REGULATION MECHANISMS OF CORTISOL LEVEL IN PIGS’ BLOOD SERUM UNDER STRESS
O. V. Danchuk, V. I. Karpovskyі, V. О. Trokoz, R. V. Postoі
National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
The results of investigation the relationship and mutual influence
of main features of cortical processes with cortisol level
in pigs’ blood serum under technological stress are shown.
Technological stress is accompanied by increase concentrations
of this hormone in pigs’ blood serum in 2.3–2.7 times
depending on the typological characteristics of its nervous
system. In animals of weak type of higher nervous activity
during one month after exposure to technological stimulus
the cortisol level was significantly higher from such in animals of strong types of higher nervous activity. Stress affects
(F=1803>FU=2.2; P<0.001) the content of this hormone in
pigs’ blood serum more than the type of higher nervous activity
(F=45.1>FU=2.27; P<0.001). With increase of strength and
balance of cortical processes the cortisol level in blood of animals
decreases (r=-0.58–0.76; P<0.01–0.001). Established the
significant interaction between typological features of higher
nervous activity and technological stimulus (F=38.8>FU=1.76;
P<0.001), which indicates a possible change in the strength,
balance and mobility of the nervous processes under the influence
of the stress factor.
Cortisol, higher nervous activity, pigs, stress
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