Ovarian follicular dynamics and hormonal secretory profiles in guanacos (Lama guanicoe)

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dc.contributor.authorLuis Riveros, Jose
dc.contributor.authorSchuler, Gerhard
dc.contributor.authorBonacic, Cristian
dc.contributor.authorHoffmann, Bernd
dc.contributor.authorGraciela Chaves, M.
dc.contributor.authorUrquieta, Bessie
dc.date.accessioned2024-01-10T12:07:19Z
dc.date.available2024-01-10T12:07:19Z
dc.date.issued2010
dc.description.abstractThe objective of the present study was to describe ovarian activity in 11 adult non-mated guanacos, evaluated every second day for 40 days by transrectal ultrasonography and by plasma estradiol-17 beta and progesterone concentrations. An inverse relationship (r = -0.29, P < 0.001) was observed between the diameter of the largest ovarian follicle and the total number of follicles indicating that follicular growth in guanacos occurs in waves. The mean duration of follicular wave was 15.1 +/- 4.2 days with a range from 9 to 26. The follicular growth phase was 7.0 +/- 2.4 days, the static phase 3.0 +/- 1.2 days, the regression phase 5.2 +/- 2.1 days and the inter-wave interval was 12.6 +/- 5.6 days. The maximum follicular diameter in each follicular wave was 10.2 +/- 2.1 mm with a range from 7.2 to 16.1 mm. Inter-wave intervals of longer duration were associated with a larger maximum follicle diameter (P<0.001). Follicular activity alternated between ovaries in 93% of the waves with 48% of dominant follicles occurring in the left and 52% in the right ovary without differences (P>0.05). Plasma estradiol-17 beta concentrations showed a wave-like pattern, varying from 20.0 to 92.1 pmol/L. Plasma progesterone concentrations remained below 1 nmol/L without any ultrasonic evidence of ovulation during the study. These results in guanacos suggest a follicular wave pattern more similar to the llama (Lama glama) than previously described in other South American and Old World camelid species. (C) 2009 Published by Elsevier B.V.
dc.description.funderEU
dc.description.funderComision Nacional de Ciencia y Tecnologia (CONICYT)
dc.description.funderDeutscher Akademischer Austausch Dienst (DAAD)
dc.fechaingreso.objetodigital2024-03-19
dc.format.extent5 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.anireprosci.2009.11.005
dc.identifier.eissn1873-2232
dc.identifier.issn0378-4320
dc.identifier.pubmedidMEDLINE:20022436
dc.identifier.urihttps://doi.org/10.1016/j.anireprosci.2009.11.005
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76270
dc.identifier.wosidWOS:000275677600010
dc.information.autorucAgronomía e Ing. Forestal;Bonacic C;S/I;100304
dc.information.autorucAgronomía e Ing. Forestal;Riveros JL;S/I;128851
dc.issue.numero1-2
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final67
dc.pagina.inicio63
dc.publisherELSEVIER SCIENCE BV
dc.revistaANIMAL REPRODUCTION SCIENCE
dc.rightsacceso restringido
dc.subjectGuanaco
dc.subjectFollicular dynamics
dc.subjectEstradiol-17 beta
dc.subjectProgesterone
dc.subjectWAVE PATTERN
dc.subjectPROGESTERONE
dc.subjectALPACAS
dc.subjectLLAMAS
dc.subjectOVULATION
dc.subjectINDUCTION
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleOvarian follicular dynamics and hormonal secretory profiles in guanacos (Lama guanicoe)
dc.typeartículo
dc.volumen119
sipa.codpersvinculados100304
sipa.codpersvinculados128851
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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