L' évolution des effectifs des puffins cendrés Calonectris diomedea borealis de Selvagem Grande (30° 09 N, 15° 52 W) de 1989 a 1992

Abstract

A count made at the end of June 1992 on Selvagerm Grande Island has shown the presence of 10,111 nests of Cory's Shearwater containing an egg, which seems to correspond to a total number of about 31,000 breeders and to an increase of the breeding populati