Genetic diversity of southern Ontario fish: Research by new University of Guelph professor Dr. Elizabeth Mandeville

May 27, 2019 — Photos (clockwise from top left): Dr. Mandeville and other researchers in Dr. Catherine Wagner's lab at the University of Wyoming; North Fork Shoshone River in Shoshone National Forest; Dr. Mandeville and researcher paddling on the North Fork Shoshone River. All photos taken during Dr. Mandeville's PhD at the University of Wyoming.   The basic mechanism of hybridization, two species exchanging genes with...

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Sorting out sea lampreys in the Great Lakes

March 25, 2019 — by Harry Seely, BSc student Atlantic sea lamprey (Petromyzon marinus) are an invasive species in the Laurentian Great Lakes and since their introduction, have required significant management and control practices to reduce their impact on native fish communities.  Lamprey are parasitic organisms that attach to a host fish and feed on its body fluids. Sea lamprey are native to the...

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Taking biodiversity monitoring to the next level: Environmental DNA as a predictor of aquatic organism abundance

January 11, 2019 — Taking biodiversity monitoring to the next level: Environmental DNA as a predictor of aquatic organism abundance January 11, 2019 By Danielle Bourque, M.Sc. Student Left photo: For this experiment, it is important to prevent the target organism, Daphnia magna, from landing on the environmental DNA (eDNA) capture filter. Here, Limnotron water samples are vacuum filtered initially  through a 40 micron mesh to remove D. magna and their eggs from the...

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