Abstract
Testosterone propionate (1 mg per 100 g body weight per day) was administered for 15 days, by injection
into the pectoral muscles, to male blossomheaded parakeets during both the spermatogenetically active
(February-March) and resting (August) phases of the annual cycle. It caused marked testicular atrophy
when it was injected in the sexually active birds. In sexually regressed parakeets it resulted in spermatokinesis
and differentiation of Leydig cells. It is evident that the same amount of exogenous testosterone
may exert, possibly through pituitary gonadotrophic agent(s), either pro- or anti-gonadal
influences depending upon the sexual status of the bird.
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Cited by
10 articles.
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