Dissertation/ Thesis
Relationship between backfat and reproductive performance in sows ; Mise en relation de l’épaisseur de lard dorsal et des performances de reproduction des truies
| العنوان: | Relationship between backfat and reproductive performance in sows ; Mise en relation de l’épaisseur de lard dorsal et des performances de reproduction des truies |
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| المؤلفون: | Lehmann, Camille |
| المساهمون: | École nationale vétérinaire d'Alfort (ENVA), Université Paris-Est Créteil Val-de-Marne - Faculté de médecine (UPEC Médecine), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Maxime Delsart |
| المصدر: | https://dumas.ccsd.cnrs.fr/dumas-04824076 ; Médecine vétérinaire et santé animale. 2021. |
| بيانات النشر: | CCSD |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Sow, Gilt, Prolificacy, Stillbirth, Reproduction, Backfat, Feeding, Animal Production, Médecine vétérinaire, Prolificité, Performance de reproduction, Alimentation, Production animale, Mortinatalité, Engraissement, Élevage Porcin, Truie, [SDV.BA.MVSA]Life Sciences [q-bio]/Animal biology/Veterinary medicine and animal Health |
| الوصف: | In order to examine the effect of backfat thickness and backfat variations during gestation (28 to 115 days) or lactation (from farrowing to weaning) of sows of different parities on subsequent reproductive performance (prolificacy and numbers of stillborns), the present trial was performed in France in an indoor sow breeding unit. Backfat measurements were taken at 28 days after artificial insemination, around farrowing and at weaning, for all sows during each cycle. A total of 847 gilts, 709 sows of rank 2, 1 040 sows of ranks 3 and 4 and 883 sows of ranks 5, 6 and 7 were measured. In order to have balanced numbers of animals, we grouped together some ranks. First, we searched for a link between backfat at different physiological stages and the number of piglets born and stillborn. Next, we searched for a link between variations in backfat thickness during gestation and lactation and their relationship to reproductive performance. We sorted the sows in categories based on their backfat thickness at each stage (lean, fair, fat). Sows of ranks 3 and above had the best prolificacy. Concerning backfat thickness at 28 days gestation, the “lean” sows of rank 5 and above had a higher prolificacy than the average of ranks 5 and above, while the “fat” has a lower prolificacy for the same ranks. On the one hand, “lean” sows of all ranks seemed to have a better prolificacy at farrowing, significantly at rank 3 and above while, on the other hand, “fat” sows of all ranks tended to have lower numbers of total newborns, significantly for ranks 5 and above. Gilts and sows of rank 2 gaining backfat during gestation had fewer total born than the other groups in the same age class. Those animals whose backfat does not change during gestation had a better prolificacy in gilts and sows of rank 3 and 4. Sows of rank 2 who lost backfat thickness during gestation had a better prolificacy than all rank 2 sows. Sows of rank 5 and above who lost more than 4 millimeters of backfat had a significantly lower prolificacy than the other sows ... |
| نوع الوثيقة: | master thesis |
| اللغة: | French |
| Relation: | PPN: 258048786 |
| الاتاحة: | https://dumas.ccsd.cnrs.fr/dumas-04824076 https://dumas.ccsd.cnrs.fr/dumas-04824076v1/document https://dumas.ccsd.cnrs.fr/dumas-04824076v1/file/A-2021-036.pdf |
| Rights: | http://hal.archives-ouvertes.fr/licences/copyright/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.BF2548CF |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |