Annual Research & Review in Biology

The aim of research is to determine the dynamics of platelets’ ability to aggregation in healthy Ireshire calves during the phase of dairy-vegetable nutrition. We examined 67 Ireshire calves of dairy-vegetable nutrition. We applied hematological and statistical methods of investigation in our research. At the age of 45 days the animals had short-time strengthening of aggregation in response to all the applied inductors. This strengthening of platelets’ aggregation in calves was removed by the 3^rd month of their life. They had the most active platelets’ aggregation in response to adenosine diphosphate. Platelets’ aggregation with collagen and ristomicin was less evident in them. Ireshire calves had strengthening of disaggregating platelets’ capabilities in response to all the applied inductors of aggregation by the 45^th day of life. But its evidence returned to the initial level by the end of observation. In the course of our research we determined the dynamics of indices of platelet hemostasis in Ireshire calves in the phase of dairy-vegetable nutrition. Short-time strengthening of platelets’ activity in calves of this breed at the beginning of observation has in its basis the processes of adaptation to changing of nutrition character.