Did either the rabbit or fox population show evidence of immigration or emigration? explain?

Yes

Explanation:

Foxes were allowed to invade in areas where population of rabbits was increasing. During invasion phase the population of the rabbits decreased tremendously. However, when the foxes were removed from the area, the rabbit's population increased by 2-3 times the remaining population. Here, foxes are reinvading the rabbit's habitat again and again and in this way they become emigrants as they leave their own habitat to live in an entirely new habitat for a short period of time