Glen A. Duffield

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Social groups in many animal species contain family members, and are maintained by parental care, and then tolerance of related individuals in the group. Lizards rarely show prolonged parental care, and rarely form stable social aggregations, although cohesive groups have been reported in the Australian skink genus, Egernia. A population of Egernia stokesii(More)
In this study we used data from six unlinked microsatellite loci to examine stable aggregations of Egernia stokesii, from a population in the southern Flinders Ranges of South Australia. We show that these aggregations are comprised of breeding partners, their offspring from two or more cohorts, and related adults, providing the first genetic evidence of a(More)
All active stages of the tickAmblyomma vikirri n. sp. (Acari: Ixodidae) are described from the gidgee skinkEgernia stokesii, a widely distributed lizard in South Australia, western New South Wales, western Queensland, Northern Territory and Western Australia. Thus far, the tick has been collected from this host only in the Flinders and Gawler Ranges of(More)
The newly described tick Amblyomma vikirri has a narrow host range, being found mainly on the Australian lizard, Egernia stokesii and rarely on another lizard, Tiliqua rugosa. Both hosts are in the family Scincidae. Larvae of A. vikirri were as successful in locating E. stokesii as T. rugosa from a range of release distances between 20 and 120 mm from the(More)
A membrane transporter with general affinity for purine and pyrimidine bases has been identified in Giardia intestinalis trophozoites by measuring cellular influx of [3H]adenine, [3H]guanine and [3H]thymine at 0 degrees C. The base transporter is distinct from the thymine/uracil-specific (type 1) and broad-specificity (type 2) nucleoside transporters of G.(More)
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