Browsing Research Data (University of Pretoria) by UP Author "Pirk, Christian Walter Werner"

Browsing Research Data (University of Pretoria) by UP Author "Pirk, Christian Walter Werner"

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  • A new design for honeybee hoarding cages for laboratory experiments 
    Kohler, Angela; Nicolson, Sue W.; Pirk, Christian Walter Werner (Pretoria: University of Pretoria. Faculty of Natural and Agricultural Sciences. Department of Zoology & Entomology, 2012)
  • Nutrition affects stress resistance in African honeybees (Apis mellifera scutellata) 
    Archer, C. Ruth; Pirk, Christian Walter Werner; Nicolson, Sue W.; Wright, Geraldine A. (Pretoria: University of Pretoria. Faculty of Natural and Agricultural Sciences. Department of Zoology & Entomology, 2014)
    1. Nutrition plays an important role in physiological stress resistance and by adjusting their intake of key nutrients, such as protein and carbohydrate, many animals can better resist stress. 2. Poor nutrition may ...
  • Resistance of developing honeybee larvae during chronic exposure to dietary nicotine 
    Human, Hannelie; Archer, C. Ruth; Du Rand, Esther Elizabeth; Pirk, Christian Walter Werner; Nicolson, Sue W. (Pretoria : University of Pretoria. Faculty of Natural and Agricultural Sciences. Department of Zoology & Entomology, 2014)
    The effects of pesticides on honeybee larvae are less understood than for adult bees, even though larvae are chronically exposed to pesticide residues that accumulate in comb and food stores in the hive. We investigated ...
  • Simultaneous stressors : interactive effects of an immune challenge and dietary toxin can be detrimental to honeybees 
    Kohler, Angela; Pirk, Christian Walter Werner; Nicolson, Sue W. (Pretoria: University of Pretoria. Faculty of Natural and Agricultural Sciences. Department of Zoology & Entomology, 2012)
    Recent large-scale mortality of honeybee colonies is believed to be caused by multiple interactions between diseases, parasites, pesticide exposure, and other stress factors. To test whether a dual challenge has an additive ...