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Abstract:

We investigated nest-site selection of sympatrically breeding skuas (Catharacta spp.) and Kelp Gulls (Larus dominicanus) in the Antarctic Peninsula. We evaluated habitat preferences of nesting skuas and gulls in a patchy landscape by counting the numbers of nests in each of ten habitat types. Additionally, we evaluated the importance of 11 habitat variables (known to be influential to the reproductive success of marine birds) on nest-site selection by skuas and gulls. Both skuas and Kelp Gulls did not used habitat types in proportion to their availability. Skuas tended to nest in highlands with a north-northwest aspect, and in depressed areas with stable substrata. Kelp Gulls nested exclusively on coastal cliffs and pebble beaches, with no difference in tendency to use either habitat. Skua and gull nest sites were differentiated by elevation, percent of vegetation cover, slope, and microtopography. Grasses (for Kelp Gull), mosses (for skuas), and rockiness were the main variables predicting differential use of the available environment. Factors such as type of nest materials, proximity to foraging areas, social interactions, and presence of other species, among others, probably also affect nest-site selection for both skuas and gulls at Cierva Point, Antarctic Peninsula.

Registro:

Documento: Artículo
Título:Characteristics of nest sites of skuas and kelp gull in the Antarctic Peninsula
Autor:Quintana, R.D.; Travaini, A.
Filiación:GESER, Depto. de Ciencias Biológicas, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Univ. Nac. de la Patagonia Austral, U. Académica Caleta Olivia, Almirante Brown y Colón s/n, Puerto Deseado (9050), Santa Cruz, Argentina
Año:2000
Volumen:71
Número:2
Página de inicio:236
Página de fin:249
DOI: http://dx.doi.org/10.1648/0273-8570-71.2.236
Título revista:Journal of Field Ornithology
Título revista abreviado:J. Field Ornithol.
ISSN:02738570
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02738570_v71_n2_p236_Quintana

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Citas:

---------- APA ----------
Quintana, R.D. & Travaini, A. (2000) . Characteristics of nest sites of skuas and kelp gull in the Antarctic Peninsula. Journal of Field Ornithology, 71(2), 236-249.
http://dx.doi.org/10.1648/0273-8570-71.2.236
---------- CHICAGO ----------
Quintana, R.D., Travaini, A. "Characteristics of nest sites of skuas and kelp gull in the Antarctic Peninsula" . Journal of Field Ornithology 71, no. 2 (2000) : 236-249.
http://dx.doi.org/10.1648/0273-8570-71.2.236
---------- MLA ----------
Quintana, R.D., Travaini, A. "Characteristics of nest sites of skuas and kelp gull in the Antarctic Peninsula" . Journal of Field Ornithology, vol. 71, no. 2, 2000, pp. 236-249.
http://dx.doi.org/10.1648/0273-8570-71.2.236
---------- VANCOUVER ----------
Quintana, R.D., Travaini, A. Characteristics of nest sites of skuas and kelp gull in the Antarctic Peninsula. J. Field Ornithol. 2000;71(2):236-249.
http://dx.doi.org/10.1648/0273-8570-71.2.236