Mike,
I'll save you from having to wait for the website that Bill Cody is talking about. (Bill, I'm at fault this time

, just haven't had a chance to get the program uploaded). I've developed a simple little program to figure out the standard weights (that is, what a healthy fish should weigh) at a given length. There's at least twenty some species on here so you should be able to find what you're looking for. One word of caution, these calculations do not hold for very small fish (for most species < 3 inches.) I will have that worked into the program soon! Anyway, for anyone that is interested, just send me a line and I'll get the program emailed to you ASAP. If you like the program, email it on to anyone else you think might be interested.
Jason Roehrig
Cody deleated Jason's email address for secruity reasons and I think it was outdated.