Abstract
The blood analysis of the great tit in a protected area of National Nature Park “Homilshanski Forests” (Kharkiv Region, Ukraine) was performed in the age-related dynamics of its postembryogenesis. Using our own method, developed for collecting venous blood from the eye sinus, the identity of leukogram percentages between the literary data and our obtained results was established thereby providing evidence in favour of the application of our development. Erythrocytes were studied with the help of the micronucleus test, which results reliably testify that the studied birds were not exposed to any chemical or physical contamination. No parasitic infections were found in blood smears. Further improvement of the blood taking method is planned in order to collect samples for biochemical and genetic analyses
Highlights
Birds, being consumers of higher orders, are very sensitive to the impact of anthropogenic factors and often viewed as specific biological indicators of environmental quality [1]
We studied 21 individuals of Parus major, includ
As the bird age increases, the number of leukocytes is almost doubled. This significant growth occurs at the expense of the increase of lymphocytes and decrease of eosinophils, forming the so-called system of physiological decussations at the moment of physiological maturity and at the beginning of egg-laying
Summary
Birds, being consumers of higher orders, are very sensitive to the impact of anthropogenic factors and often viewed as specific biological indicators of environmental quality [1]. The great tit is an optimal model species [2, 3], inhabiting both urban and forest areas. In literature we have found that Parus major can be a reservoir and carrier of many socially dangerous diseases, including ornithosis [4]. In this regard, the bird diseases, including those of the great tit, require timely and thorough diagnostics
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