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Diet density in rearing and reproductive phases influences carcass composition, pregnancy rate and litter performance of primiparous rabbit does

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Diet density in rearing and reproductive phases influences carcass composition, pregnancy rate and litter performance of primiparous rabbit does

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dc.contributor.author Teixeira, Paulo Sérgio dos Santos es_ES
dc.contributor.author Moura, Ana Silvia A.M.T. es_ES
dc.contributor.author Wechsler, Francisco S. es_ES
dc.contributor.author Fernandes, Simone es_ES
dc.contributor.author Mattaraia, Vânia G.M. es_ES
dc.date.accessioned 2017-07-10T09:39:19Z
dc.date.available 2017-07-10T09:39:19Z
dc.date.issued 2017-06-28
dc.identifier.issn 1257-5011
dc.identifier.uri http://hdl.handle.net/10251/84822
dc.description.abstract [EN] The objective was to evaluate the effect of the interaction of diet density in the rearing phase×diet density in the reproductive phase on carcass composition, pregnancy rate, and litter performance of primiparous rabbit does. The experiment followed a 2×2×2 factorial (2 seasons, 2 diet densities in the rearing phase and 2 diet densities in reproductive phase, that is, from mating to weaning of the first litter). The reference diet (RD) contained 184 g/kg of crude protein (CP), 165 g/kg of acid detergent fibre (ADF) and 10.5 MJ/kg of digestible energy (DE). The low-density diet (LD) had 147 g/kg of CP, 24 g/kg of ADF and 8.4 MJ/kg of DE. The treatments were applied from 70 d of age until weaning of the first litter at 35 d of age. Ninety-six females from the Botucatu Genetic Group (24 females/experimental group) were mated at 142 d of age. On day 12 of gestation, 23 does were slaughtered to evaluate weights of carcass, organs and dissectible fat, and embryo implantation rate. No effects of diet density in the rearing or in the reproductive phases were detected on feed intake of does during the reproductive phase. Does fed LD during the rearing phase showed lower body weight at mating (3574±47 vs. 3866±43 g, P=0.0001) and during most of the reproductive phase, but they lost less weight in the peripartum. Perirenal fat was lighter in these does (72.8±10.0 vs. 102.1±9.6 g, P=0.048) and they showed a lower pregnancy rate (76.1 vs. 91.7%, P=0.045). The does fed RD in the reproductive phase were heavier during this phase (4055±40 g vs. 3887±41 g, P=0.0044). The does fed LD in rearing phase and RD in the reproductive phase showed larger litters at weaning, due to decreased kit mortality, than those fed RD in both phases (6.16±0.47 vs. 3.93±0.71, P=0.0361). Litters were lighter at weaning when LD was fed in the reproductive phase (3582±201 vs. 4733±187, P<0.0001). Feeding a low-density diet during the rearing phase and a reference diet during the reproductive phase is the best alternative to improve reproductive performance at the first parity. es_ES
dc.language Inglés es_ES
dc.publisher Universitat Politècnica de València
dc.relation.ispartof World Rabbit Science
dc.rights Reserva de todos los derechos es_ES
dc.subject Embryo implantation rate es_ES
dc.subject Litter size es_ES
dc.subject Perirenal fat es_ES
dc.subject Pregnancy rate es_ES
dc.subject Rabbit es_ES
dc.title Diet density in rearing and reproductive phases influences carcass composition, pregnancy rate and litter performance of primiparous rabbit does es_ES
dc.type Artículo es_ES
dc.date.updated 2017-07-10T07:28:27Z
dc.identifier.doi 10.4995/wrs.2017.6509
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Teixeira, PSDS.; Moura, ASA.; Wechsler, FS.; Fernandes, S.; Mattaraia, VG. (2017). Diet density in rearing and reproductive phases influences carcass composition, pregnancy rate and litter performance of primiparous rabbit does. World Rabbit Science. 25(2):147-158. https://doi.org/10.4995/wrs.2017.6509 es_ES
dc.description.accrualMethod SWORD es_ES
dc.relation.publisherversion https://doi.org/10.4995/wrs.2017.6509 es_ES
dc.description.upvformatpinicio 147 es_ES
dc.description.upvformatpfin 158 es_ES
dc.description.volume 25
dc.description.issue 2
dc.identifier.eissn 1989-8886


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