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<title>UTas ePrints - Seasonal variations in reproductive hormones of free-ranging echidnas (Tachyglossus aculeatus): interaction between reproduction and hibernation</title>
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<meta content="Nicol, Stewart C." name="eprints.creators_name" />
<meta content="Andersen, Niels A." name="eprints.creators_name" />
<meta content="Jones, Susan M." name="eprints.creators_name" />
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<meta content="Seasonal variations in reproductive hormones of free-ranging echidnas (Tachyglossus aculeatus): interaction between reproduction and hibernation" name="eprints.title" />
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<meta content="Monotreme, echidna, reproduction, testosterone, progesterone, hibernation" name="eprints.keywords" />
<meta content="We measured the reproductive steroids testosterone and progesterone in free-ranging adult echidnas over several years. For months other than June - August the mean progesterone concentration was 0.18 plus or minus 0.12 ng ml-1 (n=14), and all blood samples taken from active female echidnas in June - August had progesterone concentrations above 0.5 ng ml-1. The highest progesterone value measured was 13.4 ng ml-1 in a pregnant female several days before egg-laying. For months other than June - August the mean testosterone concentration was 0.09 plus or minus 0.05 ng ml-1 (n=13). During June - August all active sexually mature males had testosterone concentrations in excess of 0.2 ng ml-1 and were found in mating groups at some time during this period. The highest plasma testosterone concentration measured was 4.62 ng ml-1. " name="eprints.abstract" />
<meta content="2005-07-28" name="eprints.date" />
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<meta content="General and Comparative Endocrinology" name="eprints.publication" />
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<meta content="10.1016/j.ygcen.2005.05.013" name="eprints.id_number" />
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<meta content="Barnes, B.M., 1996. Relationships between hibernation and reproduction in male ground squirrels. In: Geiser, F., Hulbert, A.J., Nicol, S.C. (Eds.), Adaptations to the Cold: Tenth International Hibernation Symposium, vol. University of New England Press, Armidale.pp. 71-80
Beard, L.A., Grigg, G.C., 2000. Reproduction in the short-beaked echidna, Tachyglossus aculeatus: field observations at an elevated site in south-east Queensland. Proceedings of the Linnean Society of New South Wales 122, 89-99.
Beard, L.A., Grigg, G.C., Augee, M.L., 1992. Reproduction by echidnas in a cold climate. In: Augee, M.L. (Ed.) Platypus and Echidnas, vol. Royal Zoological Society NSW, Mosman.pp. 93-100
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Handasyde, K.A., McDonald, I.R., Evans, B.K., 1992. Seasonal changes in plasma concentration of progesterone in free-ranging platypus. In: Augee, M.L. (Ed.) Platypus and echidnas, vol. Royal Zoological Society of New South Wales, Sydney.pp. 75-79
Higgins, D.P., Tobias, G., Stone, G.M., 2004. Excretion profiles of some reproductive steroids in the faeces of captive female short-beaked echidna (Tachyglossus aculeatus) and the long-beaked echidna (Zaglossus sp.). Proceedings of the Linnean Society of New South Wales 125, 279-286.
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Nicol, S.C., Vedel-Smith, C., Andersen, N.A., 2004. Behavior, body temperature and hibernation in Tasmanian echidnas (Tachyglossus aculeatus). In: Barnes, B.M., Carey, H.V. (Eds.), Life in the Cold 2004, vol. 27. Biological Papers of the University of Alaska, Fairbanks, Alaska.pp. 149-157
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<meta content="We measured the reproductive steroids testosterone and progesterone in free-ranging adult echidnas over several years. For months other than June - August the mean progesterone concentration was 0.18 plus or minus 0.12 ng ml-1 (n=14), and all blood samples taken from active female echidnas in June - August had progesterone concentrations above 0.5 ng ml-1. The highest progesterone value measured was 13.4 ng ml-1 in a pregnant female several days before egg-laying. For months other than June - August the mean testosterone concentration was 0.09 plus or minus 0.05 ng ml-1 (n=13). During June - August all active sexually mature males had testosterone concentrations in excess of 0.2 ng ml-1 and were found in mating groups at some time during this period. The highest plasma testosterone concentration measured was 4.62 ng ml-1. " name="DC.description" />
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<h1 class="ep_tm_pagetitle">Seasonal variations in reproductive hormones of free-ranging echidnas (Tachyglossus aculeatus): interaction between reproduction and hibernation</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Nicol, Stewart C.</span> and <span class="person_name">Andersen, Niels A.</span> and <span class="person_name">Jones, Susan M.</span> (2005) <xhtml:em>Seasonal variations in reproductive hormones of free-ranging echidnas (Tachyglossus aculeatus): interaction between reproduction and hibernation.</xhtml:em> General and Comparative Endocrinology, 144 . pp. 204-210. ISSN 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/748/1/Nicol_et_al._2005_Seasonal_variations_in_reproductive_hormones_of_free-ranging_echidnas_etc_Gen_Comp_Endocrinol.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/748/1/Nicol_et_al._2005_Seasonal_variations_in_reproductive_hormones_of_free-ranging_echidnas_etc_Gen_Comp_Endocrinol.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />313Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="757" 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></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1016/j.ygcen.2005.05.013">http://dx.doi.org/10.1016/j.ygcen.2005.05.013</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">We measured the reproductive steroids testosterone and progesterone in free-ranging adult echidnas over several years. For months other than June - August the mean progesterone concentration was 0.18 plus or minus 0.12 ng ml-1 (n=14), and all blood samples taken from active female echidnas in June - August had progesterone concentrations above 0.5 ng ml-1. The highest progesterone value measured was 13.4 ng ml-1 in a pregnant female several days before egg-laying. For months other than June - August the mean testosterone concentration was 0.09 plus or minus 0.05 ng ml-1 (n=13). During June - August all active sexually mature males had testosterone concentrations in excess of 0.2 ng ml-1 and were found in mating groups at some time during this period. The highest plasma testosterone concentration measured was 4.62 ng ml-1. </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">Monotreme, echidna, reproduction, testosterone, progesterone, hibernation</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/270706.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270706 Life Histories (incl. Population Ecology)</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">748</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">Associate Professor Stewart C. Nicol</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">16 Feb 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">04 Feb 2008 13:18</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=748;">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=748">item control page</a></p>
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