A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil
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...
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ftunivfurg:oai:repositorio.furg.br:1/930 2023-11-12T04:26:13+01:00 A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo 2001 application/pdf http://repositorio.furg.br/handle/1/930 eng eng 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. http://repositorio.furg.br/handle/1/930 open access Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture article 2001 ftunivfurg 2023-10-24T21:00:25Z 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. Article in Journal/Newspaper South Atlantic Ocean RI FURG (Repositório da Universidade Federal do Rio Grande) Uruguay |
institution |
Open Polar |
collection |
RI FURG (Repositório da Universidade Federal do Rio Grande) |
op_collection_id |
ftunivfurg |
language |
English |
topic |
Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture |
spellingShingle |
Franciscana Western South Atlantic Abundance Survey-aerial Conservation Incidental capture Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
topic_facet |
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. |
format |
Article in Journal/Newspaper |
author |
Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo |
author_facet |
Secchi, Eduardo Resende Ott, Paulo Henrique Crespo, Enrique Kinas, Paul Gerhard Pedraza, Susana Bordino, Pablo |
author_sort |
Secchi, Eduardo Resende |
title |
A first estimate of franciscana (Pontoporia blainvillei) abundance off southern Brazil |
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 |
first estimate of franciscana (pontoporia blainvillei) abundance off southern brazil |
publishDate |
2001 |
url |
http://repositorio.furg.br/handle/1/930 |
geographic |
Uruguay |
geographic_facet |
Uruguay |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
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. http://repositorio.furg.br/handle/1/930 |
op_rights |
open access |
_version_ |
1782340277123416064 |