Kleptoparasitism by Kelp Gull Larus dominicanus on Common Tern Sterna hirundo and South American Tern S. Hirundinacea attending coastal fisheries in Mar del Plata, Argentina

JUAN P. SECO PON; A. MORETINNI

MARINE ORNITHOLOGY

Pacific Seabird Group

Año: 2009 vol. 37 p. 291 - 292

1018-3337

<!-- /* Font Definitions */ @font-face {font-family:Verdana; panose-1:2 11 6 4 3 5 4 4 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:536871559 0 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin-top:12.0pt; margin-right:0cm; margin-bottom:0cm; margin-left:0cm; margin-bottom:.0001pt; line-height:200%; mso-pagination:none; tab-stops:36.0pt 72.0pt 108.0pt 144.0pt 180.0pt 216.0pt 252.0pt 288.0pt 324.0pt 360.0pt 396.0pt 432.0pt; font-size:11.0pt; mso-bidi-font-size:10.0pt; font-family:Verdana; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:EN-US; mso-fareast-language:EN-US;} span.bodyitalic {mso-style-name:"body italic"; font-style:italic; mso-bidi-font-style:normal;} p.body, li.body, div.body {mso-style-name:body; margin-top:12.0pt; margin-right:0cm; margin-bottom:0cm; margin-left:0cm; margin-bottom:.0001pt; line-height:200%; mso-pagination:none; tab-stops:36.0pt 72.0pt 108.0pt 144.0pt 180.0pt 216.0pt 252.0pt 288.0pt 324.0pt 360.0pt 396.0pt 432.0pt; font-size:11.0pt; mso-bidi-font-size:10.0pt; font-family:Verdana; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:EN-US; mso-fareast-language:EN-US;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Kleptoparasitism, the stealing of already-procured food by individuals of the same or other species, is a widespread behaviour among birds (Brockmann & Barnard 1979). Such behaviour often occurs among seabirds, and may be an important feeding technique of Laridae (gulls and terns), in which the habit has been recorded for more than 25% of the family (Furness 1987). Likewise, some species of gulls frequently engage in intra- and interspecific kleptoparasitism, and this behaviour can become an important feeding method during the breeding and non-breeding seasons for these birds. This note provides information about new records of kleptoparasitism by Kelp Gull Larus dominicanus on two species of tern.