Variations saisonnieres de la teneur plasmatique en testostérone et dihydrotestostérone chez le crapaud de Mauritanie (Bufo mauritanicus) |
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| Authors: | R. Siboulet |
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| Affiliation: | 1. Laboratoire de Biologie générale, Université Paul-Sabatier, 31077 Toulouse Cedex, France;2. Université de Toulouse-Le Mirail, 109 bis, rue Vauquelin, 31081 Toulouse Cedex, France |
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| Abstract: | The changes in the plasma levels of testosterone and dihydrotestosterone during the annual reproduction cycle of the toad, Bufo mauritanicus, were determined by radioimmunoassay. Large variations were found, with highest levels during clasping (amplexus) in both males and females, when plasma testosterone rises to 595 and 91.7 ng/ml, respectively. Such high concentrations have not been reported previously. |
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