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First published online May 18, 2006
Journal of Experimental Biology 209, 2138-2142 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02238
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Walking by Ixodes ricinus ticks: intrinsic and extrinsic factors determine the attraction of moisture or host odour

Emily Crooks and Sarah E. Randolph*

Department of Zoology, South Parks Road, Oxford OX1 3PS, UK


Figure 1
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  		Fig. 1. The percentage of high- and low-fat ticks that walked out of the introduction tube after 1 (white bars), 2 (light grey bars) and 24 h (dark grey bars). Each column shows the mean (±1 s.d.) over the four replicates under each of four experimental conditions: (A) the wet-dry gradient with no odour; (B) the wet-dry gradient with odour at the dry end; (C) uniform dry conditions with odour at one end; and (D) uniform wet conditions with odour at one end. The horizontal lines across each column show the proportion of ticks in the connecting tunnel (lower half) and the end boxes (upper half).

 

Figure 2
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  		Fig. 2. The percentage of high-fat (dark stipple) and low-fat (light stipple) ticks, of those that walked out of the introduction tube after 24 h, counted over all four replicates within one half of the arena (box plus connecting tunnel). (A) Ticks in the wet half of the arena (no odour). (B-D) Ticks in the odour half of the arena, where B has a wet-dry gradient with odour at the dry end, C has uniform dry conditions with odour at one end, and D has uniform wet conditions with odour at one end. {chi}2 values show comparisons between moisture conditions. The broken horizontal lines indicate an equal distribution of ticks between each half of the arenas.

 

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© The Company of Biologists Ltd 2006