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dc.contributor.author Suarez, Nicolas Marcelo
dc.contributor.author Retana, Maria Valeria
dc.contributor.author Yorio, Pablo Martin
dc.date.available 2017-10-23T21:38:32Z
dc.date.issued 2013-12
dc.identifier.citation Suarez, Nicolas Marcelo; Retana, Maria Valeria; Yorio, Pablo Martin; Effect of feeding technique and prey characteristics on the feeding rate of Olrog's Gulls (Larus atlanticus); Waterbird Society; Waterbirds (de Leon Springs, Fla.); 37; 1; 12-2013; 79-87
dc.identifier.issn 1524-4695
dc.identifier.uri http://hdl.handle.net/11336/26971
dc.description.abstract The Olrog's Gull (Larus atlanticus) is a species that feeds almost exclusively on intertidal crabs. The influence of feeding technique, food source, and habitat characteristics on the feeding rate of breeding individuals was examined at Bahía San Blas, Argentina, from September to December 2007. Olrog's Gulls used four feeding techniques, with more prey captured by pecking than by peck-digging, head submergence, or up-ending. Olrog's Gulls fed throughout the tidal cycle using different intertidal zones when they were exposed and covered by water. However, feeding techniques used in exposed intertidal areas (pecking and peck-digging) resulted in significantly higher feeding rates. Feeding rate increased with average prey density and was higher when feeding in structured environments, characterized by the presence of rocks or oysters and high densities of the intertidal crab Cyrtograpsus altimanus. The burrowing crab Neohelice granulata is the main component of the Olrog's Gull diet during most of the breeding cycle. Although average density of N. granulata in feeding patches was lower than that of C. altimanus, body size of the former was significantly larger and energy density of individuals higher, resulting in a higher energy profitability of unstructured habitats. Prey switching toward C. altimanus during the young chick stage observed in previous studies may result from the need to feed chicks with smaller prey.
dc.format application/pdf
dc.language.iso eng
dc.publisher Waterbird Society
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject ARGENTINA
dc.subject BAHÍA SAN BLAS PROTECTED AREA
dc.subject CRABS
dc.subject FEEDING BEHAVIOR
dc.subject INTERTIDAL CRABS
dc.subject LARUS ATLANTICUS
dc.subject OLROG'S GULL
dc.subject.classification Bioquímica y Biología Molecular
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Effect of feeding technique and prey characteristics on the feeding rate of Olrog's Gulls (Larus atlanticus)
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-07-27T12:33:10Z
dc.identifier.eissn 1938-5390
dc.journal.volume 37
dc.journal.number 1
dc.journal.pagination 79-87
dc.journal.pais Estados Unidos
dc.description.fil Fil: Suarez, Nicolas Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
dc.description.fil Fil: Retana, Maria Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil Fil: Yorio, Pablo Martin. Wildlife Conservation Society; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
dc.journal.title Waterbirds (de Leon Springs, Fla.)
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.1675/063.037.0110
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1675/063.037.0110


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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)