[quote=@Jensoman]
<Snipped quote by malmshodes>

I thought their devil fruits appear somewhere else in the world. They should regrow on those special Devil fruit trees somewhere in the Grand Line.

At least I believe that's how it works. They never really gave THAT much insight on it. Doffy only got Ace's devil fruit because he has 'connections' and Blackbeard managed to get Whitebeard's because he was able to steal it from his dieing body...somehow.

There may be some means to extract someone's devil fruit from a dieing Devil Fruit user's corpse, but I don't think that's been shown yet.
[/quote]

When Ceasar's salamander Smiley died  [url=http://onepiece.wikia.com/wiki/Smiley]the Devil Fruit reappeared by changing a nearby apple.[/url] Bottom of the page last paragraph before the list of major battles it had been in