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Titolo:
THE EFFECT OF REPEATED BOAR EXPOSURE ON CORTISOL SECRETION AND REPRODUCTION IN GILTS
Autore:
TURNER AI; HEMSWORTH PH; HUGHES PE; CANNY BJ; TILBROOK AJ;
Indirizzi:
MONASH UNIV,DEPT PHYSIOL CLAYTON VIC 3168 AUSTRALIA MONASH UNIV,DEPT PHYSIOL CLAYTON VIC 3168 AUSTRALIA AGR VICTORIA,VICTORIAN INST ANIM SCI WERRIBEE VIC 3030 AUSTRALIA UNIV MELBOURNE,DEPT AGR & RESOURCES MANAGEMENT PARKVILLE VIC 3052 AUSTRALIA
Titolo Testata:
Animal reproduction science
fascicolo: 2, volume: 51, anno: 1998,
pagine: 143 - 154
SICI:
0378-4320(1998)51:2<143:TEORBE>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE STRESS; SEXUAL-BEHAVIOR; FEMALE PIGS; MALE-RATS; SERUM LH; PROLACTIN; CORTICOSTEROIDS; ESTRUS;
Keywords:
PIG, ENDOCRINOLOGY; ESTROUS DETECTION; STRESS; CORTISOL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
A.I. Turner et al., "THE EFFECT OF REPEATED BOAR EXPOSURE ON CORTISOL SECRETION AND REPRODUCTION IN GILTS", Animal reproduction science, 51(2), 1998, pp. 143-154

Abstract

It has been proposed that short-term activation of the hypothalamo-pituitary adrenal axis, with a consequent increase in the secretion of cortisol, may disrupt the endocrine events prior to ovulation and thereby impair reproduction in females. We investigated this concept in gilts in which oestrus was detected by introduction to boars, where intense physical contact is possible, or by applying pressure to the back of gilts (back-pressure test) during fence-line exposure to boars, where intense physical contact is prohibited. We expected that there wouldbe a greater release of cortisol and that reproduction would be inhibited in gilts introduced to boars compared to gilts in which the back-pressure test was used. As expected, introduction of gilts to boars resulted in a significant transient increase in plasma concentrations ofcortisol while there was no significant effect of using the back-pressure test on plasma cortisol. Nevertheless, introduction of gilts to boars did not impair reproduction and there was no effect of method of detecting oestrus on duration of oestrus, sexual receptivity, fertility or fecundity. The length of the oestrous cycle was decreased and ovulation rate increased in gilts that were introduced to boars compared to gilts that underwent the back-pressure test, indicating that introduction of gilts to boars may have stimulated these aspects of reproduction. These stimulatory effects may have been due to an increased exposure of gilts to sexual behaviour and stimuli from boars when introduced to boars and/or to stimulatory effects of the hypothalamo-pituitaryadrenal axis on some aspects of reproduction. (C) 1998 Elsevier Science B.V.

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Documento generato il 24/09/20 alle ore 01:47:37