Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 4

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  oddzielenie od stada
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
In 15 pigs subjected to the stress of isolation, immobilization and slaughter, the c-reactive protein, ceruloplasmine, total protein level, gamma-globulin fractions, as well as lysozyme activity in the sera were tested. It was determined that the stres connected with slaughter does not effect changes in the concentration of acute phase protein (APP), while total protein levels as well as gamma globulin fractions are lowered both during immobilization and stress. Lysozyme activity in the sera rises during the isolation of the pigs, which may indicate the mobilization of uncharacteristic defence mechanisms.
In the performed experiments the response of sympatho-adrenal and hypothalamo-pituitary-adrenal system was evaluated in sheep stressed by repeated isolation from the flock. Immature female sheep of the Polish Mountain breed were used. They were divided into control and experimental (isolated) groups, each of 10 animals. The sheep of the experimental group were isolated individually, three times for 180 min in 24h intervals. The blood was taken 30 minutes before, and 10, 30, 60 and 180 minutes after onset of isolation stress by means of cannula inserted into jugular vein. The activity of the sympatho-adrenal system was demonstrated by the plasma level of adrenaline (A) and noradrenaline (NA) and activity of the hypothalamo-pituitary-adrenal system by plasma level of cortisol. The concentration of catecholamines and cortisol were determined by the REA and RIA method, respectively. The highest concentration of the determined hormones was observed during the first isolation stress. The maximal level of catecholamines appeared at 10 min and cortisol between 30 and 60 min of stress. The patterns of increment in successive isolations were not altered, only the maximal levels of the hormones were reduced; the highest decline was noted in A level in lower NA and cortisol concentrations. These changes were determined by the calculated mean integrated responses; for A they were seven times and for NA and cortisol two times lower, compared to the first isolation. It is concluded that repeated isolation stress performed in similar time intervals leads to a systematic reduction of the response of sympatho-adrenal and hypothalamo-pituitary-adrenal system. This indicates a development of adaptation processes to the applied stressor.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.