Reproductive responses of rabbit does to a supplemental lighting program

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dc.contributor.authorMattaraia, V G M
dc.contributor.authorBianospino, E.
dc.contributor.authorFernandes, S.
dc.contributor.authorVasconcelos, José Luiz Moraes [UNESP]
dc.contributor.authorMoura, Ana Silvia Alves Meira Tavares [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T17:22:26Z
dc.date.accessioned2014-05-20T13:40:45Z
dc.date.available2014-02-26T17:22:26Z
dc.date.available2014-05-20T13:40:45Z
dc.date.issued2005-07-01
dc.description.abstractThe objective was to investigate whether the productivity of rabbit does can be improved, when natural photoperiod is decreasing, by adopting a supplemental lighting program. Three experiments were conducted involving two groups: control, submitted to the natural decreasing photoperiod, and supplemented with a lighting program which provided 14 h light/24 h beginning at 10 weeks of age. In the first experiment, 20 nulliparous does, 10 from each group, were euthanized 8 h after being presented to a buck; the overall number of follicles, whose diameter exceeded I mm, was determined macroscopically. The right ovaries were collected, histologically analyzed, and electronically measured. In the second experiment, 30 nulliparous does, 15 from each group, were presented to a buck (day 1). Receptive does were euthanized on day 8 to evaluate embryonic survival (number of normal embryos/ovulation rate). In the third experiment, 48 nulliparous does, 24 from each group, were followed from the first presentation to the buck until the weaning of the first litter. The effect of treatment on reproductive and body weight traits of does, and litter performance traits, at birth and weaning, was evaluated. The average number of follicles whose diameter exceeded 1 mm was higher in the treatment group (12.05 +/- 1.07 vs. 8.63 +/- 1.00, P=0.03 7). Receptive does of the treatment group had heavier ovaries relative to those of the control group (790 +/- 59 vs. 470 +/- 64 mg, P=0.004), whereas no treatment difference regarding this trait was found for non-receptive ones. Treatment had a favorable effect on pregnancy rate of total exposed and of receptive does (80.0% vs. 33.3%, P=0.01, and 92.3% vs. 50.0%, P=0.02, respectively). The number of underdeveloped embryos was lower (0.067 +/- 0.380 vs. 2.500 +/- 0.455, P=0.004), embryonic survival up to day 8, and uterus weight was higher in the treatment group (0.839 +/- 0.075 vs. 0.534 +/- 0.087, P=0.033 and 13.83 +/- 0.72 vs. 10.99 +/- 0.84, P=0.037, respectively). Number of presentations tended to be lower (1.32 +/- 0.17 vs. 1.75 +/- 0.16, P=0.077) and adjusted litter size in the first reproductive cycle tended to be higher (7.09 +/- 0.89 vs. 5.22 +/- 0.68, P=0.091) in the treatment group relative to the control.en
dc.description.affiliationUniv Estadual Paulista Julio Mesquita Filho, Fac Med Vet & Zootecn, Dept Prod & Exploracao Anim, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio Mesquita Filho, Fac Med Vet & Zootecn, Dept Prod & Exploracao Anim, BR-18618000 Botucatu, SP, Brazil
dc.format.extent179-187
dc.identifierhttp://dx.doi.org/10.1016/j.livprodsci.2004.10.012
dc.identifier.citationLivestock Production Science. Amsterdam: Elsevier B.V., v. 94, n. 3, p. 179-187, 2005.
dc.identifier.doi10.1016/j.livprodsci.2004.10.012
dc.identifier.issn0301-6226
dc.identifier.lattes1069922096621313
dc.identifier.urihttp://hdl.handle.net/11449/14149
dc.identifier.wosWOS:000230368100004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofLivestock Production Science
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectembryonic survivalpt
dc.subjectlitter performancept
dc.subjectovarian folliclept
dc.subjectovulation ratept
dc.subjectphotoperiodpt
dc.subjectreproductionpt
dc.titleReproductive responses of rabbit does to a supplemental lighting programen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1069922096621313
unesp.author.orcid0000-0001-6324-3614[4]
unesp.author.orcid0000-0002-2105-7319[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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