I believe the answer is: we can determine that the population growth of the dear in that certain are is decreasing.
Let say that the initial population of the dear is x.
deers population after six deers born = x + 6
deers population after five deers emigrated = x + 6 - 5
deers population after three deers killed = x + 6 - 5 -3
deers population after one deer immigrated = x + 6 - 5 - 3 + 1
Final deer population = x - 1