Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution

Autores
Negri, Maria Fernanda; Denuncio, Pablo Ezequiel; Panebianco, María Victoria; Cappozzo, Humberto Luis
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In Argentina, the franciscana dolphin is one of themost vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species´ incidental mortality on the Southern coast of Buenos Aires province throughinterviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers´ gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI95% = 0.023-0.036) and 0.022 per shrimper´s net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attaina maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species´ abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted.
Na Argentina, a toninha é um dos cetáceos mais vulneráveis devido às capturas por rede de pesca artesanal. O presente estudo teve como objetivo estimar as capturas acidentais no sul da província de Buenos Aires, através de entrevistas aos capitães de barcos de pesca artesanal, entre os anos 2006- 2009. As capturas foram reportadas para redes de emalhe e de camarão; com as mais altas frequências entre outubro e fevereiro, a 5 km da costa e 10-20 m de profundidade. A mortalidade acidental média anual estimada foi de 107 golfinhos (IC 95% = 87-129), 92 em redes de emalhe (IC 95% = 73-112) e 15 em redes de camarão (IC 95% = 8-25), com uma captura de 0,029 golfinhos/km de rede de emalhe (IC 95% = 0,023-0,036) e 0,024/rede de camarão (IC 95% = 0,012-0,035). As flutuações anuais responderam principalmente às diferenças nos dias de pesca. Considerando o último levantamento estimativo feito para o norte costeiro da província, estima-se uma mortalidade entre 360-539 golfinhos/ano em toda a província de Buenos Aires. Esses valores correspondem de 2,5-3,7% da abundância populacional da Argentina; o que traria como consequência um declínio populacional da espécie, tornando-se fundamental encontrar alternativas de pesca para a área.
Fil: Negri, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Denuncio, Pablo Ezequiel. 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: Panebianco, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Materia
Franciscana Dolphin
Pontoporia blainvillei
Incidental mortality
Artisanal fisheries
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:11336/270716

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network_name_str CONICET Digital (CONICET)
spelling Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distributionNegri, Maria FernandaDenuncio, Pablo EzequielPanebianco, María VictoriaCappozzo, Humberto LuisFranciscana DolphinPontoporia blainvilleiIncidental mortalityArtisanal fisherieshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1In Argentina, the franciscana dolphin is one of themost vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species´ incidental mortality on the Southern coast of Buenos Aires province throughinterviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers´ gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI95% = 0.023-0.036) and 0.022 per shrimper´s net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attaina maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species´ abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted.Na Argentina, a toninha é um dos cetáceos mais vulneráveis devido às capturas por rede de pesca artesanal. O presente estudo teve como objetivo estimar as capturas acidentais no sul da província de Buenos Aires, através de entrevistas aos capitães de barcos de pesca artesanal, entre os anos 2006- 2009. As capturas foram reportadas para redes de emalhe e de camarão; com as mais altas frequências entre outubro e fevereiro, a 5 km da costa e 10-20 m de profundidade. A mortalidade acidental média anual estimada foi de 107 golfinhos (IC 95% = 87-129), 92 em redes de emalhe (IC 95% = 73-112) e 15 em redes de camarão (IC 95% = 8-25), com uma captura de 0,029 golfinhos/km de rede de emalhe (IC 95% = 0,023-0,036) e 0,024/rede de camarão (IC 95% = 0,012-0,035). As flutuações anuais responderam principalmente às diferenças nos dias de pesca. Considerando o último levantamento estimativo feito para o norte costeiro da província, estima-se uma mortalidade entre 360-539 golfinhos/ano em toda a província de Buenos Aires. Esses valores correspondem de 2,5-3,7% da abundância populacional da Argentina; o que traria como consequência um declínio populacional da espécie, tornando-se fundamental encontrar alternativas de pesca para a área.Fil: Negri, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Denuncio, Pablo Ezequiel. 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: Panebianco, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaInstituto Oceanográfico2012-03info: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/11336/270716Negri, Maria Fernanda; Denuncio, Pablo Ezequiel; Panebianco, María Victoria; Cappozzo, Humberto Luis; Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution; Instituto Oceanográfico; Brazilian Journal of Oceanography; 6; 2; 3-2012; 151-1601679-87591982-436XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/bjoce/a/L4WGVF39GQLSgGJ9xVGhh9M/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:55:07Zoai:ri.conicet.gov.ar:11336/270716instacron: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 09:55:07.511CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
title Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
spellingShingle Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
Negri, Maria Fernanda
Franciscana Dolphin
Pontoporia blainvillei
Incidental mortality
Artisanal fisheries
title_short Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
title_full Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
title_fullStr Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
title_full_unstemmed Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
title_sort Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution
dc.creator.none.fl_str_mv Negri, Maria Fernanda
Denuncio, Pablo Ezequiel
Panebianco, María Victoria
Cappozzo, Humberto Luis
author Negri, Maria Fernanda
author_facet Negri, Maria Fernanda
Denuncio, Pablo Ezequiel
Panebianco, María Victoria
Cappozzo, Humberto Luis
author_role author
author2 Denuncio, Pablo Ezequiel
Panebianco, María Victoria
Cappozzo, Humberto Luis
author2_role author
author
author
dc.subject.none.fl_str_mv Franciscana Dolphin
Pontoporia blainvillei
Incidental mortality
Artisanal fisheries
topic Franciscana Dolphin
Pontoporia blainvillei
Incidental mortality
Artisanal 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 In Argentina, the franciscana dolphin is one of themost vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species´ incidental mortality on the Southern coast of Buenos Aires province throughinterviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers´ gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI95% = 0.023-0.036) and 0.022 per shrimper´s net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attaina maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species´ abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted.
Na Argentina, a toninha é um dos cetáceos mais vulneráveis devido às capturas por rede de pesca artesanal. O presente estudo teve como objetivo estimar as capturas acidentais no sul da província de Buenos Aires, através de entrevistas aos capitães de barcos de pesca artesanal, entre os anos 2006- 2009. As capturas foram reportadas para redes de emalhe e de camarão; com as mais altas frequências entre outubro e fevereiro, a 5 km da costa e 10-20 m de profundidade. A mortalidade acidental média anual estimada foi de 107 golfinhos (IC 95% = 87-129), 92 em redes de emalhe (IC 95% = 73-112) e 15 em redes de camarão (IC 95% = 8-25), com uma captura de 0,029 golfinhos/km de rede de emalhe (IC 95% = 0,023-0,036) e 0,024/rede de camarão (IC 95% = 0,012-0,035). As flutuações anuais responderam principalmente às diferenças nos dias de pesca. Considerando o último levantamento estimativo feito para o norte costeiro da província, estima-se uma mortalidade entre 360-539 golfinhos/ano em toda a província de Buenos Aires. Esses valores correspondem de 2,5-3,7% da abundância populacional da Argentina; o que traria como consequência um declínio populacional da espécie, tornando-se fundamental encontrar alternativas de pesca para a área.
Fil: Negri, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Denuncio, Pablo Ezequiel. 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: Panebianco, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
description In Argentina, the franciscana dolphin is one of themost vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species´ incidental mortality on the Southern coast of Buenos Aires province throughinterviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers´ gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI95% = 0.023-0.036) and 0.022 per shrimper´s net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attaina maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species´ abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
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/11336/270716
Negri, Maria Fernanda; Denuncio, Pablo Ezequiel; Panebianco, María Victoria; Cappozzo, Humberto Luis; Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution; Instituto Oceanográfico; Brazilian Journal of Oceanography; 6; 2; 3-2012; 151-160
1679-8759
1982-436X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/270716
identifier_str_mv Negri, Maria Fernanda; Denuncio, Pablo Ezequiel; Panebianco, María Victoria; Cappozzo, Humberto Luis; Bycatch of franciscana dolphins Pontoporia blainvillei and artisanal fisheries dynamics in the species southernmost distribution; Instituto Oceanográfico; Brazilian Journal of Oceanography; 6; 2; 3-2012; 151-160
1679-8759
1982-436X
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://www.scielo.br/j/bjoce/a/L4WGVF39GQLSgGJ9xVGhh9M/
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Instituto Oceanográfico
publisher.none.fl_str_mv Instituto Oceanográfico
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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