Monthly population size of three guano bird species off Peru, 1953 to 1982
1987
Tovar, H. | Guillen, V. | Nakama, M.E. (Instituto del Mar del Peru, Callao (Peru))
Monthly population size estimates of three species of fish eating, guano-producing birds (cormorant: Phalacrocorax bougainvillii, booby: Sula variegata and pelican: Pelecanus thagus) were obtained, based on planimetric analyses of over 10,000 maps of their distribution on guano islands and points along the coast of Peru, for the years 1953 to 1982. These data allow for a much more detailed description of the interactions between the bird populations and their environment than had hirtherto been the case and as preliminary discussion of such interaction is given, with emphasis on the combined effects of the anchoveta fishery off Peru and successive El nino events.
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