Sociogenetic investigation of the southern harvester termite, Microhodotermes viator, via genetic and behavioural bioassays
Doctoral Thesis
2014
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University of Cape Town
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Abstract
This thesis presents the first investigation of the population structure of the southern harvester termite, Microhodotermes viator (Family: Hodotermitidae), by assessing the genetic state and behavioural interactions within and between twelve colonies, from four areas across the Western Cape of South Africa. This study also critically debates the relationship between M. viator and heuweltjies (small Mima-like earth mounds), with regards to their origins and age. By critically analysing what is known, and debating the merits and shortcomings of various published hypotheses, this thesis concludes that heuweltjies are unequivocally attributable to the constructions and foraging activities of M. viator. However, the age and longevity of heuweltjies remains contentious. Several studies have attempted to ascertain age, using radiometric carbon dating on the basal calcrete layer found below mature heuweltjies, but there is disparity between results, primarily due to the challenges associated with dating calcrete. Therefore, an alternative method better equipped to mitigate these challenges, such as U-series isochron dating, is suggested for future research.
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Includes bibliographical references.
Reference:
Muna, N. 2014. Sociogenetic investigation of the southern harvester termite, Microhodotermes viator, via genetic and behavioural bioassays. University of Cape Town.