History and complexity in tick-host dynamics: discrepancies between ‘real’ and ‘visible’ tick populations

Particle and Fibre Toxicology

Andrew D M Dobson¹ 

[1] School of Biological and Environmental Sciences, University of Stirling, Cottrell Building, Stirling FK9 4LA, UK

关键词: Demography;    Population modelling;    Tick-host dynamics;    Ticks;   

Others  :  806591
DOI  :  10.1186/1756-3305-7-231

 received in 2014-04-01, accepted in 2014-05-06,  发布年份 2014

【 摘 要 】

Background

Numerical responses of ticks to changes in densities of their hosts can be complex and apparently unpredictable. Manipulations even of deterministic models can produce counter-intuitive results, including tick populations that either rise or fall under increasing host densities, depending on initial conditions.

Methods

In this paper I use an established simulation model to demonstrate a wide range of numerical responses to different scenarios of host changes, and to examine the basic mechanisms that drive them.

Results

The rate and direction of change of host densities affects the extent to which questing tick numbers reflect those of their hosts. Numerical responses differ profoundly between dynamic tick-host systems and those allowed to reach equilibrium.

Conclusions

The key to understanding tick-host dynamics is to understand the difference between ‘real’ and ‘visible’ tick populations. An appreciation of the implications of this difference – and of the conditions that influence it - will benefit the effective interpretation of field data.

【 授权许可】

   
2014 Dobson; licensee BioMed Central Ltd.

【 图 表 】

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