PMID: 12769980Jul 1, 1997Paper

Critical thermal limits, temperature tolerance and water balance of a sub-Antarctic caterpillar, Pringleophaga marioni (Lepidoptera: Tineidae)

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

Abstract

Thermal tolerance, supercooling point, water balance and osmoregulatory ability of Pringleophaga marioni Viette (Lepidoptera: Tineidae) are investigated in this study. Field-fresh larvae had a mean CT(Min) (cold stupor) of -0.6 degrees C and a mean CT(Max) (heat coma) of 38.7 degrees C. The mean supercooling point of field-fresh individuals was -5.0 degrees C. Caterpillars showed 100% survival of freezing to -6.5 degrees C, but at -12 degrees C mortality rose to 100%. Survival of a 30h exposure to -6.0 degrees C was 80%, but declined to 30% in the 6-12h interval at -7.5 degrees C. No caterpillars survived for longer than 12h at -9.0 degrees C. Survival of high temperatures (35 degrees C and above) was poor. Tolerance of water loss (46% of fresh mass) and rates of water loss (1% fresh massh(-1)) were similar to those found in other mesic insects. P. marioni larvae were incapable of metabolizing lipids to replenish lost water and showed no haemolymph osmoregulatory ability. It is suggested that the preponderance of freeze tolerance in high-latitude southern hemisphere species may be associated with their occurrence in moist habitats, and that the "freeze tolerance" category be re-examined in the light of the range of strategies a...Continue Reading

References

May 1, 1995·Trends in Ecology & Evolution·M E Power, L Scott Mills

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Citations

May 18, 2001·Journal of Insect Physiology·S L. Chown
Mar 30, 2002·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·S L ChownK J Gaston
Jun 8, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Steven L Chown, Peter Convey
Dec 1, 2015·Journal of Thermal Biology·Matthew J EverattScott A L Hayward
Jun 14, 2003·Biological Reviews of the Cambridge Philosophical Society·Brent J SinclairSteven L Chown
Sep 20, 2015·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Sean Tomlinson, Myles H M Menz
Nov 23, 2015·Journal of Thermal Biology·Brent J SinclairLaura V Ferguson
Jun 6, 2006·Journal of Insect Physiology·Jacques A DeereSteven L Chown
Apr 8, 2015·Journal of Insect Physiology·Litza E Coello AlvaradoBrent J Sinclair
Feb 14, 2012·Journal of Insect Physiology·Helmut KäferAnton Stabentheiner
Oct 17, 2016·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Helmut KovacAnton Stabentheiner
May 12, 2018·Biological Reviews of the Cambridge Philosophical Society·Jantina Toxopeus, Brent J Sinclair
May 20, 2000·Proceedings. Biological Sciences·A Addo-BediakoK J Gaston
Jun 14, 2020·The Journal of Experimental Biology·Kaylen Brzezinski, Heath A MacMillan
Oct 3, 2018·Environmental Entomology·Nana BanaheneLily M Thompson
Apr 5, 2020·Insects·Helmut KäferAnton Stabentheiner
Mar 10, 2005·The Journal of Experimental Biology·Brent J Sinclair, Steven L Chown
Oct 28, 2011·The Journal of Experimental Biology·John S TerblancheSteven L Chown
Mar 2, 2010·The Journal of Experimental Biology·J S Bale, S A L Hayward
Mar 11, 2004·The Journal of Experimental Biology·Brent J SinclairSteven L Chown
Jun 15, 2010·The Journal of Experimental Biology·Meagan M StevensSteven L Chown
Jan 21, 2006·The Journal of Experimental Biology·Richard E LeeDavid L Denlinger

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