1:00 pm - 2:00 pm
A graduate seminar is a presentation of the student’s final research project for their degree.
This is a RENR PhD final exam seminar for Andrew Nagel. This seminar is open to the general public to attend.
Location: 150 South Academic Building (SAB), University of Alberta, Edmonton AB
Thesis Topic: Toxicity of thallium to the water flea (Daphnia magna) and rainbow trout (Oncorhynchus mykiss)
Abstract: Thallium (Tl) is a trace metal that can be found at elevated concentrations in waters associated with the mining and refinement of base metals. Although the effects of Tl on aquatic biota are poorly studied, the Canadian Council of Ministers of the Environment have established a guideline value of 0.8 µg L-1 in fresh water. However, this value is based primarily on effects of Tl to an aquatic plant, and little is known regarding how protective this guideline is to freshwater animals. Using regulatory model freshwater species, Daphnia magna and rainbow trout, I aimed to expand mechanistic understanding of waterborne Tl toxicity and determine whether the current guideline value is likely to be protective of aquatic animals. This was accomplished by assessing metal accumulation, mortality, growth, reproduction, behaviour, ionoregulatory activity and oxidative stress. Overall, my data indicates guidelines for Tl in freshwater environments are likely protective against Tl toxicity.