PMID: 12769944May 29, 2003Paper

Interactions between desiccation resistance, host-plant contact and the thermal biology of a leaf-dwelling sub-antarctic caterpillar, Embryonopsis halticella (Lepidoptera: Yponomeutidae)

Journal of Insect Physiology
Steven L Chown, C J. Klok

Abstract

During May 1997 thermal tolerance, supercooling point (SCP), low and high temperature survival, and desiccation resistance were examined in field-fresh Embryonopsis halticella Eaton larvae from Marion Island. SCPs were also examined in acclimated larvae, larvae starved for seven days, larvae within their leaf mines, and in larvae exposed to ice crystals. Field-fresh larvae had a critical minimum temperature (CT(Min)) and critical maximum temperature (CT(Max)) of 0 degrees C and 39.7 degrees C, respectively. Mean SCP of field-fresh caterpillars was -20.5 degrees C and this did not change with starvation. Field-fresh larvae did not survive freezing and their lower lethal temperatures (70% mortality below -21 degrees C) and survival of exposure to constant low temperatures (100% mortality after 12hrs at -19 degrees C) indicated that they are moderately chill tolerant. SCP frequency distributions were unimodal for field-fresh larvae, but became bimodal at higher acclimation temperatures. Contact with ice-crystals caused an increase in SCP (-6.5 degrees C), but contact with the host plant had less of an effect at higher subzero temperatures. It appears that the remarkable desiccation resistance of the larvae is selected for by the a...Continue Reading

Citations

Nov 2, 2004·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Brent J SinclairSteven L Chown
Aug 23, 2012·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Leanda D MasonBarbara Y Main
May 29, 2003·Journal of Insect Physiology·Abraham Addo-BediakoKevin J. Gaston
Nov 22, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·S L Chown
Mar 30, 2002·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·S L ChownK J Gaston
Jun 21, 2013·Integrative and Comparative Biology·C Jaco Klok, Jon F Harrison
Mar 28, 2009·Proceedings. Biological Sciences·Jennifer E LeeSteven L Chown
Jun 8, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Steven L Chown, Peter Convey
Jun 7, 2011·Journal of Insect Physiology·Steven L ChownJohn S Terblanche
Mar 18, 2016·Annual Review of Entomology·Steven L Chown, Peter Convey
Dec 2, 2011·Molecular Ecology·Céline BornBettine Jansen Van Vuuren
Sep 20, 2015·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Sean Tomlinson, Myles H M Menz
Jun 14, 2003·Biological Reviews of the Cambridge Philosophical Society·Brent J SinclairSteven L Chown
May 4, 2015·Journal of Insect Physiology·Sean Tomlinson, Ryan D Phillips
Jul 16, 2004·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Dennis R Nelson, Richard E Lee
May 20, 2000·Proceedings. Biological Sciences·A Addo-BediakoK J Gaston
Apr 8, 2021·The Journal of Experimental Biology·Simon BahrndorffTorsten N Kristensen
Jun 6, 2006·Journal of Insect Physiology·Jacques A DeereSteven L Chown
Aug 24, 2021·The Journal of Experimental Biology·Simon BahrndorffTorsten N Kristensen
Apr 23, 2011·Journal of Insect Physiology·Steaphan P Hazell, Jeffrey S Bale

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