bruno - only 2 - 3 people are allowed on the island at a time - no more needed really - as the small boat that transport people has a limit.
Just being present and visible to the Pelicans stops them from landing at the breeding colony. They wont come sit if you are there - as they have to land to start feeding. The island is small - so one can walk around it easily in 20 minutes. 2 - 3 people move around the island constantly and there is a look out tower.
Most helpful is the fact that the Pelicans first goes to Jutten island - where they are "chased" When they leave there - in the direction of Malgas island - the volunteers from Jutter use a radio to alert us they are on their way. We can track them coming in from a distance. Jutten island (where the cormorants breed) is much larger and they have a challenge on their hands to keep walking around the island constantly.
Hilton and I have had the same experience with birds / animals in our area.
Mike - I am sorry to hear about your health problems, and I hope treatment goes well. I am fine. if I die - I die. I probably won't even know I am dead
My biggest concern is what happens to my gear!