The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic

Autores
Procksch, Natália; Grandi, Maria Florencia; Ott, Paulo Henrique; Groch, Karina; Flores, Paulo A. C.; Zagonel, Marcelo; Crespo, Enrique Alberto; Machado, Rodrigo; Pavez, Guido; Guimarães, Murilo; Veronez, Maurício; de Oliveira, Larissa Rosa
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present estimates of the seasonal and spatial occupation by pinnipeds of the Wildlife Refuge of Ilha dos Lobos (WRIL), based on aerial photographic censuses. Twenty aerial photographic censuses were analysed between July 2010 and November 2018. To assess monthly differences in the numbers of pinnipeds in the WRIL we used a Generalized Linear Mixed Model. Spatial analysis was carried out using Kernel density analysis of the pinnipeds on a grid plotted along the WRIL. Subadult male South American sea lions (Otaria flavescens) were the most abundant pinniped in the WRIL. Potential females of this species were also recorded during half of the census. The maximum number of pinnipeds observed in the WRIL was 304 in September 2018, including an unexpected individual southern elephant seal (Mirounga leonina), and a high number of South American fur seal yearlings (Arctocephalus australis). However, there was no statistically significant difference in counts between months. In all months analysed, pinnipeds were most often found concentrated in the northern portion of the island, with the highest abundances reported in September. This study confirms the importance of the WRIL as a haulout site for pinnipeds in Brazil, recommends that land research and recreational activities occur in months when no pinnipeds are present, and encourages a regulated marine mammal-based tourism during winter and spring months.
Fil: Procksch, Natália. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Ott, Paulo Henrique. Universidade Estadual Do Rio Grande Do Sul; Brasil. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil
Fil: Groch, Karina. Instituto Australis de Pesquisa E Monitoramento Ambiental. Projeto Baleia Franca; Brasil
Fil: Flores, Paulo A. C.. Centro Mamíferos Aquáticos, Currently at Área de Proteção Ambiental; Brasil
Fil: Zagonel, Marcelo. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Machado, Rodrigo. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil
Fil: Pavez, Guido. Universidad de Valparaiso; Chile
Fil: Guimarães, Murilo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Veronez, Maurício. Universidad de Vale do Rio dos Sinos; Brasil
Fil: de Oliveira, Larissa Rosa. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil. Universidad de Vale do Rio dos Sinos; Brasil
Materia
SEA LIONS
OTARIA FLAVESCENS
SOUTH AMERICAN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/136569

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network_name_str CONICET Digital (CONICET)
spelling The northernmost haulout site of South American sea lions and fur seals in the western South AtlanticProcksch, NatáliaGrandi, Maria FlorenciaOtt, Paulo HenriqueGroch, KarinaFlores, Paulo A. C.Zagonel, MarceloCrespo, Enrique AlbertoMachado, RodrigoPavez, GuidoGuimarães, MuriloVeronez, Mauríciode Oliveira, Larissa RosaSEA LIONSOTARIA FLAVESCENSSOUTH AMERICANhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We present estimates of the seasonal and spatial occupation by pinnipeds of the Wildlife Refuge of Ilha dos Lobos (WRIL), based on aerial photographic censuses. Twenty aerial photographic censuses were analysed between July 2010 and November 2018. To assess monthly differences in the numbers of pinnipeds in the WRIL we used a Generalized Linear Mixed Model. Spatial analysis was carried out using Kernel density analysis of the pinnipeds on a grid plotted along the WRIL. Subadult male South American sea lions (Otaria flavescens) were the most abundant pinniped in the WRIL. Potential females of this species were also recorded during half of the census. The maximum number of pinnipeds observed in the WRIL was 304 in September 2018, including an unexpected individual southern elephant seal (Mirounga leonina), and a high number of South American fur seal yearlings (Arctocephalus australis). However, there was no statistically significant difference in counts between months. In all months analysed, pinnipeds were most often found concentrated in the northern portion of the island, with the highest abundances reported in September. This study confirms the importance of the WRIL as a haulout site for pinnipeds in Brazil, recommends that land research and recreational activities occur in months when no pinnipeds are present, and encourages a regulated marine mammal-based tourism during winter and spring months.Fil: Procksch, Natália. Universidad de Vale do Rio dos Sinos; BrasilFil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Ott, Paulo Henrique. Universidade Estadual Do Rio Grande Do Sul; Brasil. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); BrasilFil: Groch, Karina. Instituto Australis de Pesquisa E Monitoramento Ambiental. Projeto Baleia Franca; BrasilFil: Flores, Paulo A. C.. Centro Mamíferos Aquáticos, Currently at Área de Proteção Ambiental; BrasilFil: Zagonel, Marcelo. Universidad de Vale do Rio dos Sinos; BrasilFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; ArgentinaFil: Machado, Rodrigo. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); BrasilFil: Pavez, Guido. Universidad de Valparaiso; ChileFil: Guimarães, Murilo. Universidade Federal do Rio Grande do Sul; BrasilFil: Veronez, Maurício. Universidad de Vale do Rio dos Sinos; BrasilFil: de Oliveira, Larissa Rosa. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil. Universidad de Vale do Rio dos Sinos; BrasilSpringer Nature2020-12info: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/11336/136569Procksch, Natália; Grandi, Maria Florencia; Ott, Paulo Henrique; Groch, Karina; Flores, Paulo A. C.; et al.; The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic; Springer Nature; Scientific Reports; 10; 12-20202045-2322CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-020-76755-2info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-020-76755-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:14:55Zoai:ri.conicet.gov.ar:11336/136569instacron: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 15:14:55.926CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
title The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
spellingShingle The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
Procksch, Natália
SEA LIONS
OTARIA FLAVESCENS
SOUTH AMERICAN
title_short The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
title_full The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
title_fullStr The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
title_full_unstemmed The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
title_sort The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic
dc.creator.none.fl_str_mv Procksch, Natália
Grandi, Maria Florencia
Ott, Paulo Henrique
Groch, Karina
Flores, Paulo A. C.
Zagonel, Marcelo
Crespo, Enrique Alberto
Machado, Rodrigo
Pavez, Guido
Guimarães, Murilo
Veronez, Maurício
de Oliveira, Larissa Rosa
author Procksch, Natália
author_facet Procksch, Natália
Grandi, Maria Florencia
Ott, Paulo Henrique
Groch, Karina
Flores, Paulo A. C.
Zagonel, Marcelo
Crespo, Enrique Alberto
Machado, Rodrigo
Pavez, Guido
Guimarães, Murilo
Veronez, Maurício
de Oliveira, Larissa Rosa
author_role author
author2 Grandi, Maria Florencia
Ott, Paulo Henrique
Groch, Karina
Flores, Paulo A. C.
Zagonel, Marcelo
Crespo, Enrique Alberto
Machado, Rodrigo
Pavez, Guido
Guimarães, Murilo
Veronez, Maurício
de Oliveira, Larissa Rosa
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv SEA LIONS
OTARIA FLAVESCENS
SOUTH AMERICAN
topic SEA LIONS
OTARIA FLAVESCENS
SOUTH AMERICAN
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 present estimates of the seasonal and spatial occupation by pinnipeds of the Wildlife Refuge of Ilha dos Lobos (WRIL), based on aerial photographic censuses. Twenty aerial photographic censuses were analysed between July 2010 and November 2018. To assess monthly differences in the numbers of pinnipeds in the WRIL we used a Generalized Linear Mixed Model. Spatial analysis was carried out using Kernel density analysis of the pinnipeds on a grid plotted along the WRIL. Subadult male South American sea lions (Otaria flavescens) were the most abundant pinniped in the WRIL. Potential females of this species were also recorded during half of the census. The maximum number of pinnipeds observed in the WRIL was 304 in September 2018, including an unexpected individual southern elephant seal (Mirounga leonina), and a high number of South American fur seal yearlings (Arctocephalus australis). However, there was no statistically significant difference in counts between months. In all months analysed, pinnipeds were most often found concentrated in the northern portion of the island, with the highest abundances reported in September. This study confirms the importance of the WRIL as a haulout site for pinnipeds in Brazil, recommends that land research and recreational activities occur in months when no pinnipeds are present, and encourages a regulated marine mammal-based tourism during winter and spring months.
Fil: Procksch, Natália. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Ott, Paulo Henrique. Universidade Estadual Do Rio Grande Do Sul; Brasil. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil
Fil: Groch, Karina. Instituto Australis de Pesquisa E Monitoramento Ambiental. Projeto Baleia Franca; Brasil
Fil: Flores, Paulo A. C.. Centro Mamíferos Aquáticos, Currently at Área de Proteção Ambiental; Brasil
Fil: Zagonel, Marcelo. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Fil: Machado, Rodrigo. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil
Fil: Pavez, Guido. Universidad de Valparaiso; Chile
Fil: Guimarães, Murilo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Veronez, Maurício. Universidad de Vale do Rio dos Sinos; Brasil
Fil: de Oliveira, Larissa Rosa. Grupo de Estudos de Mamíferos Aquáticos Do Rio Grande Do Sul (GEMARS); Brasil. Universidad de Vale do Rio dos Sinos; Brasil
description We present estimates of the seasonal and spatial occupation by pinnipeds of the Wildlife Refuge of Ilha dos Lobos (WRIL), based on aerial photographic censuses. Twenty aerial photographic censuses were analysed between July 2010 and November 2018. To assess monthly differences in the numbers of pinnipeds in the WRIL we used a Generalized Linear Mixed Model. Spatial analysis was carried out using Kernel density analysis of the pinnipeds on a grid plotted along the WRIL. Subadult male South American sea lions (Otaria flavescens) were the most abundant pinniped in the WRIL. Potential females of this species were also recorded during half of the census. The maximum number of pinnipeds observed in the WRIL was 304 in September 2018, including an unexpected individual southern elephant seal (Mirounga leonina), and a high number of South American fur seal yearlings (Arctocephalus australis). However, there was no statistically significant difference in counts between months. In all months analysed, pinnipeds were most often found concentrated in the northern portion of the island, with the highest abundances reported in September. This study confirms the importance of the WRIL as a haulout site for pinnipeds in Brazil, recommends that land research and recreational activities occur in months when no pinnipeds are present, and encourages a regulated marine mammal-based tourism during winter and spring months.
publishDate 2020
dc.date.none.fl_str_mv 2020-12
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/11336/136569
Procksch, Natália; Grandi, Maria Florencia; Ott, Paulo Henrique; Groch, Karina; Flores, Paulo A. C.; et al.; The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic; Springer Nature; Scientific Reports; 10; 12-2020
2045-2322
CONICET Digital
CONICET
url http://hdl.handle.net/11336/136569
identifier_str_mv Procksch, Natália; Grandi, Maria Florencia; Ott, Paulo Henrique; Groch, Karina; Flores, Paulo A. C.; et al.; The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic; Springer Nature; Scientific Reports; 10; 12-2020
2045-2322
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-020-76755-2
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-020-76755-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
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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