We aren't doing any studies of that sort of thing ourselves, but I know there are programs now that are beginning to collect some actual statistics on deformities of fish, rather than just collecting anecdotes.
I should point out something you may know. There was already one significant spill from the oil sands plants to the Athabasca. It occurred under winter ice in 1982. It was enough to close the fishery, at least at the western end of the lake, for a couple of years. There has been a long history of at least some industrial effect. The fact that this spill occurred under winter ice meant it was impossible to clean up. It made its way down the 250-some kilometres of river and into the lake. I think it's fair to say that scenario could repeat itself.