Seasonal Variations of Heamatological Profile and Its Correlations with Thyroid and Adrenal Gland Hormones in Male Moroccan Camel (Camelus dromedarius)
It is a well-established fact that thyroid and adrenal gland activities show seasonal variations and are considered crucial to sustain the productive performance in domestic animals. The study was carried out to investigate the effects of season on serum concentrations of total thyroxine, total triiodothyronine, cortisol, and some haematological factors [haematocrit, blood cells count, neutrophile to lymphocyte ratio (NLR) and haemolysis] and the correlations between these parameters in camels. Thyroid hormones (TH) and cortisol (COR) showed marked seasonal variation with a significant (P<0.05) increase during winter and a significant (P<0.05) decrease during summer. By comparison to summer, leukocytes count, neutrophils percentage, NLR and haemolysis were significantly (P<0.05) higher in winter than summer. However, erythrocytes count and lymphocytes percentage were significantly (P<0.05) lower in winter by comparison with summer. A significant correlation between TH and COR, and between these hormones and haemolysis and blood cells count was observed, suggesting that during winter the camel is submited to cold and rutt stress.
Camel, Cortisol, Haematological Profile, Thyroid Hormones
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