First of all, you should read these general guides to predators:
Assuming that the island has large predators on it at all, I would imagine you might not need much.
Predators on ...
As this was already posted on the worldbuilding site, I wrote my answer aimed at a fictional story, not as survival advice. Still, I'll post it here and feel free to correct me if I am wrong.
Few animals randomly attack. They may hunt for food, but other than that most animals will leave humans alone so long as you leave them alone. As such, the food in ...