Study of the formation of the morphophysiological status of the blood of Tashla sheep depending on age and functional state

Purpose: to study the development of morphophysiological blood parameters (status) in purebred Tashla sheep raised in an industrial complex, as well as depending on the age and functional state of the mothers who gave birth to them.
Materials and methods. The experiment involved 8 Tashla ewes of the first lambing and 8 lambs obtained from them, as well as 8 Tashla ewes of the third lambing and 8 lambs obtained from them. For the studies, blood samples were collected from 16 lambs and 16 ewes in dynamics at the following time intervals corresponding to the age from birth of the lambs: 30, 60 and 90 days from birth for lambs, and 90 days after birth for ewes, which corresponded to a certain physiological development of the lambs and the functional state of the ewes. The blood of the animals was collected by jet blood flow into test tubes with EDTA. For the study of morphophysiological parameters, the blood was cooled to +4 °C. Blood samples from lambs and sheep were tested for the following parameters: WBC (white blood cells, the main immune cells), RBC (red blood cells, responsible for oxygen transport), HGB (hemoglobin, the main protein component of red blood cells), HCT (hematocrit, or the percentage of red blood cell volume to the total blood volume), MCV (mean corpuscular volume), MCH (mean corpuscular hemoglobin content), MCHC (mean corpuscular hemoglobin concentration), RDW (red blood cell distribution width, an indicator of red blood cell heterogeneity by volume, characterizes the degree of anisocytosis), PLT (platelets, blood elements responsible for the formation of a thrombotic clot during bleeding), MPV (mean corpuscular volume), PDW (red blood cell distribution width, an indicator of platelet heterogeneity, shows which cell forms predominate), PCT (platelet crit, reflects percentage of platelets in whole blood).
Results. The results obtained showed that in Tashla lambs during the suckling period, the morphophysiological picture of the blood is actively developing. Certain patterns of age-related changes in the morphophysiological parameters of the blood of lambs with age, as well as some features of those in sheep of different functional states (sheep of the first and third lambing) were revealed. A qualitative difference in the parameters in animals of the same age, but different functional states, is noted for the MCV, MCH, RDW, MPV, PDW, PCT, and only in adults. Reliable differences in changes in the morphophysiological parameters of the blood are observed in lambs with age. The morphophysiological parameters of the blood of Tashla sheep play a special role and are of key importance in the process of assessing the physiological status of their body, and also demonstrate that its formation occurs in the period from the 60th to the 90th day after birth. 

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