dc.creator | Urquieta, B. | |
dc.creator | Cepeda, R. | |
dc.creator | Ceáceres, J. E. | |
dc.creator | Raggi Saini, Luis | |
dc.creator | Rojas, J. R. | |
dc.date.accessioned | 2018-12-20T14:11:44Z | |
dc.date.available | 2018-12-20T14:11:44Z | |
dc.date.created | 2018-12-20T14:11:44Z | |
dc.date.issued | 1994 | |
dc.identifier | Journal of Arid Environments, Volumen 26, Issue 1, 2018, Pages 79-87 | |
dc.identifier | 1095922X | |
dc.identifier | 01401963 | |
dc.identifier | 10.1006/jare.1994.1012 | |
dc.identifier | http://repositorio.uchile.cl/handle/2250/154625 | |
dc.description.abstract | Experiments were undertaken to obtain information on the effects of season on endocrine function and testicular morphology in male vicunña. Serial blood samples were taken every 15 min over 4-8 h in February and August: testes size was measured and testicular biopsies obtained. Plasma testosterone was higher (p < 0·001) in February (6·60 ± 0·35 nmol l-1) than in August (4·45 ± 0·37 nmol l-1). Longitudinal and transverse testes diameters were greater at 3·3 ± 0·22 cm (p < 0·001) and 1·89 ± 0·24 cm (p < 0·003) in February than they were, at 2·64 ± 0·18 cm and 1·50 ± 0·25 cm, in August. Seminiferous tubules had greater diameters in February (163-49 ± 29·64 μm) than in August (137·90 ± 25·15 μm); Leydig cell nuclei diameters were also greater (5·88 ± 0·97 μm vs. 4·19 ± 1·03 μm), both sets of data differing significantly (p < 0·001). February is an active spermatogenic phase and August a regression phase. © 1994 Academic Press Limited. | |
dc.language | en | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | |
dc.source | Journal of Arid Environments | |
dc.subject | Ecology, Evolution, Behavior and Systematics | |
dc.subject | Ecology | |
dc.subject | Earth-Surface Processes | |
dc.title | Seasonal variation in some reproductive parameters of male vicunña in the high andes of northern chile | |
dc.type | Artículos de revistas | |