It seems to me that if you're keeping a species from extinction, you're helping to conserve the species. If you contribute to a process through which there are X members of a species alive in 1970 and 1,000X members (or more) in 2010, you're helping to conserve the species.
In other words, hunting can save an endangered species. But not for long, it seems.
I learned more economics lessons from this 13-minute video than from half a semester of Econ 101.