Blood cell morphology of Testudo hermanni boettgeri Mojsisovics 1889 wild populations from Serbia

Examining tortoises' blood cell parameters in natural populations could be useful for monitoring their health status. The current study examines the blood cell morphology of Eastern Hermann's tortoise in populations inhabiting three distinct locations in Serbia: Cermor, Gonjiste, and Kunovica. We analyzed the number and morphometric parameters of different types of peripheral blood cells, including their length, width, and cell and nuclear size, and compared blood cell morphology across populations, sexes, and seasons (spring and summer). Our findings revealed significant variations in erythrocyte and lymphocyte morphometry among Eastern Hermann's tortoises from different populations and sexes, highlighting the influence of these factors on blood cell characteristics. Seasonal differences were observed in lymphocyte and thrombocyte counts, emphasizing the dynamic nature of hematological parameters in these tortoises. Additionally, alterations in erythrocyte cytoplasm were observed, suggesting potential pathological conditions. Establishing reference hematological intervals for healthy wild populations is crucial for monitoring health status, identifying early indicators of stress or disease, and guiding conservation efforts for Eastern Hermann's tortoises. Our results contribute to the general knowledge of the blood cell characteristics of Hermann's tortoise and provide insights into potential population-level differences in their physiology.