Year: 1983
Type: article
Abstract: Most feeding by seabirds in the Peruvian Coastal Current, an upwelling of high productivity off the west coast of South America, takes place in groups. The major prey is an anchovy (Engraulis ringens), which occurs in large shoals and is exploited mainly by three species: the Peruvian Booby (Sula variegata), Peruvian Brown Pelican (Pelecanus occidentalis thagus), and Guanay Cormorant (Phalacrocorax bougainvillii). Other foraging situations have different species' compositions, and these appear to be related to the size, depth, and duration of availability of prey. Dominance interactions between species may be important in structuring flocks that are scavenging or feeding on plankton swarms. Interspecific piracy seems unimportant in flocks foraging on fish shoals. Certain species usually arrive first at new feeding situations. These species may be used as guides by other species or merely may be faster and thus reach food sources first. Studies of foraging of seabirds should be a valuable addition to the study of the distribution of birds at sea.
Source: The Auk
Author: David Cameron Duffy
Language: English
Topic: Avian ecology and behavior
Subfield: Ecology
Field: Environmental Science
Domain: Physical Sciences
SDG: Life below water
Open Access status: green
Funder: Princeton University
OpenAlex ID: W2518528734