Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.

Autores
Beron, Maria Paula; García, Oscar Gregorio; Luppi, Tomas Atilio; Favero, Marco
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Foraging ecology is an essential component of the life history of a species and a good understanding of foraging ecology is especially important for threatened species where prey populations may be adversely affected by anthropogenic processes. This study examines age-related prey selection and prey-handling efficiency of Olrog's Gulls (Larus atlanticus) during the non-breeding season at the Mar Chiquita Coastal Lagoon, Argentina. Foraging behaviour and diet were determined by focal observation and compared with the availability of prey within their foraging patches. All captured prey were crabs, with the Burrowing Crab (Neohelice granulata) more commonly taken than the Mud Crab (Cyrtograpsus angulatus). Gulls consumed small and medium-sized crabs in higher proportions than those available and consumed more male crabs. Juvenile Gulls had longer handling times than older birds. Handling times increased with size of crabs independently of the sex of prey. The handling efficiency of adults was significantly higher than that of subadults, which in turn was higher than that of juveniles. These differences between age-classes could be attributed to differential foraging skills and social subordination of juvenile Gulls. The reasons for avoidance of large crabs is not certain but might be because carapaces are not easily digested, there is a higher risk of injury, or or capture of large crabs may result in more intense kleptoparasitic interactions, among others. © 2011 Royal Australasian Ornithologists Union.
Fil: Beron, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
Fil: García, Oscar Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
Fil: Luppi, Tomas Atilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
Materia
PREDATOR-PREY INTERACTIONS
OLROG'S GULL
CRABS
HANDLING EFFICIENCY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/99997
Acceder
id CONICETDig_87b3c48f1d2c9e61d4dd3476208b0cef
oai_identifier_str oai:ri.conicet.gov.ar:11336/99997
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.Beron, Maria PaulaGarcía, Oscar GregorioLuppi, Tomas AtilioFavero, MarcoPREDATOR-PREY INTERACTIONSOLROG'S GULLCRABSHANDLING EFFICIENCYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Foraging ecology is an essential component of the life history of a species and a good understanding of foraging ecology is especially important for threatened species where prey populations may be adversely affected by anthropogenic processes. This study examines age-related prey selection and prey-handling efficiency of Olrog's Gulls (Larus atlanticus) during the non-breeding season at the Mar Chiquita Coastal Lagoon, Argentina. Foraging behaviour and diet were determined by focal observation and compared with the availability of prey within their foraging patches. All captured prey were crabs, with the Burrowing Crab (Neohelice granulata) more commonly taken than the Mud Crab (Cyrtograpsus angulatus). Gulls consumed small and medium-sized crabs in higher proportions than those available and consumed more male crabs. Juvenile Gulls had longer handling times than older birds. Handling times increased with size of crabs independently of the sex of prey. The handling efficiency of adults was significantly higher than that of subadults, which in turn was higher than that of juveniles. These differences between age-classes could be attributed to differential foraging skills and social subordination of juvenile Gulls. The reasons for avoidance of large crabs is not certain but might be because carapaces are not easily digested, there is a higher risk of injury, or or capture of large crabs may result in more intense kleptoparasitic interactions, among others. © 2011 Royal Australasian Ornithologists Union.Fil: Beron, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: García, Oscar Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; ArgentinaFil: Luppi, Tomas Atilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; ArgentinaCsiro Publishing2011-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/99997Beron, Maria Paula; García, Oscar Gregorio; Luppi, Tomas Atilio; Favero, Marco; Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.; Csiro Publishing; Emu; 111; 1; 5-2011; 172-1780158-4197CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1071/MU10053info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU10053info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:45:47Zoai:ri.conicet.gov.ar:11336/99997instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:45:47.608CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
title Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
spellingShingle Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
Beron, Maria Paula
PREDATOR-PREY INTERACTIONS
OLROG'S GULL
CRABS
HANDLING EFFICIENCY
title_short Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
title_full Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
title_fullStr Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
title_full_unstemmed Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
title_sort Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.
dc.creator.none.fl_str_mv Beron, Maria Paula
García, Oscar Gregorio
Luppi, Tomas Atilio
Favero, Marco
author Beron, Maria Paula
author_facet Beron, Maria Paula
García, Oscar Gregorio
Luppi, Tomas Atilio
Favero, Marco
author_role author
author2 García, Oscar Gregorio
Luppi, Tomas Atilio
Favero, Marco
author2_role author
author
author
dc.subject.none.fl_str_mv PREDATOR-PREY INTERACTIONS
OLROG'S GULL
CRABS
HANDLING EFFICIENCY
topic PREDATOR-PREY INTERACTIONS
OLROG'S GULL
CRABS
HANDLING EFFICIENCY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Foraging ecology is an essential component of the life history of a species and a good understanding of foraging ecology is especially important for threatened species where prey populations may be adversely affected by anthropogenic processes. This study examines age-related prey selection and prey-handling efficiency of Olrog's Gulls (Larus atlanticus) during the non-breeding season at the Mar Chiquita Coastal Lagoon, Argentina. Foraging behaviour and diet were determined by focal observation and compared with the availability of prey within their foraging patches. All captured prey were crabs, with the Burrowing Crab (Neohelice granulata) more commonly taken than the Mud Crab (Cyrtograpsus angulatus). Gulls consumed small and medium-sized crabs in higher proportions than those available and consumed more male crabs. Juvenile Gulls had longer handling times than older birds. Handling times increased with size of crabs independently of the sex of prey. The handling efficiency of adults was significantly higher than that of subadults, which in turn was higher than that of juveniles. These differences between age-classes could be attributed to differential foraging skills and social subordination of juvenile Gulls. The reasons for avoidance of large crabs is not certain but might be because carapaces are not easily digested, there is a higher risk of injury, or or capture of large crabs may result in more intense kleptoparasitic interactions, among others. © 2011 Royal Australasian Ornithologists Union.
Fil: Beron, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
Fil: García, Oscar Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
Fil: Luppi, Tomas Atilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata; Argentina
description Foraging ecology is an essential component of the life history of a species and a good understanding of foraging ecology is especially important for threatened species where prey populations may be adversely affected by anthropogenic processes. This study examines age-related prey selection and prey-handling efficiency of Olrog's Gulls (Larus atlanticus) during the non-breeding season at the Mar Chiquita Coastal Lagoon, Argentina. Foraging behaviour and diet were determined by focal observation and compared with the availability of prey within their foraging patches. All captured prey were crabs, with the Burrowing Crab (Neohelice granulata) more commonly taken than the Mud Crab (Cyrtograpsus angulatus). Gulls consumed small and medium-sized crabs in higher proportions than those available and consumed more male crabs. Juvenile Gulls had longer handling times than older birds. Handling times increased with size of crabs independently of the sex of prey. The handling efficiency of adults was significantly higher than that of subadults, which in turn was higher than that of juveniles. These differences between age-classes could be attributed to differential foraging skills and social subordination of juvenile Gulls. The reasons for avoidance of large crabs is not certain but might be because carapaces are not easily digested, there is a higher risk of injury, or or capture of large crabs may result in more intense kleptoparasitic interactions, among others. © 2011 Royal Australasian Ornithologists Union.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/99997
Beron, Maria Paula; García, Oscar Gregorio; Luppi, Tomas Atilio; Favero, Marco; Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.; Csiro Publishing; Emu; 111; 1; 5-2011; 172-178
0158-4197
CONICET Digital
CONICET
url http://hdl.handle.net/11336/99997
identifier_str_mv Beron, Maria Paula; García, Oscar Gregorio; Luppi, Tomas Atilio; Favero, Marco; Age-related prey selectivity and foraging efficiency in Olrog's Gulls Larus atlanticus feeding on crabs in their non-breeding grounds.; Csiro Publishing; Emu; 111; 1; 5-2011; 172-178
0158-4197
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1071/MU10053
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU10053
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Csiro Publishing
publisher.none.fl_str_mv Csiro Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846082968549851136
score 13.22299

Publicaciones similares