[Raapys]

All those Xi'Chung would be coming from the other empire with 'invisible' ships, I'm guessing. Isn't migration just the people *leaving* the planet? It doesn't say how many people actually immigrated from other planets, yours or your ally's.

So in SEV you can actually have a planet loose population simply because they're leaving to other planets in your empire( or other empires, if shared migration) at a higher rate than the current birthrate.