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Management factors associated with sow reproductive performance after weaning

Ellen de Jong (UGent) , Maria Laanen (UGent) , Jeroen Dewulf (UGent) , J Jourquin, Aart de Kruif (UGent) and Dominiek Maes (UGent)
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Abstract
Contents To achieve optimal reproductive performance in pig herds, sows need to become pregnant as soon as possible after weaning. The aim of this study was to investigate herd and management factors associated with reproductive performance of sows after weaning. A questionnaire pertaining to sow management at weaning and herd reproductive data were collected from 76 randomly selected commercial pig herds in Belgium. Associations between the herd factors and two reproductive parameters after weaning (weaning-to-oestrous interval: WEI and percentage of repeat breeders: RB) were analysed using general linear mixed models. A separated feeding strategy of breeding gilts from 60kg onwards was significantly associated with a shorter WEI (5.54 vs 7.28days; p=0.040). Factors significantly associated with a lower percentage of RB were housing the newly weaned sows separated from the gestating sows (7% vs 12%; p=0.003), using semen<4days after collection (79 vs 14%; p=0.014) and stimulating oestrus twice a day (8 vs 11%; p=0.025). In conclusion, some management practices, such as feeding strategy of breeding gilts, housing conditions of sows, method of oestrous stimulation and storage duration of semen, have an influence on the outcome of reproductive parameters such as weaning-to-oestrous interval and percentage of repeat breeders. These practices can be implemented rather easily by pig producers and may consequently lead to improvements of reproductive performance of sows after weaning.
Keywords
FARROWING RATE, COMMERCIAL FARMS, BOAR SEMEN, ESTRUS, PIGS, STRESS, GILTS

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MLA
de Jong, Ellen, Maria Laanen, Jeroen Dewulf, et al. “Management Factors Associated with Sow Reproductive Performance After Weaning.” REPRODUCTION IN DOMESTIC ANIMALS 48.3 (2013): 435–440. Print.
APA
de Jong, E., Laanen, M., Dewulf, J., Jourquin, J., de Kruif, A., & Maes, D. (2013). Management factors associated with sow reproductive performance after weaning. REPRODUCTION IN DOMESTIC ANIMALS, 48(3), 435–440.
Chicago author-date
de Jong, Ellen, Maria Laanen, Jeroen Dewulf, J Jourquin, Aart de Kruif, and Dominiek Maes. 2013. “Management Factors Associated with Sow Reproductive Performance After Weaning.” Reproduction in Domestic Animals 48 (3): 435–440.
Chicago author-date (all authors)
de Jong, Ellen, Maria Laanen, Jeroen Dewulf, J Jourquin, Aart de Kruif, and Dominiek Maes. 2013. “Management Factors Associated with Sow Reproductive Performance After Weaning.” Reproduction in Domestic Animals 48 (3): 435–440.
Vancouver
1.
de Jong E, Laanen M, Dewulf J, Jourquin J, de Kruif A, Maes D. Management factors associated with sow reproductive performance after weaning. REPRODUCTION IN DOMESTIC ANIMALS. 2013;48(3):435–40.
IEEE
[1]
E. de Jong, M. Laanen, J. Dewulf, J. Jourquin, A. de Kruif, and D. Maes, “Management factors associated with sow reproductive performance after weaning,” REPRODUCTION IN DOMESTIC ANIMALS, vol. 48, no. 3, pp. 435–440, 2013.
@article{3563231,
  abstract     = {Contents To achieve optimal reproductive performance in pig herds, sows need to become pregnant as soon as possible after weaning. The aim of this study was to investigate herd and management factors associated with reproductive performance of sows after weaning. A questionnaire pertaining to sow management at weaning and herd reproductive data were collected from 76 randomly selected commercial pig herds in Belgium. Associations between the herd factors and two reproductive parameters after weaning (weaning-to-oestrous interval: WEI and percentage of repeat breeders: RB) were analysed using general linear mixed models. A separated feeding strategy of breeding gilts from 60kg onwards was significantly associated with a shorter WEI (5.54 vs 7.28days; p=0.040). Factors significantly associated with a lower percentage of RB were housing the newly weaned sows separated from the gestating sows (7% vs 12%; p=0.003), using semen<4days after collection (79 vs 14%; p=0.014) and stimulating oestrus twice a day (8 vs 11%; p=0.025). In conclusion, some management practices, such as feeding strategy of breeding gilts, housing conditions of sows, method of oestrous stimulation and storage duration of semen, have an influence on the outcome of reproductive parameters such as weaning-to-oestrous interval and percentage of repeat breeders. These practices can be implemented rather easily by pig producers and may consequently lead to improvements of reproductive performance of sows after weaning.},
  author       = {de Jong, Ellen and Laanen, Maria and Dewulf, Jeroen and Jourquin, J and de Kruif, Aart and Maes, Dominiek},
  issn         = {0936-6768},
  journal      = {REPRODUCTION IN DOMESTIC ANIMALS},
  keywords     = {FARROWING RATE,COMMERCIAL FARMS,BOAR SEMEN,ESTRUS,PIGS,STRESS,GILTS},
  language     = {eng},
  number       = {3},
  pages        = {435--440},
  title        = {Management factors associated with sow reproductive performance after weaning},
  url          = {http://dx.doi.org/10.1111/rda.12093},
  volume       = {48},
  year         = {2013},
}

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