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    <title>UTas ePrints - Body temperature as an indicator of egg-laying in the echidna, Tachyglossus aculeatus</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="s.c.nicol@utas.edu.au" name="eprints.creators_id" />
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<meta content="2007-02-16" name="eprints.datestamp" />
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<meta content="Body temperature as an indicator of egg-laying in the echidna, Tachyglossus aculeatus" name="eprints.title" />
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<meta content="; echidna, body temperature; egg-laying; gestation; burrow" name="eprints.keywords" />
<meta content="We investigated the usefulness of body temperature (Tb) as a guide to egg-laying in a monotreme mammal, the echidna, Tachyglossus aculeatus, and attempted to quantify changes in Tb and relate them to specific reproductive events. Six female echidnas were implanted with temperature loggers and then radio-tracked in the wild for up to six years. In reproductive years there was a significant reduction in Tb variability 21.7 plus or minus 2.5 days after final arousal from hibernation, which coincided with the time at which the female entered the nursery burrow. Egg-laying occurred within two days of this Tb change which lasted an average of 43 plus or minus 4 days. " name="eprints.abstract" />
<meta content="2006-01-24" name="eprints.date" />
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<meta content="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, Royal  Zoological Society NSW, Mosman, pp. 93-100.
Brice, P.H., Grigg, G.C., Beard, L.A., Donovan, J.A., 2002. Patterns of activity and inactivity in echidnas (Tachyglossus aculeatus) free-ranging in a hot dry climate: correlates with ambient temperature, time of day and season. Australian Journal of Zoology 50, 461-475.
de Mouzon, J., Testart, J., Lefevre, B., Pouly, J., Frydman, R., 1984. Time relationships between basal body temperature and ovulation or plasma progestins. Fertility and Sterility 41, 254-259.
Geiser, F., Seymour, R.S., 1989. Torpor in a pregnant echidna, Tachyglossus aculeatus (Monotremata: Tachyglossidae). Australian Mammalogy 12, 81-82.
Griffiths, M., 1978. The biology of monotremes. Academic Press Inc., New York.
Griffiths, M., McIntosh, D.L., Coles, R.E.A., 1969. The mammary gland of the echidna, Tachyglossus aculeatus with observations on the incubation of the egg and on the newly hached young. Journal of Zoology, London 158, 371-386.
Nicol, S., Andersen, N.A., 2002. The timing of hibernation in Tasmanian echidnas: why do they do it when they do? Comparative Biochemistry and Physiology. Part B, Biochemistry &amp; Molecular Biology 131, 603-611.
Nicol, S.C., Andersen, N.A., 2000. Patterns of hibernation of echidnas in Tasmania. In: Heldmaier, G., Klingenspor, M. (Eds.), Life in the Cold: Eleventh International Hibernation Symposium, Springer, Berlin, pp. 21-29.
Nicol, S.C., Andersen, N.A., Jones, S.M., 2005. Seasonal variations in reproductive hormones of free-ranging echidnas (Tachyglossus aculeatus): interaction between reproduction and hibernation. General and Comparative Endocrinology 144, 204–210.
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.
Rismiller, P.D., McKelvey, M.W., 2000. Frequency of breeding and recruitment in the short-beaked echidna, Tachyglossus aculeatus. Journal of Mammalogy 81, 1-17.
Rismiller, P.D., McKelvey, M.W., 2003. Body mass, age and sexual maturity in short-beaked echidnas, Tachyglossus aculeatus. Comparative Biochemistry and Physiology - Part A: Molecular &amp; Integrative Physiology 136, 851-865.
Rose, R.W., Jones, S.M., 1996. The association between basal body temperature, plasma progesterone and the oestrous cycle in a marsupial, the Tasmanian bettong (Bettongia gaimardi). Journal of Reproduction and Fertility 106, 67-71.
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<meta content="We investigated the usefulness of body temperature (Tb) as a guide to egg-laying in a monotreme mammal, the echidna, Tachyglossus aculeatus, and attempted to quantify changes in Tb and relate them to specific reproductive events. Six female echidnas were implanted with temperature loggers and then radio-tracked in the wild for up to six years. In reproductive years there was a significant reduction in Tb variability 21.7 plus or minus 2.5 days after final arousal from hibernation, which coincided with the time at which the female entered the nursery burrow. Egg-laying occurred within two days of this Tb change which lasted an average of 43 plus or minus 4 days. " name="DC.description" />
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    <h1 class="ep_tm_pagetitle">Body temperature as an indicator of egg-laying in the echidna, Tachyglossus aculeatus</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> (2006) <xhtml:em>Body temperature as an indicator of egg-laying in the echidna, Tachyglossus aculeatus.</xhtml:em> Journal of Thermal Biology, 31 (6). pp. 483-490. ISSN 0306-4565</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/751/1/Nicol_et_al._2006_Body_temperature_as_an_indicator_of_egg-laying_in_the_echidna%2C_Tachyglossus_aculeatus_J_Therm_Biol.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/751/1/Nicol_et_al._2006_Body_temperature_as_an_indicator_of_egg-laying_in_the_echidna%2C_Tachyglossus_aculeatus_J_Therm_Biol.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />299Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="759" name="docid" accept-charset="utf-8" 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.jtherbio.2006.05.001">http://dx.doi.org/10.1016/j.jtherbio.2006.05.001</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">We investigated the usefulness of body temperature (Tb) as a guide to egg-laying in a monotreme mammal, the echidna, Tachyglossus aculeatus, and attempted to quantify changes in Tb and relate them to specific reproductive events. Six female echidnas were implanted with temperature loggers and then radio-tracked in the wild for up to six years. In reproductive years there was a significant reduction in Tb variability 21.7 plus or minus 2.5 days after final arousal from hibernation, which coincided with the time at which the female entered the nursery burrow. Egg-laying occurred within two days of this Tb change which lasted an average of 43 plus or minus 4 days. </p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><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">; echidna, body temperature; egg-laying; gestation; burrow</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 &gt; 270600 Physiology &gt; 270604 Comparative Physiology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/270706.html">270000 Biological Sciences &gt; 270700 Ecology and Evolution &gt; 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">751</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">12 Feb 2008 10:12</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=751;">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&amp;eprintid=751">item control page</a></p>
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