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Philip Cook and biological technician Frances VanderMeiden stripping eggs from a lake trout for a study of embryo toxicity caused by maternal transfer of dioxin. Photo courtesy of Philip Cook. Large image is 2688 x 1799 pixels.		With support from the University of Wisconsin Sea Grant Institute, Richard Peterson has determined that larval lake trout are highly sensitive to dioxin and similar compounds. Photo courtesy of Richard Peterson. Large image is 1597 x 1701 pixels.
Lake trout sac fry unexposed (top) and exposed (bottom) as fertilized eggs to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). External signs of toxicity in the fry exposed to TCDD include yolk sac edema (YSE) and pericardial edema (PE) associated with damage to vascular tissues (DV), hemmorhaging (H), craniofacial malformation (CFM), and hyperpigmentation (HYP), which lead to death prior to the swim-up stage of development. Photo courtesy of Philip Cook. Large image is 2064 x 2772 pixels.

 

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last updated 5 November 2003

http://www.seagrant.wisc.edu/communications/news_releases/2003/troutphotos.html