Effect of testosterone and cortisol administration on the reproductive tract of male Antechinus stuartii (Marsupialia)

Journal of Reproduction and Fertility
B M McAllan

Abstract

The life history of Antechinus stuartii, a marsupial, is highly synchronized and culminates in a brief mating period that is followed by complete male mortality. The accessory reproductive tracts of male A. stuartii enlarge in association with testosterone and cortisol hormone concentrations, but this appears to be unrelated to the spermatogenic cycle. The present study examined the effects of testosterone and cortisol on the male reproductive tract. Four groups of adult males from May (when plasma testosterone and cortisol concentrations are low) were given depot injections of testosterone esters or synthetic cortisol in doses that mimic concentrations found in males in the breeding period (August). Males were given either saline, testosterone only, cortisol only, or testosterone plus cortisol. Experimental groups did not differ in the seminiferous tubule morphology. However, the cells from the caudal end of the epididymides of both testosterone groups were considerably hypertrophied compared with males treated with saline or cortisol only. Testosterone treatment significantly increased prostate and bulbourethral gland mass, although addition of cortisol to the testosterone administration diminished this effect. The morphology...Continue Reading

Citations

Jan 23, 2008·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·R NaylorB M McAllan
Oct 6, 2010·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Ingeborg M M van LeeuwenOlaf Wolkenhauer

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