Seasonal Fluctuations in the Haematological Values of the Nubian Goats

No Thumbnail Available
Mohamed,Mariam Yousif Ibrahim
Journal Title
Journal ISSN
Volume Title
University of Khartoum
This study was to investigate effects of seasonal changes in thermal environment and relative humidity as well as the effect of age on certain haematological values in Nubian goats under tropical conditions of northern Sudan in Shambat (16°N) during July 1995.-June 1996. The climatic data showed that the highest values for maximum temperature were reported in dry summer followed by wet summer and winter while the highest values of relative humidity were obtained in wet summer and lower values in winter and dry summer. The highest values of erythrocytes count, PCV and Hb concentration were during wet summer and the lowest values were during dry summer. The values for RBC count during winter and dry summer did not significantly differ while the difference in the PCV values was not significant between wet summer and winter. There was a negative correlation between monthly mean values of PCV and the respective mean values of ambient temperature while the erythrocyte count and Hb concentration showed a positive correlation with mean values of temperature. The 2.5 years old group showed significantly (P < 0.00l) higher values of PCV and Hb concentration compared to other age groups. The MCV and MCH were significantly (P < 0.05) higher during winter compared to the values obtained in wet and dry summer. There were no seasonal variations in the values of MCHC. The effect of age on the MCV, MCH and MCHC were not significant. Neither season nor age had any detectable effect on ESR. The leukocyte count was not significantly affected by seasonal changes in the thermal environment. There was a negative correlation between the monthly mean values of leukocyte count and the respective mean value of ambient temperature. The total leukocytes count was almost the same in 2 and 2.5 years old animals but a significant (P < 0.00l) decrease was found in 3 years old group. The seasonal differences in the percentage of neutrophils, lymphocytes, eosinophils and basophils were not significant. However, the percentages of monocytes were significantly (P < 0.05) higher during wet and dry summer than during winter. There was a progressive significant decrease in the percentage of lymphocytes with advance of age, while the other types of leukocytes were not influenced by age. There was a progressive significant (P < 0.0l) decrease in albumin concentration from wet summer through winter to dry summer. There were no significant changes in the concentration of serum total protein and globulin. The albumin concentration in 2.5 years old goats was significantly (P < 0.0l) lower than the values in the other age groups. Conversely, globulin concentration was significantly (P < 0.05) higher in 2.5 years old group than in other age groups, while the total protein concentration did not show any significant change with age. Parasitology
Nubian Goats; Haematological; Protein; Northern Sudan