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<title>UTas ePrints - Changes in Plasma Progesterone, Estrogen, and Testosterone Concentrations throughout the Reproductive Cycle in Female 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="2007-01-18" name="eprints.datestamp" />
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<meta content="Changes in Plasma Progesterone, Estrogen, and Testosterone Concentrations throughout the Reproductive Cycle in Female Viviparous Blue-Tongued Skinks, Tiliqua nigrolutea (Scincidae), in Tasmania" name="eprints.title" />
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<meta content="estrogen; progesterone; multihormone control; reproduction; skink; steroid; testosterone; Tiliqua nigrolutea" name="eprints.keywords" />
<meta content="Changes in mean plasma concentrations of progesterone (P4), estrogen (E) and testosterone (T) in a captive population of female viviparous skinks, Tiliqua nigrolutea were examined. Reproductively active and quiescent individuals were present in the population concurrently, allowing a comparison between these two conditions. Mean plasma progesterone concentrations were basal (1-2 ng ml-1) until the start of gestation and peaked in the second trimester (12.7 +/- 1.27 ng ml-1), before falling significantly prior to parturition. An increase in mean plasma estrogen concentrations occurred coincident with the vitellogenic period; mean plasma estrogen concentration peaked at 715.1 +/- 106.68 pg ml-1 shortly before ovulation. Mean plasma testosterone concentrations in reproductively active females peaked in the periovulatory period (6.3 +/- 0.63 ng ml-1) and had returned to basal concentrations (< 1 ng ml-1) two weeks later. Changes in mean plasma steroid concentrations were correlated with reproductive condition, and are discussed in terms of potential in vivo steroid interactions and the multihormone control of reproduction." name="eprints.abstract" />
<meta content="2001-06" name="eprints.date" />
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<meta content="General and Comparative Endocrinology" name="eprints.publication" />
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<meta content="Arslan M., Zaidi P., Lobo J., Zaidi A. A., and Qazi M. H. (1978). Steroid levels in preovulatory and gravid lizards (Uromastix hardwicki). Gen. Comp. Endocrinol. 34, 300-303.
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<h1 class="ep_tm_pagetitle">Changes in Plasma Progesterone, Estrogen, and Testosterone Concentrations throughout the Reproductive Cycle in Female 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 Progesterone, Estrogen, and Testosterone Concentrations throughout the Reproductive Cycle in Female Viviparous Blue-Tongued Skinks, Tiliqua nigrolutea (Scincidae), in Tasmania.</xhtml:em> General and Comparative Endocrinology, 122 (3). pp. 260-269. ISSN 0016-6480</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 href="http://eprints.utas.edu.au/621/1/Edwards_and_JOnes_2001.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/621/1/Edwards_and_JOnes_2001.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />94Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="632" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_633' );" href="http://eprints.utas.edu.au/621/2/female_hormone_paper.pdf" onmouseout="EPJS_HidePreview( event, 'doc_preview_633' );"><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_633"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/621/thumbnails/2/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/621/2/female_hormone_paper.pdf"><span class="ep_document_citation">PDF (Author Version)</span></a> - Requires a PDF viewer<br />95Kb</td></tr></table><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Changes in mean plasma concentrations of progesterone (P4), estrogen (E) and testosterone (T) in a captive population of female viviparous skinks, Tiliqua nigrolutea were examined. Reproductively active and quiescent individuals were present in the population concurrently, allowing a comparison between these two conditions. Mean plasma progesterone concentrations were basal (1-2 ng ml-1) until the start of gestation and peaked in the second trimester (12.7 +/- 1.27 ng ml-1), before falling significantly prior to parturition. An increase in mean plasma estrogen concentrations occurred coincident with the vitellogenic period; mean plasma estrogen concentration peaked at 715.1 +/- 106.68 pg ml-1 shortly before ovulation. Mean plasma testosterone concentrations in reproductively active females peaked in the periovulatory period (6.3 +/- 0.63 ng ml-1) and had returned to basal concentrations (< 1 ng ml-1) two weeks later. Changes in mean plasma steroid concentrations were correlated with reproductive condition, and are discussed in terms of potential in vivo steroid interactions and the multihormone control of reproduction.</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; multihormone control; reproduction; skink; steroid; testosterone; 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">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">621</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">18 Jan 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">04 Feb 2008 13:42</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=621;">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=621">item control page</a></p>
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