Browsing by Author "Urquieta, Bessie"
Now showing items 1-12 of 12
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Flores, Paloma; García Huidobro, Jorge; Muñoz, Camila; Bustos Obregón, Eduardo; Urquieta, Bessie (ELSEVIER SCIENCE BV, 2002-08-15)Increasing the knowledge of the semen characteristics in the alpaca will contribute to understanding one of the many factors that affect the poor fertility rate in this species. Ten adult male alpacas, 2.6-10 years of age, ...
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Urquieta, Bessie; Flores, Paloma; Muñoz, Camila; Bustos Obregón, Eduardo; García Huidobro, Jorge (ELSEVIER SCIENCE BV, 2005-12)Most studies in alpaca reproductive biology have been focused on female physiology. Only recent research is being conducted in order to increase the knowledge on males. Semen characteristics during breeding periods will ...
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Paolicchi, Fernando; Urquieta, Bessie; Cabrera del Valle, Luis Alejandro; Bustos Obregón, Eduardo (ELSEVIER SCIENCE BV, 1999-01-08)South American camelids are induced ovulators and require a stimulus to trigger the LH surge responsible for the ovulation. Seminal plasma (SP) of fertile alpacas (Lama paces) was tested using a bioassay of pituitary cells ...
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Rodríguez, Angel; Rojas, Mariana A.; Bustos Obregón, Eduardo; Urquieta, Bessie; Regadera, Javier (WILEY-LISS, DIV JOHN WILEY & SONS INC, 1999-03-01)The purpose of the present study was to investigate the pattern of distribution of cytokeratins, vimentin and muscular actin in the testis of vicuna (Vicugna vicugna) and llama (Lama glama) two species of camelids native ...
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Parraguez Gamboa, Víctor; Atlagich, Miljenko; Araneda, Oscar; García, Carlos; Muñoz, Andrés; Reyes Solovera, Mónica de los; Urquieta, Bessie (CSIRO PUBLISHING, 2011)The present study evaluated the hypothesis that the effects of hypoxia on sheep pregnancies at high altitude (HA) are mediated by oxidative stress and that antioxidant vitamins may prevent these effects. Both HA native and ...
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Riveros, José Luis; Urquieta, Bessie; Bonacic, Cristian; Hoffman, Bernd; Bas M., Fernando; Schuler, Gerhard (ELSEVIER SCIENCE BV, 2009-12)Plasma concentrations of progesterone (P4), estradiol-17 (E2), estrone (E1) and estrone sulfate (E1S) were measured during gestation in eight guanacos kept in captivity. Gestational length was 346.1±9.8 days. P4 plasma ...
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Parraguez Gamboa, Víctor; Miljenko, Atlagich; Urquieta, Bessie; Galleguillos, Marco; Reyes Solovera, Mónica de los; Kooyman, David L.; Araneda, Silvia; Raggi Saini, Luis (CANADIAN VET MED ASSOC, 2010-07)Fetal weight and the placenta of sheep at high altitude (HA) are affected by hypoxia. Placental changes (an increase in placental size and vascularization) are greater in ewes from populations that have lived for several ...
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Urquieta, Bessie; Duran, María Carolina; Coloma, Ignacio; Parraguez Gamboa, Víctor (WILEY-BLACKWELL PUBLISHING, INC, 2009-12)Our aim was to compare Corpus luteum (CL) development and blood plasma concentration of progesterone ([P(4)]) in thoroughbred mares after spontaneous (Control: C) or human chorionic gonadotrophin (hCG)-induced ovulation. ...
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Buendía, P.; Soler, Carlés; Paolicchi, Fernando; Gago, G.; Urquieta, Bessie; Pérez Sánchez, F.; Bustos Obregón, Eduardo (ELSEVIER SCIENCE INC, 2002-03-01)Sperm morphology has been identified as one characteristic which can be useful in the prediction of sperm fertility, therefore, we hope that this study aimed at establishing standardized morphological criteria might serve ...
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Riveros, José Luis; Schuler, Gerhard; Bonacic, Cristian; Hoffmann, Bernd; Chaves, M. Graciela; Urquieta, Bessie (ELSEVIER, 2010)The 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 and progesterone ...
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Martínez, Ramón; Urquieta, Bessie; Altieri, Elena; Garzón, Laura; Cid, E. (BLACKWELL SCIENCE LTD, 1991-12)
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Adaro Aravena, Luis; Parraguez Gamboa, Víctor; Oróstegui, César; Urquieta, Bessie; Cepeda, Raquel (Universidad de Chile, 2002)En este estudio se describen las concentraciones plasmáticas mensuales en Chinchilla laniger (Grey) en cautiverio durante el período de un año con el objetivo de determinar posibles variaciones estacionales asociadas con ...