[Selected biogenic elements in the blood of hares (Lepus europaeus Pall.)]

Blood samples were collected through aortic punctures in hares coming from different agricultural regions. Base biogenic elements (Ca, P, Mg, Na, K, chlorides) were determined in blood plasma not showing haemolysis. The values obtained in hares born and kept in captivity are presented for the purposes of comparison. Changes in element levels are described for different pollution load of ecosystems, from physiological aspects for more advanced stages of gravidity, for a higher lactation number and for young growth. The problems of qualitative fasting of hares can also be documented by mineral contents in blood plasma. The levels of some elements were evaluated for a group of adult male and female hares, and the youngs regardless of their sex until the disappearance of Stroh's outgrowth. The results were processed statistically and are summarized in tables (Tabs. 1-12) and they are compared with available literature.