Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger

Autores
Mariano y Jelicich, Rocío; Madrid, Enrique; Favero, Marco
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Sexual segregation during foraging is common in birds and may occur at different temporal and spatial scales. In this study we explored the degree of sexual segregation in the Black Skimmer Rynchops niger by studying the species and sizes of prey consumed by either sex. Moreover we assessed the distribution of the sexes over the study area. We developed a multivariate tool for sex determination in Black Skimmers by using morphometric measurements from birds of known sex. Birds captured with mist nets and museum skins were analysed. The sex of birds was determined by PCR amplification of DNA or by gonad inspection. The fish prey remains obtained from spontaneous regurgitations of captured birds were used to estimate total length and weight of consumed fish prey. The bulk of the diet of both sexes was generally composed of the same species (mostly silversides Odontesthes spp.), but males consumed larger prey than females. The sex ratio in the lagoon was strongly skewed towards females. We discuss the implications of sexual segregation for habitat and species conservation measures.
Fil: Mariano y Jelicich, Rocío. 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: Madrid, Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; Argentina
Fil: Favero, Marco. 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
Materia
BLACK SKIMMER
INTRASPECIFIC DIET SEGREGATION
RYNCHOPS NIGER
SEXUAL SIZE DIMORPHISM
WINTERING GROUNDS
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:11336/114620
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Sexual dimorphism and diet segregation in the Black Skimmer Rynchops nigerMariano y Jelicich, RocíoMadrid, EnriqueFavero, MarcoBLACK SKIMMERINTRASPECIFIC DIET SEGREGATIONRYNCHOPS NIGERSEXUAL SIZE DIMORPHISMWINTERING GROUNDShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Sexual segregation during foraging is common in birds and may occur at different temporal and spatial scales. In this study we explored the degree of sexual segregation in the Black Skimmer Rynchops niger by studying the species and sizes of prey consumed by either sex. Moreover we assessed the distribution of the sexes over the study area. We developed a multivariate tool for sex determination in Black Skimmers by using morphometric measurements from birds of known sex. Birds captured with mist nets and museum skins were analysed. The sex of birds was determined by PCR amplification of DNA or by gonad inspection. The fish prey remains obtained from spontaneous regurgitations of captured birds were used to estimate total length and weight of consumed fish prey. The bulk of the diet of both sexes was generally composed of the same species (mostly silversides Odontesthes spp.), but males consumed larger prey than females. The sex ratio in the lagoon was strongly skewed towards females. We discuss the implications of sexual segregation for habitat and species conservation measures.Fil: Mariano y Jelicich, Rocío. 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: Madrid, Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; ArgentinaFil: Favero, Marco. 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; ArgentinaNederlandse Ornithologische Unie2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/114620Mariano y Jelicich, Rocío; Madrid, Enrique; Favero, Marco; Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger; Nederlandse Ornithologische Unie; Ardea; 95; 1; 12-2007; 115-1240373-2266CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/ardea/volume-95/issue-1/078.095.0113/Sexual-Dimorphism-and-Diet-Segregation-in-the-Black-Skimmer-Rynchops/10.5253/078.095.0113.fullinfo:eu-repo/semantics/altIdentifier/doi/10.5253/078.095.0113info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:43Zoai:ri.conicet.gov.ar:11336/114620instacron: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:34982025-09-29 10:17:43.345CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
title Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
spellingShingle Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
Mariano y Jelicich, Rocío
BLACK SKIMMER
INTRASPECIFIC DIET SEGREGATION
RYNCHOPS NIGER
SEXUAL SIZE DIMORPHISM
WINTERING GROUNDS
title_short Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
title_full Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
title_fullStr Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
title_full_unstemmed Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
title_sort Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
dc.creator.none.fl_str_mv Mariano y Jelicich, Rocío
Madrid, Enrique
Favero, Marco
author Mariano y Jelicich, Rocío
author_facet Mariano y Jelicich, Rocío
Madrid, Enrique
Favero, Marco
author_role author
author2 Madrid, Enrique
Favero, Marco
author2_role author
author
dc.subject.none.fl_str_mv BLACK SKIMMER
INTRASPECIFIC DIET SEGREGATION
RYNCHOPS NIGER
SEXUAL SIZE DIMORPHISM
WINTERING GROUNDS
topic BLACK SKIMMER
INTRASPECIFIC DIET SEGREGATION
RYNCHOPS NIGER
SEXUAL SIZE DIMORPHISM
WINTERING GROUNDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Sexual segregation during foraging is common in birds and may occur at different temporal and spatial scales. In this study we explored the degree of sexual segregation in the Black Skimmer Rynchops niger by studying the species and sizes of prey consumed by either sex. Moreover we assessed the distribution of the sexes over the study area. We developed a multivariate tool for sex determination in Black Skimmers by using morphometric measurements from birds of known sex. Birds captured with mist nets and museum skins were analysed. The sex of birds was determined by PCR amplification of DNA or by gonad inspection. The fish prey remains obtained from spontaneous regurgitations of captured birds were used to estimate total length and weight of consumed fish prey. The bulk of the diet of both sexes was generally composed of the same species (mostly silversides Odontesthes spp.), but males consumed larger prey than females. The sex ratio in the lagoon was strongly skewed towards females. We discuss the implications of sexual segregation for habitat and species conservation measures.
Fil: Mariano y Jelicich, Rocío. 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: Madrid, Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Biológicas. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Biológicas; Argentina
Fil: Favero, Marco. 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
description Sexual segregation during foraging is common in birds and may occur at different temporal and spatial scales. In this study we explored the degree of sexual segregation in the Black Skimmer Rynchops niger by studying the species and sizes of prey consumed by either sex. Moreover we assessed the distribution of the sexes over the study area. We developed a multivariate tool for sex determination in Black Skimmers by using morphometric measurements from birds of known sex. Birds captured with mist nets and museum skins were analysed. The sex of birds was determined by PCR amplification of DNA or by gonad inspection. The fish prey remains obtained from spontaneous regurgitations of captured birds were used to estimate total length and weight of consumed fish prey. The bulk of the diet of both sexes was generally composed of the same species (mostly silversides Odontesthes spp.), but males consumed larger prey than females. The sex ratio in the lagoon was strongly skewed towards females. We discuss the implications of sexual segregation for habitat and species conservation measures.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/114620
Mariano y Jelicich, Rocío; Madrid, Enrique; Favero, Marco; Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger; Nederlandse Ornithologische Unie; Ardea; 95; 1; 12-2007; 115-124
0373-2266
CONICET Digital
CONICET
url http://hdl.handle.net/11336/114620
identifier_str_mv Mariano y Jelicich, Rocío; Madrid, Enrique; Favero, Marco; Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger; Nederlandse Ornithologische Unie; Ardea; 95; 1; 12-2007; 115-124
0373-2266
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/ardea/volume-95/issue-1/078.095.0113/Sexual-Dimorphism-and-Diet-Segregation-in-the-Black-Skimmer-Rynchops/10.5253/078.095.0113.full
info:eu-repo/semantics/altIdentifier/doi/10.5253/078.095.0113
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
dc.publisher.none.fl_str_mv Nederlandse Ornithologische Unie
publisher.none.fl_str_mv Nederlandse Ornithologische Unie
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
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score 13.070432

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