Kleptoparasitism of Adult and Immature Brown Pelicans by Heermann's Gulls

Kleptoparasitism of Adult and Immature Brown Pelicans by Heermann's Gulls

We studied kleptoparasitism by Heerman's Gulls (L. heermanni ) on the piscivorous Brown Pelican (Pelecanus occidentalis ) in the Gulf of California, Mexico to answer two questions: (1) did adult or immature Heermann's Gulls differ in their frequency of kleptoparasitic attempts?, and (2) di...

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Veröffentlicht in:The Condor (Los Angeles, Calif.) Calif.), 1990-11, Vol.92 (4), p.1076-1077
Hauptverfasser: Tershy, Bernie R., Breese, Dawn, Meyer, Greg M.
Format: Artikel
Sprache:eng
Schlagworte:
Animal ethology
Aves
Biological and medical sciences
Foraging
Fundamental and applied biological sciences. Psychology
Immatures
Kleptoparasitism
Larus heermanni
Marine
Pelecanus occidentalis
Pelicans
Psychology. Psychoanalysis. Psychiatry
Sea birds
Short Communications
Vertebrata
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Beschreibung
Zusammenfassung:We studied kleptoparasitism by Heerman's Gulls (L. heermanni ) on the piscivorous Brown Pelican (Pelecanus occidentalis ) in the Gulf of California, Mexico to answer two questions: (1) did adult or immature Heermann's Gulls differ in their frequency of kleptoparasitic attempts?, and (2) did Heermann's Gulls attempt to kleptoparasitize immature or adult Brown Pelicans more often? The study area was a 20 x 45 km section of the Canal de Ballenas.
ISSN:0010-5422
1938-5129
DOI:10.2307/1368746