Cold tolerance of first-instar nymphs of the Australian plague locust, Chortoicetes terminifera

Journal of Insect Physiology
James D Woodman

Abstract

The cold tolerance of first-instar nymphs of the Australian plague locust, Chortoicetes terminifera, was examined using measures of total body water content, supercooling point and mortality for a range of sub-zero temperature exposure regimes. The supercooling points for starved and fed nymphs were -13.1+/-0.9 and -12.6+/-1.6 degrees C, and freezing caused complete mortality. Above these temperatures, nymphs were cold tolerant to different degrees based on whether they were starved or given access to food and water for 24h prior to exposure. The rate of cooling also had a significant effect on mortality. Very rapid cooling to -7 degrees C caused 84 and 87% mortality for starved and fed nymphs respectively, but this significantly decreased for starved nymphs if temperature declined by more ecologically realistic rates of 0.5 and 0.1 degrees C min(-1). These results are indicative of a rapid cold hardening response and are discussed in terms of the likely effects of cold nights and frost on first-instar nymphal survival in the field.

References

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Jun 14, 2003·Biological Reviews of the Cambridge Philosophical Society·Brent J SinclairSteven L Chown
Jan 21, 2006·The Journal of Experimental Biology·Richard E LeeDavid L Denlinger
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Jul 9, 2008·Journal of Insect Physiology·Christopher M Palmer, Katharina Siebke

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Citations

Aug 4, 2015·Global Change Biology·Rachel M PatemanJane K Hill
Jan 10, 2012·Journal of Insect Physiology·James D Woodman
Mar 15, 2011·Journal of Insect Physiology·David A Wharton
Aug 13, 2013·Journal of Insect Physiology·Jonas Lembcke AndersenJohannes Overgaard
Dec 21, 2014·Journal of Insect Science·Bao-Ping PangXiao-Rong Zhou
Oct 10, 2018·Annual Review of Entomology·Christopher M JonesJason W Chapman

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