Seasonal variation of LH and testosterone in the smallest deer,the pudu (Pudu puda molina) and its relationship to the antler cycle |
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| Affiliation: | 1. Laboratoire d''Ethologie Expérimentale et Comparée E.A. 4443 (LEEC), Université Paris 13, Sorbonne Paris Cité, F-93430 Villetaneuse, France;2. Department of Animal Physiology, University of Bayreuth, D-93440 Bayreuth, Germany;3. Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Mexico;4. Université Paris-Est, Ecole Nationale Vétérinaire d''Alfort, UMR 7179, CNRS, MNHN, Maisons-Alfort, France;5. Instituto de Investigaciones Biomédica, Universidad Nacional Autónoma de México, Ciudad de México, Mexico |
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| Abstract: | - 1.1. In order to obtain a seasonal profile of LH, three adult male pudu (Pudu puda, Molina) were sampled monthly from the saphenous vein for a period of one year.
- 2.2. A significant circannual variation of plasma LH levels was detected with an average peak value (1.77 ng/ml) recorded in February and nadir concentrations (0.19 ng/ml) observed in November.
- 3.3. The peak level of testosterone (1.54 ng/ml) was detected in March, the time of the rut.
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