Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull

Autores
Marinao, Cristian Javier; Kasinsky Aguilera, Lorna Tatiana; Suárez, Nicolás; Yorio, Pablo Martin
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We assessed Kelp Gull (Larus dominicanus) diet composition complementing conventional and stable isotope methods to determine the relevance of food derived from recreational fisheries. To achieve this goal, we quantified Kelp Gull diet composition breeding at the Bahía San Blas protected area, Argentina, between 2012 and 2014, assessing differences among four colonies, breeding stages and years. Diet analyses were based on pellets (n = 1054), chick stomach content samples (n = 351) and stable isotope analysis of adult and chick whole blood samples (n = 20 and 40, respectively). Kelp Gulls fed on at least 41 prey items, mainly fish complemented by marine invertebrates, Oat grain and insects. Stripped Weakfish (Cynoscion guatucupa), a demersal species, was in general the most frequent species among fish prey. Analyses of similarity indicated that diet composition based on pellet analysis was significantly different among the four colonies and, with a couple of exceptions, differed among breeding stages. Diet composition differed only between 2012 and 2013. Bayesian mixing model outputs confirmed demersal fish had in general the highest contribution to Kelp Gull diet. Stripped Weakfish is the most important target of recreational fisheries in the study area, and large quantities of waste resulting from the processing of this and other target fish is disposed mainly along the shore and in the Bahía San Blas refuse dump. The fact that it is a demersal species normally unavailable to surface feeding seabirds and the large size of Stripped Weakfish individuals found in diet samples (mean 41.5 ± 5.2 cm) strongly suggest that Kelp Gulls obtained this prey from the waste generated by the recreational fishery. Results show a strong association between the Kelp Gull and the recreational fishing activity that takes place in the Bahía San Blas protected area, likely resulting from the large amount of waste generated by the fishery.
Fil: Marinao, Cristian Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Kasinsky Aguilera, Lorna Tatiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Suárez, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Wildlife Conservation Society Argentina; Argentina
Materia
Bah ıa San Blas
Cynoscion guatucupa
Diet
Larus dominicanus
recreational fisheries
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:11336/88280
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/88280
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Contribution of recreational fisheries to the diet of the opportunistic Kelp GullMarinao, Cristian JavierKasinsky Aguilera, Lorna TatianaSuárez, NicolásYorio, Pablo MartinBah ıa San BlasCynoscion guatucupaDietLarus dominicanusrecreational fisherieshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We assessed Kelp Gull (Larus dominicanus) diet composition complementing conventional and stable isotope methods to determine the relevance of food derived from recreational fisheries. To achieve this goal, we quantified Kelp Gull diet composition breeding at the Bahía San Blas protected area, Argentina, between 2012 and 2014, assessing differences among four colonies, breeding stages and years. Diet analyses were based on pellets (n = 1054), chick stomach content samples (n = 351) and stable isotope analysis of adult and chick whole blood samples (n = 20 and 40, respectively). Kelp Gulls fed on at least 41 prey items, mainly fish complemented by marine invertebrates, Oat grain and insects. Stripped Weakfish (Cynoscion guatucupa), a demersal species, was in general the most frequent species among fish prey. Analyses of similarity indicated that diet composition based on pellet analysis was significantly different among the four colonies and, with a couple of exceptions, differed among breeding stages. Diet composition differed only between 2012 and 2013. Bayesian mixing model outputs confirmed demersal fish had in general the highest contribution to Kelp Gull diet. Stripped Weakfish is the most important target of recreational fisheries in the study area, and large quantities of waste resulting from the processing of this and other target fish is disposed mainly along the shore and in the Bahía San Blas refuse dump. The fact that it is a demersal species normally unavailable to surface feeding seabirds and the large size of Stripped Weakfish individuals found in diet samples (mean 41.5 ± 5.2 cm) strongly suggest that Kelp Gulls obtained this prey from the waste generated by the recreational fishery. Results show a strong association between the Kelp Gull and the recreational fishing activity that takes place in the Bahía San Blas protected area, likely resulting from the large amount of waste generated by the fishery.Fil: Marinao, Cristian Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Kasinsky Aguilera, Lorna Tatiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Suárez, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Wildlife Conservation Society Argentina; ArgentinaWiley Blackwell Publishing, Inc2018-12info: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/11336/88280Marinao, Cristian Javier; Kasinsky Aguilera, Lorna Tatiana; Suárez, Nicolás; Yorio, Pablo Martin; Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull; Wiley Blackwell Publishing, Inc; Austral Ecology; 43; 8; 12-2018; 861-8751442-9985CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12627info:eu-repo/semantics/altIdentifier/doi/10.1111/aec.12627info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:31Zoai:ri.conicet.gov.ar:11336/88280instacron: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 09:35:32.054CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
title Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
spellingShingle Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
Marinao, Cristian Javier
Bah ıa San Blas
Cynoscion guatucupa
Diet
Larus dominicanus
recreational fisheries
title_short Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
title_full Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
title_fullStr Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
title_full_unstemmed Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
title_sort Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull
dc.creator.none.fl_str_mv Marinao, Cristian Javier
Kasinsky Aguilera, Lorna Tatiana
Suárez, Nicolás
Yorio, Pablo Martin
author Marinao, Cristian Javier
author_facet Marinao, Cristian Javier
Kasinsky Aguilera, Lorna Tatiana
Suárez, Nicolás
Yorio, Pablo Martin
author_role author
author2 Kasinsky Aguilera, Lorna Tatiana
Suárez, Nicolás
Yorio, Pablo Martin
author2_role author
author
author
dc.subject.none.fl_str_mv Bah ıa San Blas
Cynoscion guatucupa
Diet
Larus dominicanus
recreational fisheries
topic Bah ıa San Blas
Cynoscion guatucupa
Diet
Larus dominicanus
recreational fisheries
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We assessed Kelp Gull (Larus dominicanus) diet composition complementing conventional and stable isotope methods to determine the relevance of food derived from recreational fisheries. To achieve this goal, we quantified Kelp Gull diet composition breeding at the Bahía San Blas protected area, Argentina, between 2012 and 2014, assessing differences among four colonies, breeding stages and years. Diet analyses were based on pellets (n = 1054), chick stomach content samples (n = 351) and stable isotope analysis of adult and chick whole blood samples (n = 20 and 40, respectively). Kelp Gulls fed on at least 41 prey items, mainly fish complemented by marine invertebrates, Oat grain and insects. Stripped Weakfish (Cynoscion guatucupa), a demersal species, was in general the most frequent species among fish prey. Analyses of similarity indicated that diet composition based on pellet analysis was significantly different among the four colonies and, with a couple of exceptions, differed among breeding stages. Diet composition differed only between 2012 and 2013. Bayesian mixing model outputs confirmed demersal fish had in general the highest contribution to Kelp Gull diet. Stripped Weakfish is the most important target of recreational fisheries in the study area, and large quantities of waste resulting from the processing of this and other target fish is disposed mainly along the shore and in the Bahía San Blas refuse dump. The fact that it is a demersal species normally unavailable to surface feeding seabirds and the large size of Stripped Weakfish individuals found in diet samples (mean 41.5 ± 5.2 cm) strongly suggest that Kelp Gulls obtained this prey from the waste generated by the recreational fishery. Results show a strong association between the Kelp Gull and the recreational fishing activity that takes place in the Bahía San Blas protected area, likely resulting from the large amount of waste generated by the fishery.
Fil: Marinao, Cristian Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Kasinsky Aguilera, Lorna Tatiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Suárez, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Wildlife Conservation Society Argentina; Argentina
description We assessed Kelp Gull (Larus dominicanus) diet composition complementing conventional and stable isotope methods to determine the relevance of food derived from recreational fisheries. To achieve this goal, we quantified Kelp Gull diet composition breeding at the Bahía San Blas protected area, Argentina, between 2012 and 2014, assessing differences among four colonies, breeding stages and years. Diet analyses were based on pellets (n = 1054), chick stomach content samples (n = 351) and stable isotope analysis of adult and chick whole blood samples (n = 20 and 40, respectively). Kelp Gulls fed on at least 41 prey items, mainly fish complemented by marine invertebrates, Oat grain and insects. Stripped Weakfish (Cynoscion guatucupa), a demersal species, was in general the most frequent species among fish prey. Analyses of similarity indicated that diet composition based on pellet analysis was significantly different among the four colonies and, with a couple of exceptions, differed among breeding stages. Diet composition differed only between 2012 and 2013. Bayesian mixing model outputs confirmed demersal fish had in general the highest contribution to Kelp Gull diet. Stripped Weakfish is the most important target of recreational fisheries in the study area, and large quantities of waste resulting from the processing of this and other target fish is disposed mainly along the shore and in the Bahía San Blas refuse dump. The fact that it is a demersal species normally unavailable to surface feeding seabirds and the large size of Stripped Weakfish individuals found in diet samples (mean 41.5 ± 5.2 cm) strongly suggest that Kelp Gulls obtained this prey from the waste generated by the recreational fishery. Results show a strong association between the Kelp Gull and the recreational fishing activity that takes place in the Bahía San Blas protected area, likely resulting from the large amount of waste generated by the fishery.
publishDate 2018
dc.date.none.fl_str_mv 2018-12
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/11336/88280
Marinao, Cristian Javier; Kasinsky Aguilera, Lorna Tatiana; Suárez, Nicolás; Yorio, Pablo Martin; Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull; Wiley Blackwell Publishing, Inc; Austral Ecology; 43; 8; 12-2018; 861-875
1442-9985
CONICET Digital
CONICET
url http://hdl.handle.net/11336/88280
identifier_str_mv Marinao, Cristian Javier; Kasinsky Aguilera, Lorna Tatiana; Suárez, Nicolás; Yorio, Pablo Martin; Contribution of recreational fisheries to the diet of the opportunistic Kelp Gull; Wiley Blackwell Publishing, Inc; Austral Ecology; 43; 8; 12-2018; 861-875
1442-9985
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://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12627
info:eu-repo/semantics/altIdentifier/doi/10.1111/aec.12627
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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