We carried out an inventory of the roneraie through a directed survey. This method consisted in counting rôniers along a 20-25m wide transect; the length of which crosses the roneraie. The transects are chosen according to the characteristics (qualitative or quantitative) of the ronery studied. The transects were set up using a compass and a 50m ribbon. The rest of the operation consisted in counting the number of roners by age group.