Pelagic seabird species, such as white-chinned petrels and black-browed albatrosses, actively forage in the highly productive Patagonian shelf waters (Cherel and Klages, 1998; Prince et al.
The main factor affecting seabird mortality was water depth, which is directly related to the location of the setting because water depth increases towards the shelf break, where white-chinned petrels forage actively throughout the year (Weimerskirch et al.
Similarly, the world population of white-chinned petrels is estimated at more than a millon breeding pairs (Croxall et al.
Status of white-chinned petrels Procellaria aequinoctialis Linnaeus 1758, at Bird island, South Georgia.
Foraging white-chinned petrels Procellaria aequinoctialis at risk: from the tropics to Antarctica.