A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil
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Publication Date: | 2001 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da FURG (RI FURG) |
Download full: | http://repositorio.furg.br/handle/1/930 |
Summary: | The franciscana, Pontoporia blainvillei, is endemic to the western South Atlantic Ocean and is perhaps one of the most threatened small cetacean species in this region. This paper presents a first abundance estimate for the coastal waters of Rio Grande do Sul State (southern Brazil) and Uruguay. In March 1996, an aerial survey was conducted along the Rio Grande do Sul State coast. Thirty-four franciscanas (29 groups) were recorded leading to a mean density estimate of 0.657 individuals/km2 (95% CI: 0.516 to 0.836) for the study area (435km2) after applying a correction factor for submerged dolphins. This corresponds to an estimated abundance of 286 franciscanas (95% CI: 225 to 364). The study area represents only 0.7% of the suggested distribution of the stock. The paper discusses possible management implications of this study in the light of reported incidental mortality estimates for this region. Further surveys covering a larger area are recommended in order to obtain more reliable abundance estimates for the stock. |
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Secchi, Eduardo ResendeOtt, Paulo HenriqueCrespo, EnriqueKinas, Paul GerhardPedraza, SusanaBordino, Pablo2011-08-25T00:37:43Z2011-08-25T00:37:43Z2001SECCHI, Eduardo Resende et al. A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil. Journal Of Cetacean Research And Management, v. 3, n. 1, p. 95-100, 2001. Disponível em: <http://www.gemars.org.br/iota/site/publicacoes/publicacoes_pdf/56_publicacao.pdf>. Acesso em: 24 ago. 2011.http://repositorio.furg.br/handle/1/930The franciscana, Pontoporia blainvillei, is endemic to the western South Atlantic Ocean and is perhaps one of the most threatened small cetacean species in this region. This paper presents a first abundance estimate for the coastal waters of Rio Grande do Sul State (southern Brazil) and Uruguay. In March 1996, an aerial survey was conducted along the Rio Grande do Sul State coast. Thirty-four franciscanas (29 groups) were recorded leading to a mean density estimate of 0.657 individuals/km2 (95% CI: 0.516 to 0.836) for the study area (435km2) after applying a correction factor for submerged dolphins. This corresponds to an estimated abundance of 286 franciscanas (95% CI: 225 to 364). The study area represents only 0.7% of the suggested distribution of the stock. The paper discusses possible management implications of this study in the light of reported incidental mortality estimates for this region. Further surveys covering a larger area are recommended in order to obtain more reliable abundance estimates for the stock.engFranciscanaWestern South AtlanticAbundanceSurvey-aerialConservationIncidental captureA first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURGORIGINALA first estimate of franciscana (Pontoporia blainvillei) abundance.pdfA first estimate of franciscana (Pontoporia blainvillei) abundance.pdfapplication/pdf155173https://repositorio.furg.br/bitstream/1/930/1/A%20first%20estimate%20of%20franciscana%20%28Pontoporia%20blainvillei%29%20abundance.pdf43abc45abe768f13e7d47dbf9d61681aMD51open accessLICENSElicense.txtlicense.txttext/plain; charset=utf-81724https://repositorio.furg.br/bitstream/1/930/2/license.txt5b92b9704b4f13242d70e45ddef35a68MD52open access1/9302014-09-18 10:45:35.85open accessoai:repositorio.furg.br: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Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2014-09-18T13:45:35Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.pt_BR.fl_str_mv |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
title |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
spellingShingle |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil Secchi, Eduardo Resende Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture |
title_short |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
title_full |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
title_fullStr |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
title_full_unstemmed |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
title_sort |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
author |
Secchi, Eduardo Resende |
author_facet |
Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo |
author_role |
author |
author2 |
Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo |
dc.subject.por.fl_str_mv |
Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture |
topic |
Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture |
description |
The franciscana, Pontoporia blainvillei, is endemic to the western South Atlantic Ocean and is perhaps one of the most threatened small cetacean species in this region. This paper presents a first abundance estimate for the coastal waters of Rio Grande do Sul State (southern Brazil) and Uruguay. In March 1996, an aerial survey was conducted along the Rio Grande do Sul State coast. Thirty-four franciscanas (29 groups) were recorded leading to a mean density estimate of 0.657 individuals/km2 (95% CI: 0.516 to 0.836) for the study area (435km2) after applying a correction factor for submerged dolphins. This corresponds to an estimated abundance of 286 franciscanas (95% CI: 225 to 364). The study area represents only 0.7% of the suggested distribution of the stock. The paper discusses possible management implications of this study in the light of reported incidental mortality estimates for this region. Further surveys covering a larger area are recommended in order to obtain more reliable abundance estimates for the stock. |
publishDate |
2001 |
dc.date.issued.fl_str_mv |
2001 |
dc.date.accessioned.fl_str_mv |
2011-08-25T00:37:43Z |
dc.date.available.fl_str_mv |
2011-08-25T00:37:43Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SECCHI, Eduardo Resende et al. A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil. Journal Of Cetacean Research And Management, v. 3, n. 1, p. 95-100, 2001. Disponível em: <http://www.gemars.org.br/iota/site/publicacoes/publicacoes_pdf/56_publicacao.pdf>. Acesso em: 24 ago. 2011. |
dc.identifier.uri.fl_str_mv |
http://repositorio.furg.br/handle/1/930 |
identifier_str_mv |
SECCHI, Eduardo Resende et al. A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil. Journal Of Cetacean Research And Management, v. 3, n. 1, p. 95-100, 2001. Disponível em: <http://www.gemars.org.br/iota/site/publicacoes/publicacoes_pdf/56_publicacao.pdf>. Acesso em: 24 ago. 2011. |
url |
http://repositorio.furg.br/handle/1/930 |
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eng |
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eng |
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