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Different resource allocation strategies result from selection for litter size at weaning in rabbit does

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Different resource allocation strategies result from selection for litter size at weaning in rabbit does

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dc.contributor.author Savietto, Davi es_ES
dc.contributor.author Cervera Fras, Mª Concepción es_ES
dc.contributor.author Ródenas Martínez, Luis es_ES
dc.contributor.author Martínez Paredes, Eugenio Melchor es_ES
dc.contributor.author Baselga Izquierdo, Manuel es_ES
dc.contributor.author García Diego, Fernando Juan es_ES
dc.contributor.author Larsen, T. es_ES
dc.contributor.author Friggens, Nicholas Charles es_ES
dc.contributor.author Pascual Amorós, Juan José es_ES
dc.date.accessioned 2016-05-17T12:25:08Z
dc.date.available 2016-05-17T12:25:08Z
dc.date.issued 2014-04
dc.identifier.issn 1751-7311
dc.identifier.uri http://hdl.handle.net/10251/64260
dc.description.abstract This study examined the effect of long-term selection of a maternal rabbit line, solely for a reproductive criterion, on the ability of female rabbits to deal with constrained environmental conditions. Female rabbits from generations 16 and 36 (n = 72 and 79, respectively) of a line founded and selected to increase litter size at weaning were compared simultaneously. Female rabbits were subjected to normal (NC), nutritional (NF) or heat (HC) challenging conditions from 1st to 3rd parturition. Animals in NC and NF were housed at normal room temperatures (18°C to 25°C) and respectively fed with control (11.6 MJ digestible energy (DE)/kg dry matter (DM), 126 g digestible protein (DP)/kg DM, and 168 g of ADF/kg DM) or low-energy fibrous diets (9.1 MJ DE/kg DM, 104 g DP/kg DM and 266 g ADF/kg DM), whereas those housed in HC were subjected to high room temperatures (25°C to 35°C) and the control diet. The litter size was lower for female rabbits housed in both NF and HC environments, but the extent and timing where this reduction took place differed between generations. In challenging conditions (NF and HC), the average reduction in the reproductive performance of female rabbits from generation 16, compared with NC, was &#8722;2.26 (P<0.05) and &#8722;0.51 kits born alive at 2nd and 3rd parturition, respectively. However, under these challenging conditions, the reproductive performance of female rabbits from generation 36 was less affected at 2nd parturition (&#8722;1.25 kits born alive), but showed a greater reduction at the 3rd parturition (&#8722;3.53 kits born alive; P<0.05) compared with NC. The results also showed differences between generations in digestible energy intake, milk yield and accretion, and use of body reserves throughout lactation in NC, HC and NF, which together indicate that there were different resource allocation strategies in the animals from the different generations. Selection to increase litter size at weaning led to increased reproductive robustness at the onset of an environmental constraint, but failure to sustain the reproductive liability when the challenge was maintained in the long term. This response could be directly related to the shortterm environmental fluctuations (less severe) that frequently occur in the environment where this line has been selected. es_ES
dc.description.sponsorship The authors thank Professor Enrique Blas Ferrer for his valuable comments on the initial version of this document, Juan Carlos Moreno for his help in conducting the trial at the experimental farm, and the Ministry of Economy and Competitiveness (Project: AGL2011-30170-C02-01) for economic support. en_EN
dc.language Inglés es_ES
dc.publisher Cambridge University Press (CUP): STM Journals es_ES
dc.relation Ministry of Economy and Competitiveness/AGL2011-30170-C02-01 es_ES
dc.relation.ispartof Animal es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Rabbit does es_ES
dc.subject Selection for litter size es_ES
dc.subject Robustness es_ES
dc.subject Heat stress es_ES
dc.subject Feeding restriction es_ES
dc.subject.classification PRODUCCION ANIMAL es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.subject.classification NUTRICION Y BROMATOLOGIA es_ES
dc.title Different resource allocation strategies result from selection for litter size at weaning in rabbit does es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1017/S1751731113002437
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ciencia Animal - Departament de Ciència Animal es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Ciencia y Tecnología Animal - Institut de Ciència i Tecnologia Animal es_ES
dc.description.bibliographicCitation Savietto, D.; Cervera Fras, MC.; Ródenas Martínez, L.; Martinez Paredes, EM.; Baselga Izquierdo, M.; García Diego, FJ.; Larsen, T.... (2014). Different resource allocation strategies result from selection for litter size at weaning in rabbit does. Animal. 8(4):618-628. doi:10.1017/S1751731113002437 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1017/S1751731113002437 es_ES
dc.description.upvformatpinicio 618 es_ES
dc.description.upvformatpfin 628 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 8 es_ES
dc.description.issue 4 es_ES
dc.relation.senia 261213 es_ES
dc.identifier.eissn 1751-732X


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