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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/136569
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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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1846083296895696896 |
score |
13.22299 |