saline watered group, while it was lower in control group (0.90 kg). TP, AI and GI were significantly (P<0.05)decreased in response to drinking saline water and also exposure to sun rays, while NG ratio, plasma Na, CRE and UR concentrations were significantly increased. A significant (P<0.01) correlation was found between both of CRE (r= - 0.88) and Na (r= - 0.81) concentrations and fibre diameter, while the correlation between the all studied blood constituents and staple length was not significant. On the other hand, staple length and medullated fibre percentage diluted the effect of solar radiation on body weight loss
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