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<title>UTas ePrints - Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod</title>
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<meta content="Swadling, Kerrie M." name="eprints.creators_name" />
<meta content="McKinnon, David" name="eprints.creators_name" />
<meta content="De'ath, Glen" name="eprints.creators_name" />
<meta content="Gibson, John A.E." name="eprints.creators_name" />
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<meta content="Life cycle plasticity and differential growth and development in marine and lacustrine
populations of an Antarctic copepod" name="eprints.title" />
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<meta content="We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which
inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for
several thousand generations. Similarities in the life cycles of the two populations included long overwintering
phases (.5 months) by late-stage nauplii, rapid development through the copepodid stages, and a short adult life
span of 2–3 weeks. Adults appeared in late spring or early summer and spawned and died soon after. However, the
life cycle of the lacustrine population was much less tightly regulated than at the marine site; animals were rarely
found living within the lake ice, and synchrony in the developmental cycle was diminished. It is likely that a
combination of factors, including ice hardness, a lack of predation threat, and a consistent food supply has freed
the lacustrine population from the constraints imposed by living within the ice cover. Instantaneous growth rates
calculated for the marine site showed a variable growth rate (0.04–0.14 d21). The lacustrine population in general
had faster growth rates than the marine population (0.10–0.26 d21) and reached maturity at a smaller size. This is
attributed, in part, to the higher environmental temperatures experienced by the lacustrine population." name="eprints.abstract" />
<meta content="2004-05" name="eprints.date" />
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<meta content="Limnology and Oceanography" name="eprints.publication" />
<meta content="49" name="eprints.volume" />
<meta content="3" name="eprints.number" />
<meta content="644-655" name="eprints.pagerange" />
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<meta content="Swadling, Kerrie M. and McKinnon, David and De'ath, Glen and Gibson, John A.E. (2004) Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod. Limnology and Oceanography, 49 (3). pp. 644-655. ISSN 0024-3590" name="eprints.citation" />
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<meta content="McKinnon, David" name="DC.creator" />
<meta content="De'ath, Glen" name="DC.creator" />
<meta content="Gibson, John A.E." name="DC.creator" />
<meta content="270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)" name="DC.subject" />
<meta content="We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which
inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for
several thousand generations. Similarities in the life cycles of the two populations included long overwintering
phases (.5 months) by late-stage nauplii, rapid development through the copepodid stages, and a short adult life
span of 2–3 weeks. Adults appeared in late spring or early summer and spawned and died soon after. However, the
life cycle of the lacustrine population was much less tightly regulated than at the marine site; animals were rarely
found living within the lake ice, and synchrony in the developmental cycle was diminished. It is likely that a
combination of factors, including ice hardness, a lack of predation threat, and a consistent food supply has freed
the lacustrine population from the constraints imposed by living within the ice cover. Instantaneous growth rates
calculated for the marine site showed a variable growth rate (0.04–0.14 d21). The lacustrine population in general
had faster growth rates than the marine population (0.10–0.26 d21) and reached maturity at a smaller size. This is
attributed, in part, to the higher environmental temperatures experienced by the lacustrine population." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Swadling, Kerrie M.</span> and <span class="person_name">McKinnon, David</span> and <span class="person_name">De'ath, Glen</span> and <span class="person_name">Gibson, John A.E.</span> (2004) <xhtml:em>Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod.</xhtml:em> Limnology and Oceanography, 49 (3). pp. 644-655. ISSN 0024-3590</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/2054/1/Swadling.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/2054/1/Swadling.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />462Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="2591" 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://www.aslo.org/lo/toc/vol_49/issue_3/index.html">http://www.aslo.org/lo/toc/vol_49/issue_3/index.html</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which
inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for
several thousand generations. Similarities in the life cycles of the two populations included long overwintering
phases (.5 months) by late-stage nauplii, rapid development through the copepodid stages, and a short adult life
span of 2–3 weeks. Adults appeared in late spring or early summer and spawned and died soon after. However, the
life cycle of the lacustrine population was much less tightly regulated than at the marine site; animals were rarely
found living within the lake ice, and synchrony in the developmental cycle was diminished. It is likely that a
combination of factors, including ice hardness, a lack of predation threat, and a consistent food supply has freed
the lacustrine population from the constraints imposed by living within the ice cover. Instantaneous growth rates
calculated for the marine site showed a variable growth rate (0.04–0.14 d21). The lacustrine population in general
had faster growth rates than the marine population (0.10–0.26 d21) and reached maturity at a smaller size. This is
attributed, in part, to the higher environmental temperatures experienced by the lacustrine population.</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">Additional Information:</th><td valign="top" class="ep_row">Copyright 2004, by the American Society of Limnology and Oceanography, Inc. Definitive version is available online at http://www.aslo.org/lo/toc/vol_49/issue_3/index.html</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/270702.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2054</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 Kerrie Swadling</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">11 Oct 2007 11:00</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=2054;">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=2054">item control page</a></p>
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