• V. Pryshedko Dnipropetrovsk State Agrarian and Economic University, Dnipropetrovsk
  • O. Chernenko Dnipropetrovsk State Agrarian and Economic University, Dnipropetrovsk
Keywords: adaptation of quality, type of stress, the bulls of Holstein breed, blood concentration of hormones, activity of enzymes of blood


Investigated the adaptation of quality bulls of Holstein breed. After the process loads low-latitude animals was noted by an increase in blood cortisol concentration 6,5 times, the testosterone – 80,2%, activity creatinphosphokinase (CPK) – by 27,9%, indicating a strong stress response in their body and consequently lower adaptive capacity compared with animals of the opposite type. It is found that in stress the concentration of cortisol, testosterone and CPK activity in the blood of all experimental bulls was within the reference norms. Studies of blood after the action of stress detected the growth of these indicators. Note that the greatest hormonal changes in the blood of all experimental animals established by the cortisol concentration. It shows the development of the stress response in their body. However, the state of tension was significantly stronger in animals low-latitude type in which the concentration of this hormone after stress load increased 6,5 times. Both high manufacturers reacted to stress less sharp increase of cortisol in 2,1 times, i.e. showed better adaptability in comparison with animals of the opposite type. Similar dependence was established and by the dynamics of testosterone concentration in the blood of bulls grew by 16,9%, and risk strategy – 80,2%. Increasing the concentration of testosterone in the blood under the influence of technological loads indicates the presence of stressful reactions in the body, because it stands out except the testes and also supports glands, as cortisol during stress. A similar trend was observed in dynamics of activity of KFK, which in high latitude manufacturers only increased slightly (3,7%), but in risk strategy – by 27,9 %, which indicates the state of stress in the body. When you stress from brain substance of adminiculary glands liberate noradrenaline and adrenaline, which mobilizes glucose reserves from the liver by breakdown of glycogen contained in it. Therefore, the increase of glucose in the blood of animals under the action of stress-factors indicates a high stress response. After stress in experimental bulls showed an increase of glucose concentration in the cow, and the animals high latitude type differed large values of this indicators in comparison with animals of the opposite type. Among the signs of blood, revealing the level of stress response are important enzymes: aspartate and alanine aminotransferase. They play an important role in metabolic processes involved in reactions of transamination and have a greater catalytic activity. It is established that the activity of enzymes of blood serum of experimental animals in stratocumuli bulls were significantly higher than in animals of the opposite type. That is, metabolic processes and the level of stress in their body were more substantial than in high latitude animals. Therefore, farm animals are constantly under the influence of different environmental factors to which they must adapt. Because adaptation to stressful effects associated with high energy costs, animals that have an increased reactivity to the action of stress-factors that consume energy in feed less on performance and more on overcoming stress that the bulls may have a negative impact on their spermproducing and quality of sperm. Thus, it is established that the best adaptive qualities characterized holsztynski bulls vysokoshirotnoi type, which under the action of technological stress showed a significantly lower reactivity, in contrast to animals of the opposite type. Given we have identified the dynamics of hormonal shifts and performance under the influence of technological loads in the long term it is advisable to study the parameters of semen sires, depending on the concentration in blood of hormones and enzyme activity.


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Author Biographies

V. Pryshedko, Dnipropetrovsk State Agrarian and Economic University, Dnipropetrovsk
к. с.-г. н., доцент
O. Chernenko, Dnipropetrovsk State Agrarian and Economic University, Dnipropetrovsk
к. с.-г. н., доцент


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How to Cite
Pryshedko, V., & Chernenko, O. (1). EVALUATION OF ADAPTIVE QUALITIES PROGENITOR BULL OF HOLSTEIN BREED. Theoretical and Applied Veterinary Medicine, 4(1), 202-206. Retrieved from https://bulletin-biosafety.com/index.php/journal/article/view/126