Fish Assassin, being that it is April first I'm not sure about your comments. If you actually killed a chinook you should know that they are closed, . A piece of fin for a DNA sample would be great. Every year about this time a few chinook are taken in the lower river. It would be nice to be able to identify which stock they are from. Are they early Chilliwack fish or strays from another system? They don't show up in the upper watershed in late Sept/Oct.
Further to what Pete says, chinooks are caught in the Vedder at this time of year and to identify what stocks they are DNA samples are needed. If you catch a chinook, without harming the fish ie leave it in the water, be gentle, etc, snip off a small piece of fin, say half the adipose, and keep it in a plastic bag, as cold as possible, take it to Fred's and they will put it in the proper fixative that I will supply tomorrow.
If you don't get to Fred's and still want to help out, put this same piece of fin, that has been kept cold, in alcohol (ethanol only, isopropyl and denatured alcohol is not so good for DNA samples), something like vodka or even better overproof white rum and again bring to Fred's. Don't be stingy with the booze
The fun part will be trying to persuade the DNA gurus at Nanaimo to run these samples ... but we'll worry about that later.