La stabilité des effectifs des puffins cendrés Calonectris diomedea borealis de l' île Selvagem Grande (30° 09 N, 15° 52 W) de 1983 a 1986

Abstract

A count made at the end of June and beginning of July 1986 on Selvagem Grande has shown the presence of 7,119 incubating Cory's Shearwaters Calonectris diomedea. Thus the population seems to number about 26,000 breeders, no change occuring during the last