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Lipid consumption in Ixodes ricinus (Acari: Ixodidae): temperature and potential longevity

Published online by Cambridge University Press:  10 July 2009

R.P. van Es
Affiliation:
Institute for Animal Health, Compton, Berkshire, RG20 7NN, UK
J.E. Hillerton*
Affiliation:
Institute for Animal Health, Compton, Berkshire, RG20 7NN, UK
G. Gettinby
Affiliation:
University of Strathclyde, Glasgow, G1 1XH, UK
*
p1 Author for correspondence. Fax: 44 1635 577299 E-mail: eric.hillerton@bbsrc.ac.uk

Abstract

The effect of temperature on the rate of consumption of the lipid reserves in Ixodes ricinus Linnaeus was characterized in constant temperature experiments. There was a consistent linear relationship between temperature and lipid consumption in nymphs and adult females and males between 5 and 37°C. Nymphs and adults were able to withstand extended periods of exposure to temperatures within the range of 2–37°C, although at 2°C there was evidence of thermal stress. The variance about the median rate of lipid consumption was found to increase with increasing rate of lipid consumption. Predictions of longevity were made using the rates of lipid consumption for the three stages studied, which ranged from 16 weeks to more than two years depending on temperature and stage. The predictions were consistent with reported survival times for I. ricinus and followed patterns reported for other ixodid ticks.

Type
Review Article
Copyright
Copyright © Cambridge University Press 1998

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