I wonder if this is just to prevent people from hunting these animals just for profit. I have no idea, but the article notes that some animals can be bartered. I do know that Moose are more scarce and sensitive to things like hunting, so I wouldn't be surprised if this is more to do with wildlife preservation and less about "control".
If you think they are rare enough that they shouldn't be bartered then you shouldn't be able to get a license to kill and eat them. But it's just one of those "gotcha" laws. Would you have assumed that you couldn't trade the meat of an animal you had killed? Would you have assumed that a rainwater barrel could be illegal? There are things that are plainly wrong and then there is the law. Take SOPA for example. And as to why there is a law - sometimes the stated reason is the reason but quite often the stated reason is just a cover story.
