That sounds like it. Thanks OregonMouse

"Fish bones or entrails should never be disposed of in any body of water, since spores from the carcass will be released into the waterway. Salmon and trout should not be used as bait."

More can be found Here

Because birds could carry contaminated entrails to other lakes or rivers, the safest way to dispose of entrails may be to burn or bury them.

I have never heard of this problem in Ontario waters. I normally would dispose of fish guts back into the water.

As fishers, it becomes our responsibility to understand and adhere to the local rules and regulations - which I'm sure we all do.