L' évolution des effectifs de la population reproductrice de puffins cendrés Calonectris diomedea borealis de l' île Selvagem Grande (30° 09 N, 15° 52 W) de 1986 a 1989

Abstract

A count made at the end of June 1989 on Selvagem Grande Island has shown the presence of 8696 nests of Cory's Shearwaters containing an egg, which seems to correspond to a total number of about 27000 breeders and to a slight increase of the breeding popul