| Autor: |
Soede NM; Animal Sciences Group, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands. nicoline.soede@wur.nl, van Sleuwen MJ, Molenaar R, Rietveld FW, Schouten WP, Hazeleger W, Kemp B |
| Jazyk: |
angličtina |
| Zdroj: |
Animal reproduction science [Anim Reprod Sci] 2006 Nov; Vol. 96 (1-2), pp. 133-45. Date of Electronic Publication: 2006 Jan 19. |
| DOI: |
10.1016/j.anireprosci.2005.12.004 |
| Abstrakt: |
It is generally assumed that stress around oestrus and during early pregnancy reduces reproductive performance of pigs. In our experiment, late prepuberal gilts (age at arrival 225+/-6 days) were housed in groups of four. Stress treatment consisted of once weekly regrouping and twice weekly feed competition of the 28 Stress gilts during 6 consecutive weeks, starting 13 days after arrival. Control gilts (n=28) were not treated. During the 0.5-1.5h after regroupings, Stress animals fought consistently more than the Control animals; up to 13 of the Stress animals fought for at most 60% of the time compared to one Control animal fighting for at most 3.3% of the time. The day before first regrouping, gilts had on average 4.0+/-0.9 skin scratches. By week 6, this number had reduced to 2.1+/-1.0 in Control, but remained 4.0+/-1.3 in Stress gilts (P<0.05). In the afternoon after regroupings, skin scratches increased up to 6.3+/-1.6 in the Stress gilts. Saliva cortisol in the afternoon before regrouping did not differ between weeks 1, 3 and 6, nor did it differ between Stress and Control. In Stress gilts, saliva cortisol was increased in the afternoon of first regrouping, in Batch 2 only (from 1.8+/-0.4 to 4.1+/-0.9 ng/ml; P<0.05). Animals showing a second oestrus within 5 weeks after arrival were inseminated. Duration of second oestrus of these animals was 2.48+/-0.66 days in the Stress gilts (n=24) and 2.21+/-0.58 days in the Control gilts (n=22; P>0.10). At Day 35 after insemination, pregnancy rate was 100% in both groups. Ovulation rate and number of total and vital fetuses was similar (P>0.10). The Stress treatment during a 6-week period around insemination consistently resulted in fighting but did not result in long term effects on cortisol levels and did not impair reproductive performance. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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Full Text from ScienceDirect