Effects of nutritional restriction on metabolic, endocrine, and ovarian function in llamas (Lama glama)

Simple item page
dc.contributor.authorNorambuena, M. C.
dc.contributor.authorSilva Jiménez, Mauricio
dc.contributor.authorUrra, F.
dc.contributor.authorUlloa Leal, C.
dc.contributor.authorFernandez, A.
dc.contributor.authorAdams, G. P.
dc.contributor.authorHuanca, W.
dc.contributor.authorRatto, Marcelo
dc.date2013
dc.date.accessioned2021-04-30T16:59:13Z
dc.date.available2021-04-30T16:59:13Z
dc.description.abstractThe objectives of the study were to determine the effects of nutritional restriction on ovarian function in llamas. Mature female llamas were assigned randomly to a Control group, fed 100% of maintenance energy requirements (MER) (n = 8), or a Restricted group (n = 8) fed from 70% to 40% of MER until a body condition score of 2.5 was attained. Blood samples were taken every-other-day to determine plasma concentrations of LH, estradiol, leptin and metabolic markers, and follicular dynamics were monitored daily by ultrasonography for 30 days (Experiment 1). Llamas were then treated with GnRH to compare the ovulatory response and corpus luteus (CL) development between groups (Experiment 2). Blood samples were taken to measure LH, leptin, progesterone and metabolic markers and ovarian structures were assessed as in Experiment 1. Llamas in the Restricted group had lower body mass and body condition scores than those in the Control group (P < 0.001). Plasma concentrations of cholesterol, non-esterified fatty acids, triglycerides, and urea were higher in the Restricted group (P < 0.05) than in the Control group. The day-to-day diameter profiles of the dominant follicles were smaller (P < 0.05) in the Restricted group than in the Control group but plasma estradiol concentration did not differ. The ovulation rate and LH secretion in response to GnRH did not differ. Day-to-day profiles of CL diameter, plasma progesterone and leptin concentrations were smaller (P < 0.01) in the Restricted group. In conclusion, nutritional restriction in llamas was associated with suppressed follicle and CL development, and lower plasma concentrations of progesterone and leptin. (C) 2013 Elsevier B.V. All rights reserved.
dc.identifier.citationANIMAL REPRODUCTION SCIENCE,Vol.138,252-260,2013
dc.identifier.doi10.1016/j.anireprosci.2013.01.019
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3738
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.sourceANIMAL REPRODUCTION SCIENCE
dc.subject.englishNutritional restriction
dc.subject.englishLH
dc.subject.englishCorpus luteum
dc.subject.englishLeptin
dc.subject.englishCamelids
dc.titleEffects of nutritional restriction on metabolic, endocrine, and ovarian function in llamas (Lama glama)
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
Files
Collections
Migración Web of Science