Seasonal relationships between plasma and fecal testosterone in response to GnRH in domestic ganders.

  title={Seasonal relationships between plasma and fecal testosterone in response to GnRH in domestic ganders.},
  author={Katharina Hirschenhauser and Erich Moestl and P{\'e}ter P{\'e}czely and Bernard Wallner and John Dittami and Kurt K. Kotrschal},
  journal={General and comparative endocrinology},
  volume={118 2},
In two groups (eight individuals each) of socially acquainted, outdoor-kept, domestic ganders (male Hungarian white: Anser domesticus), basal and GnRH-stimulated plasma testosterone (T) concentrations were compared with fecal testosterone metabolites (TM) in and between three seasons, spring peak of reproductive activity, summer photorefractoriness, and fall sexual reactivation. Plasma was sampled 90 min following the challenge and T was analyzed by radioimmunoassay following the GnRH challenge… CONTINUE READING
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