| [seasonal cycles of plasma testosterone and cortisol in the wild rabbit (oryctolagus cuniculus algirus loche) of zembra island, studied in its natural biotope and in captivity]. | annual variations in plasma testosterone and cortisol levels were determined in male wild rabbits caught monthly in their natural biotope (zembra island). for comparison, a group of warrens was hold in semi-captivity close to tunis. in both conditions plasma testosterone concentrations were low from january to september and peak values were observed in october. captive warrens exhibited a clear cut annual rhythm in plasma cortisol levels also and ether stress resulted in a very large increase of ... | 1984 | 6242034 |