I mean, the foxes would have also died shortly after consuming the last 10 penguins. Not like those last ten would be the feast that keeps that population going for centuries.
The foxes are not native to Australia; they were introduced for fox hunting in the 1800s. That’s why the penguins are in such danger; they don’t have any evolved defense against the foxes.
Nature conservation is strange. Foxes eating penguins is normal? Meanwhile they use dogs which will eat whatever animal then dies instead of those penguins.
It doesnt make sense, the only reasonable protection is removing humans.
Foxes are not native to that (uninhabited) island, nor are they native to Australia, which is where they crossed over to the island from. Foxes were brought to Australia in the 1870s by humans so we could hunt them recreationally, and now they are an invasive species. We can’t undo that mistake now.