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GLIER Graduate Student Seminar Series Seminar by Shifeng Yao

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  • Fri, 03/03/2017 - 3:00pm - 3:30pm

GLIER Graduate Student Shifeng Yao will present a seminar entitled "Comparison of Contaminant Accumulation in Asian Carp collected from China and North America".  See the abstract below.  Everyone is welcome.

Abstract:  Asian carp, including bighead carp and silver carp are a major threat to the Great Lakes as they have established large populations in the Mississippi and Illinois River and are suspected of having entered Lake Michigan. As planktivores, these species occupy a low trophic status and also exhibit very fast growth rates which reduce their tendency to bioaccumulate toxic contaminants. In China, these species of fish are highly sought after as food fish and stocked into many water bodies including the Three Gorges Reservoir. This study compares contaminant accumulation in silver carp and bighead carp collected from China and North America. PCBs, organochlorine pesticides, total mercury and methylmercury were examined in each specimen. Contaminant profiles were further compared using multivariate techniques. Organochlorine contamination was observed to be similar and low relative to fish consumption advisory thresholds in both populations. Mercury residues showed high contamination in North America fish, but still below concentrations warranting concern.




Alice Grgicak-Mannion
(519)253-3000 ext.2170