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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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