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Responses of pigs divergently selected for cortisol response or feed efficiency to an ACTH challenge
- Source :
- 68. Annual Meeting of the European Association for Animal Production (EAAP), 68. Annual Meeting of the European Association for Animal Production (EAAP), Aug 2017, Tallinn, Estonia. Wageningen Academic Publishers, 2017, Annual Meeting of the European Association for Animal Production, Book of Abstract of the 68th Annual Meeting of the European Federation of Animal. 1ère Ed. (23), 2017; 68. Annual Meeting of the European Association for Animal Production (EAAP), Tallinn, EST, 2017-08-28-2017-09-01, 240-240, 68. Annual Meeting of the European Association for Animal Production (EAAP), Aug 2017, Tallinn, Estonia. Wageningen Academic Publishers, Annual Meeting of the European Association for Animal Production, 23 (1ère Ed.), 2017, Annual Meeting of the European Association for Animal Production
- Publication Year :
- 2017
- Publisher :
- HAL CCSD, 2017.
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Abstract
- Selection for feed efficiency can impair the animal’s ability to respond to stress. A key driver of this response is the hypothalamo-pituitary-adrenal (HPA) axis, which releases cortisol in response to stressors. Injection of a normalized dose of adrenocorticotropic hormone (ACTH) to stimulate cortisol release by the adrenal cortex is a standardized method to evaluate the activity of the HPA axis independently of the animal’s perception of stress. It has been used to select during three generations a highCortisol line and a lowCortisol line, that had divergent cortisol levels 1 h after ACTH injection (H1, peak of the response). A trial was set up to compare the responses to ACTH of these two lines and those of two other lines divergently selected for residual feed intake (RFI, measure of net feed efficiency) during nine generations. At 6 weeks of age, 48 pigs per line were tested. Blood samples were collected before and 1 (H1) and 4 h after injection (H4) when cortisol is expected to return to basal level. In the Cortisol lines, plasma cortisol was multiplied by 2 (P
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- 68. Annual Meeting of the European Association for Animal Production (EAAP), 68. Annual Meeting of the European Association for Animal Production (EAAP), Aug 2017, Tallinn, Estonia. Wageningen Academic Publishers, 2017, Annual Meeting of the European Association for Animal Production, Book of Abstract of the 68th Annual Meeting of the European Federation of Animal. 1ère Ed. (23), 2017; 68. Annual Meeting of the European Association for Animal Production (EAAP), Tallinn, EST, 2017-08-28-2017-09-01, 240-240, 68. Annual Meeting of the European Association for Animal Production (EAAP), Aug 2017, Tallinn, Estonia. Wageningen Academic Publishers, Annual Meeting of the European Association for Animal Production, 23 (1ère Ed.), 2017, Annual Meeting of the European Association for Animal Production
- Accession number :
- edsair.dedup.wf.001..47fbc9ac8cfa908efd9176be48d84381