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dc.contributor.authorBabot Gaspa, Daniel
dc.contributor.authorChavez, Eduardo R.
dc.contributor.authorNoguera Jiménez, José Luis
dc.date.accessioned2010-09-27T10:55:37Z
dc.date.available2010-09-27T10:55:37Z
dc.date.issued2003
dc.identifier.issn1627-3591
dc.identifier.urihttp://hdl.handle.net/10459.1/10991
dc.description.abstractThe effect of age at the first mating and herd size were evaluated in the reference Spanish Databank (BDporc) of 37 698 sows born between 1991 and 1995 and with individual lifetime records. The data included dates of births at entrance and culling, first mating, repetitive mating and conception, first farrowing and weaning records. Individual records were validated before the analysis by screening them through a tolerance “filter” in order to eliminate the extreme values from the analysis. The total database of the sows was classified in 7 classes according to age at the first mating (< 210, 210–220, 221–230, 231–240, 241–250, 251–270, and > 270 days) and in 6 classes of herd size (< 200, 200–300, 301–400, 401–600, 601–800, and > 800 sows). The total number of litters and number of weaned piglets obtained from each sow during the lifetime production were significantly (P < 0.05) greater for gilts between 221 and 240 d of age at the first mating. There was a significant (P < 0.001) effect of the herd size on the reproductive performance of the sow, and the best performance was obtained with herds with 401 to 600 sows compared to < 200 or > 800 sow-herds. Furthermore, a significant (P < 0.001) interaction between age at the first mating and herd size was detected and can be associated with a particular pattern for the herd size class 401–600 sows with the best performances obtained for the sows first mated at less than 200 days. For the other herd sizes, the results indicated that sows mated for the first time at the right age, 221–240 days, are more productive, both in the number and size of the parities throughout lifetime production.ca_ES
dc.language.isoengca_ES
dc.publisherInstitut national de la recherche agronomique (França)ca_ES
dc.publisherEDP Sciencesca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1051/animres:2003001ca_ES
dc.relation.ispartofAnimal Research, 2003, vol. 52, núm. 1, p. 49-64ca_ES
dc.rights(c) Institut national de la recherche agronomique (França), 2003ca_ES
dc.rights(c) EDP Sciences, 2003ca_ES
dc.subjectAge at first matingca_ES
dc.subjectSowca_ES
dc.subjectPigsca_ES
dc.subjectproductivityca_ES
dc.subject.otherPorcs -- Cria i desenvolupamentca_ES
dc.subject.otherTruges -- Cria i desenvolupamentca_ES
dc.titleThe effect of age at the first mating and herd size on the lifetime productivity of sowsca_ES
dc.typearticleca_ES
dc.identifier.idgrec001657
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1051/animres:2003001


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