| Title: | Effect of backfat loss during lactation on weaning-to-oestrus interval of sows at gonadotropin application |
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| Authors: | ID Škorjanc, Dejan (Author)
ID Hohler, Marko (Author)
ID Brus, Maksimiljan (Author) |
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| Files: |  Archives_Animal_Breeding_2008_Skorjanc,_Hohler,_Brus_Effect_of_backfat_loss_during_lactation_on_weaning-to-oestrus_interval_of_sows_at_g.pdf (185,14 KB)
MD5: AA5D0551A717F78D9211E5BA1CE27F76
PID: 20.500.12556/dkum/44826c8c-516d-48a6-ade7-4d00180a6ef9
 http://www.archanimbreed.com/content/2008/abs08_06.html#A5
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKBV - Faculty of Agriculture and Life Sciences
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| Abstract: | A total of 984 primiparous and multiparous crossbred sows (Swedish Landrace × Large White) housed on a commercial pig farm were used to study the effect of the decrease in backfat thickness during lactation and the level of backfat at weaning on weaning-to-oestrus interval and conception rate of sows. Primiparous sows (n=213) received a single injection of 400 IU eCG + 200 IU hCG (PG600®, Intervet) at weaning and approximately 30 % of sows did not respond to the first treatment. First-farrowing sows produced significantly fewer live-born piglets, had markedly thinner backfat in late gestation, showed significant loss of backfat thickness during lactation and showed thinner backfat at weaning than sows with a greater number of parities. Primiparous sows with backfat thinner than 18 mm at weaning lost an average of 21 % of backfat during lactation and had a significantly longer weaning-to-oestrus interval (31.75 ± 2.22 days), even after a second treatment with PG600®, than both primiparous sows which responded to the first treatment (5.95 ± 0.16 days) and multiparous sows which were not treated (5.19 ± 0.12 days). The primiparous and multiparous sows with thicker backfat at farrowing also had thicker backfat at weaning (r=0.874 and r=0.938 for primiparous and multiparous sows, respectively). Sows with thicker backfat at weaning showed a shorter weaning-to-oestrus interval and this correlation was higher for primiparous than for multiparous sows (r=-0.192 and r=-0.100, respectively). Thicker backfat of the sows at weaning was moderately but significantly correlated with lower loss of backfat during lactation (r=-0.179 and r=-0.273 for primiparous and multiparous sows, respectively). The present study showed that monitoring of backfat thickness and loss of backfat during lactation represents a useful tool to decrease non-productive days and improve the efficiency of high-producing pig herds. |
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| Keywords: | sow, gilts, backfat thickness, backfat loss, weaning to oestrus interval, conception rate, PG600 |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2008 |
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| Number of pages: | str. 560-571 |
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| Numbering: | Letn. 51, št. 6 |
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| PID: | 20.500.12556/DKUM-66958  |
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| ISSN: | 0003-9438 |
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| UDC: | 636.4 |
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| ISSN on article: | 0003-9438 |
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| COBISS.SI-ID: | 2715948 |
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| NUK URN: | URN:SI:UM:DK:KXHLTJOD |
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| Publication date in DKUM: | 20.07.2017 |
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| Views: | 1332 |
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| Downloads: | 443 |
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| Metadata: |    |
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| Categories: | Misc.
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