BartSimpson BartSimpson:
A few years back we had a similar event in California where frogs were found that were deformed and the usual 'experts' trotted out their conclusions that global warming and pollution were
absolutely to blame.
And then an actual scientist did some actual research and found out that the culprit was a parasite that infected tadpoles and altered the process that changes them from a tadpole to a frog (the exact word escapes me at the moment).
State Fish & Game sprayed the areas affected for the parasite and the issue ended.
My guess here is that it may well be the same thing: a parasite.
But don't anyone let that stop them from jumping to conclusions about how this is a portent of the End Times. Oh, no. It's much more fun to sit back and watch the doomsayers issue their prophecies.
![Eating Popcorn [popcorn]](./images/smilies/popcorn.gif)
I agree, Bart. People, including scientists, are always too quick to blame pollution. Parasites are often the culrpit. Sometimes there's just natural background levels of contaminants that were here long before the industrial age that affect fish. You can't jump to conclusions.
This is an issue in the oil sands. The natural level of hydrocarbons, metals and host of other suspects are very high there. Why? Well, because they're the oil sands; they
naturally contain all these things in the geology of the area.
But, then I'd say that's the importance of science to find out what's going on. With no science, then it's all speculation.
I had a scientist buddy testing the toxic effects of selenium on fish. He had a control population (not exposed) and a test population (subject to selenium). He ran his tests, but both sets showed signs of deformities (dual spines, fins on their heads, etc). It turns out that the soil in the area is naturally high in selenium. He was feeding the fish worms that had done nothing but eat high-selenium soil. Still, if we hadn't run those tests, we might not have known that.