Abstract

AbstractMeasurements were made of 15 morphological parameters from 349 male Aponomma hydrosauri collected from 10 geographical regions throughout the distribution of this reptile tick species. A discriminant function analysis performed on the data, showed 3 groupings. Ticks from the geographically isolated populations in Western Australia were separated from the rest by a function with major contributions from measurements of body length. This supported previous studies which had indicated genetical divergence of the Western Australian populations. South eastern and south central regions were separated by a function with major contributions from measurements of body width. This may result from changes in the major host species or from climatic changes.

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