PMID: 12770496May 29, 2003Paper

Cold hardiness, supercooling ability and causes of low-temperature mortality in the soft tick, Argas reflexus, and the hard tick, Ixodes ricinus (Acari: Ixodoidea) from Central Europe

Journal of Insect Physiology
W Knülle, H Dautel

Abstract

Seasonal supercooling points (SCPs=temperature of crystallization) and cold hardiness were investigated in the indigenous hard tick, I. ricinus, and in A. reflexus, a soft tick introduced to Central Europe from the South. Both species proved to be freeze-susceptible as well as highly susceptible to inoculative freezing. None of the postembryonic developmental stages of either species showed any distinct seasonal pattern of SCP. Unexpectedly, the introduced A. reflexus exhibited a distinctly higher degree of cold hardiness in terms of lower lethal temperature (LT(50): 24h exposure) as well as lethal time (T(50): time of survival at -10.1 degrees C) than I. ricinus. Engorged I. ricinus larvae as well as engorged summer acclimatized A. reflexus larvae showed some mortality at temperatures well above the SCP. This mortality was generally expressed as a failure of the following stage to eclose properly. A 10-day cold acclimation at +3 degrees C eliminated that kind of mortality in summer acclimatized A. reflexus larvae, but not in I. ricinus larvae. It was frequently observed that freezing of ticks resulted-possibly via leakage from the midgut-in a subsequent reddish brown discoloration of the ticks after thawing. Taking into accoun...Continue Reading

References

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Citations

Jan 25, 2013·Experimental & Applied Acarology·Wesley TackKris Verheyen
Aug 6, 2013·International Journal for Parasitology·Miriam PfäffleTrevor N Petney
Mar 12, 2009·Interdisciplinary Perspectives on Infectious Diseases·J S GrayE Lindgren
Mar 20, 2001·Parasitology·D A Wharton
Feb 3, 2016·International Journal for Parasitology. Parasites and Wildlife·Filipe Dantas-Torres
Feb 1, 2000·Zentralblatt Für Bakteriologie : International Journal of Medical Microbiology·H DautelO Kahl
Jun 2, 2005·Insect Molecular Biology·M G TyshenkoV K Walker
Jan 26, 2008·Journal of Travel Medicine·Jochen SüssPeter C Werner
Mar 10, 2016·Medical and Veterinary Entomology·B BoxlerD Haag-Wackernagel
Jul 31, 2020·International Journal of Environmental Research and Public Health·Bob E H van OortSolveig Jore
Feb 12, 2021·Ticks and Tick-borne Diseases·Jeremy GrayAnnetta Zintl
Apr 2, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Alicia M FielerJoshua B Benoit

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