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<title>UTas ePrints - Changes in Plasma Testosterone, Estrogen and Progesterone Concentrations Throughout the Annual Reproductive Cycle in Male Viviparous Blue-tongued Skinks, Tiliqua nigrolutea, (Scincidae), in Tasmania</title>
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<meta content="Edwards, Ashley" name="eprints.creators_name" />
<meta content="Jones, Susan M." name="eprints.creators_name" />
<meta content="Ashley.Edwards@utas.edu.au" name="eprints.creators_id" />
<meta content="S.M.Jones@utas.edu.au" name="eprints.creators_id" />
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<meta content="2007-01-24" name="eprints.datestamp" />
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<meta content="Changes in Plasma Testosterone, Estrogen and Progesterone Concentrations Throughout the Annual Reproductive Cycle in Male Viviparous Blue-tongued Skinks, Tiliqua nigrolutea, (Scincidae), in Tasmania" name="eprints.title" />
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<meta content="Few published studies have detailed comprehensively the correlations between plasma steroid hormone peaks and the timing of reproductive events in male squamate reptiles. We examined the patterns of plasma testosterone (T), estrogen (E) and progesterone (P4) concentrations in males of the viviparous blue-tongued skink, Tiliqua nigrolutea, throughout the annual cycle. Plasma T concentrations varied through the annual cycle, peaking at 10.9 * 3.00 ng ml-1 during spermiogenesis, coincident with agonistic male-male interactions, but falling prior to the mating period. Mean plasma T concentrations were basal (2 - 3 ng ml-1) during reproductive quiescence. Mean plasma E concentrations were significantly elevated (778.0 * 120.00 pg ml-1) during the mating period, but basal (<300 pg ml-1) both before and after mating. Mean plasma P4 concentrations peaked during the mating period (1.1 * 0.17 ng ml-1) and declined significantly after mating. We propose a potential role for E and P4 in the stimulation of male reproductive behavior during the mating period." name="eprints.abstract" />
<meta content="2001" name="eprints.date" />
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<meta content="Journal of Herpetology" name="eprints.publication" />
<meta content="35" name="eprints.volume" />
<meta content="2" name="eprints.number" />
<meta content="293-299" name="eprints.pagerange" />
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<meta content="0022-1511" name="eprints.issn" />
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<h1 class="ep_tm_pagetitle">Changes in Plasma Testosterone, Estrogen and Progesterone Concentrations Throughout the Annual Reproductive Cycle in Male Viviparous Blue-tongued Skinks, Tiliqua nigrolutea, (Scincidae), in Tasmania</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Edwards, Ashley</span> and <span class="person_name">Jones, Susan M.</span> (2001) <xhtml:em>Changes in Plasma Testosterone, Estrogen and Progesterone Concentrations Throughout the Annual Reproductive Cycle in Male Viviparous Blue-tongued Skinks, Tiliqua nigrolutea, (Scincidae), in Tasmania.</xhtml:em> Journal of Herpetology, 35 (2). pp. 293-299. ISSN 0022-1511</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_636' );" href="http://eprints.utas.edu.au/625/1/male_hormone_paper_from_Sue.pdf" onmouseout="EPJS_HidePreview( event, 'doc_preview_636' );"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a><div class="ep_preview" id="doc_preview_636"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/625/thumbnails/1/preview.png" class="ep_preview_image" border="0" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a href="http://eprints.utas.edu.au/625/1/male_hormone_paper_from_Sue.pdf"><span class="ep_document_citation">PDF (Author Version)</span></a> - Requires a PDF viewer<br />79Kb</td></tr></table><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Few published studies have detailed comprehensively the correlations between plasma steroid hormone peaks and the timing of reproductive events in male squamate reptiles. We examined the patterns of plasma testosterone (T), estrogen (E) and progesterone (P4) concentrations in males of the viviparous blue-tongued skink, Tiliqua nigrolutea, throughout the annual cycle. Plasma T concentrations varied through the annual cycle, peaking at 10.9 * 3.00 ng ml-1 during spermiogenesis, coincident with agonistic male-male interactions, but falling prior to the mating period. Mean plasma T concentrations were basal (2 - 3 ng ml-1) during reproductive quiescence. Mean plasma E concentrations were significantly elevated (778.0 * 120.00 pg ml-1) during the mating period, but basal (<300 pg ml-1) both before and after mating. Mean plasma P4 concentrations peaked during the mating period (1.1 * 0.17 ng ml-1) and declined significantly after mating. We propose a potential role for E and P4 in the stimulation of male reproductive behavior during the mating period.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">estrogen, progesterone, reproduction, skink, testosterone, testis, Tiliqua nigrolutea </td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270604.html">270000 Biological Sciences > 270600 Physiology > 270604 Comparative Physiology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/270603.html">270000 Biological Sciences > 270600 Physiology > 270603 Animal Physiology - Systems</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">625</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Ashley Edwards</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">24 Jan 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=625;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=625">item control page</a></p>
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