The aspect of his experimental process which is most important for obtaining reliable results is repeating his data collection many times.
The predator numbers for the deer will start to drop, due to a lack of food available. The vegetation that deer eat will increase, due to a lack of deer to eat it & so it will thrive untamed. This may cause certain animals to thrive & increase their respective predator counts & so on.
I think that the answer is 12 billion. So sorry if I am not right.
West Nile lead to a decline in susceptible avian and human hosts, with a subsequent decline in the number of cases since 1997
