0
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Behavioral and hormonal responses to corticosterone in the male red-sided garter snake, Thamnophis sirtalis parietalis

      ,
      Physiology & Behavior
      Elsevier BV

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Stress and glucocorticoids are generally thought to suppress reproductive function at multiple levels. We tested the hypotheses that exogenous corticosterone would suppress sexual behavior in a dose-dependent manner, as well as drive a decrease in plasma testosterone levels in the male red-sided garter snake, Thamnophis sirtalis parietalis. We examined this by challenging individual males with intraperitoneal injections of exogenous corticosterone, and subsequently exposing them to sexually attractive females or taking a blood sample. Previous work has demonstrated a hormonal but no behavioral response to stress in this species. In this study, increasing concentrations of exogenous corticosterone rapidly suppressed mating behavior in a threshold manner. However, exogenous corticosterone had no effect on plasma levels of testosterone. Thus, these data suggest that the mechanism is in place for corticosterone to suppress mating behavior in this species and that these effects do not occur because of an indirect effect on plasma levels of testosterone but rather are the direct effect of the hormone itself. In addition, the negative relationship observed previously between plasma levels of corticosterone and testosterone in this species was probably not the direct result of corticosterone acting on the hypothalamic-pituitary-gonadal (HPG) axis. Rather, our results seem to indicate that the negative associations between the hypothalamic-pituitary-adrenal axis (HPA) and the HPG axis occur at other levels of these neuroendocrine pathways.

          Related collections

          Author and article information

          Journal
          Physiology & Behavior
          Physiology & Behavior
          Elsevier BV
          00319384
          April 2001
          April 2001
          : 72
          : 5
          : 669-674
          Article
          10.1016/S0031-9384(01)00413-9
          11336998
          89ef3320-0f18-4d37-bca6-c315bd00874f
          © 2001

          https://www.elsevier.com/tdm/userlicense/1.0/

          History

          Comments

          Comment on this article