Seasonal levels of LH, FSH, testosterone and prolactin in adult male pudu (Pudu puda) |
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| Authors: | George A Bubenik Eugenia Reyes Dieter Schams Alejandro Lobos Ludek Bartos |
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| Institution: | aDepartment of Zoology, University of Guelph, Guelph, Ontario, Canada, NIG 2W1;bDepartment of Molecular Biology, Faculty of Veterinary Medicine, University of Concepcion, Concepcion, Chile;cDepartment of Animal Production and Reproduction, Faculty of Veterinary Medicine, University of Concepcion, Concepcion, Chile;dDepartment of Physiology, Technical University of Munich, D 85350 Freising—Weihenstephan, Germany;eResearch Institute of Animal Production Department of Biology, Ethology Group, Praha 10-Uhrineves, Czech Republic |
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| Abstract: | Seasonal levels of LH, FSH, testosterone (T) and prolactin (PRL) were determined in plasma of six captive adult male pudu (Pudu puda) kept in Concepcion, Chile. Average PRL levels exhibited one peak (28 ng/ml) in December (summer); minimal levels (3 to 6 ng/ml) were detected between April and July. FSH concentrations remained at peak levels (54–63 ng/ml) from December until March; minimal values (25–33 ng/ml) were detected from April until October. T levels exhibited two, almost equal peaks; the first peak (2.8 ng/ml) was detected in March (rut) and the second one (2.7 ng/ml) in October (spring). Both T peaks were preceded by an earlier elevation of LH in February and July (both around 1.3 ng/ml). During the fall, only the alpha male exhibited a sharp peak of T (8.4 ng/ml), whereas in the spring five out of six bucks demonstrated an increase of T levels. Two peaks of LH and T and the 4 months of elevated FSH may be related to a long period of spermatogenesis observed in this species. |
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| Keywords: | LH FSH testosterone prolactin testosterone pudu male seasonality deer |
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