Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000
Bycatch of franciscanas in fishing operations along the western South Atlantic Ocean has been observed for approximately 60 years. Reports on bycatch in shark gillnet fisheries off Uruguay date back to the early 1940s. A decade later, gillnet fisheries for bottom-dwelling fish became the major conse...
Published in: | Latin American Journal of Aquatic Mammals |
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Language: | English |
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Sociedad Latinoamericana de Especialistas en Mamíferos Acuáticos (SOLAMAC)
2004
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Online Access: | https://lajamjournal.org/index.php/lajam/article/view/193 https://doi.org/10.5597/lajam00049 |
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ftjlajam:oai:ojs.lajamjournal.org:article/193 2024-09-15T18:36:27+00:00 Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 Secchi, E. R. Kinas, P. G. Muelbert, M. 2004-06-30 application/pdf https://lajamjournal.org/index.php/lajam/article/view/193 https://doi.org/10.5597/lajam00049 eng eng Sociedad Latinoamericana de Especialistas en Mamíferos Acuáticos (SOLAMAC) https://lajamjournal.org/index.php/lajam/article/view/193/145 https://lajamjournal.org/index.php/lajam/article/view/193 doi:10.5597/lajam00049 Latin American Journal of Aquatic Mammals; Vol. 3, No. 1 (2004); 61-68 2236-1057 1676-7497 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2004 ftjlajam https://doi.org/10.5597/lajam00049 2024-08-02T03:16:28Z Bycatch of franciscanas in fishing operations along the western South Atlantic Ocean has been observed for approximately 60 years. Reports on bycatch in shark gillnet fisheries off Uruguay date back to the early 1940s. A decade later, gillnet fisheries for bottom-dwelling fish became the major conservation concern for franciscanas in both Brazil and Argentina. A small portion (c. 10%), of the coastal gillnet fleet which operate from the port of Rio Grande (southern Rio Grande do Sul, Brazil) was monitored in 1999-2000. The total annual bycatch was estimated to be 946 franciscanas (non-parametric CI = 467 - 1525) for the year 1999 and 719 (non-parametric CI = CI: 248 - 1413) dolphins for 2000. The total bycatch for the whole FMA III was 1106 (CI: 578 - 1915) for 1999 and 992 (CI: 475 - 1832) for 2000. Since data were not normally distributed confidence intervals were estimated by non-parametric bootstrap. Despite strong evidence of decline for the stock from FMA III, no mitigation strategy has been established or designed. Instead, fishing effort is still very high, it is increasing and bycatch is uncontrolled. Thus, prompt management action is required. Regulation of gillnet fishing effort might be the only suitable immediate action to mitigate the bycatch. Article in Journal/Newspaper South Atlantic Ocean Latin American Journal of Aquatic Mammals (LAJAM) Latin American Journal of Aquatic Mammals 3 1 |
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Latin American Journal of Aquatic Mammals (LAJAM) |
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ftjlajam |
language |
English |
description |
Bycatch of franciscanas in fishing operations along the western South Atlantic Ocean has been observed for approximately 60 years. Reports on bycatch in shark gillnet fisheries off Uruguay date back to the early 1940s. A decade later, gillnet fisheries for bottom-dwelling fish became the major conservation concern for franciscanas in both Brazil and Argentina. A small portion (c. 10%), of the coastal gillnet fleet which operate from the port of Rio Grande (southern Rio Grande do Sul, Brazil) was monitored in 1999-2000. The total annual bycatch was estimated to be 946 franciscanas (non-parametric CI = 467 - 1525) for the year 1999 and 719 (non-parametric CI = CI: 248 - 1413) dolphins for 2000. The total bycatch for the whole FMA III was 1106 (CI: 578 - 1915) for 1999 and 992 (CI: 475 - 1832) for 2000. Since data were not normally distributed confidence intervals were estimated by non-parametric bootstrap. Despite strong evidence of decline for the stock from FMA III, no mitigation strategy has been established or designed. Instead, fishing effort is still very high, it is increasing and bycatch is uncontrolled. Thus, prompt management action is required. Regulation of gillnet fishing effort might be the only suitable immediate action to mitigate the bycatch. |
format |
Article in Journal/Newspaper |
author |
Secchi, E. R. Kinas, P. G. Muelbert, M. |
spellingShingle |
Secchi, E. R. Kinas, P. G. Muelbert, M. Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
author_facet |
Secchi, E. R. Kinas, P. G. Muelbert, M. |
author_sort |
Secchi, E. R. |
title |
Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
title_short |
Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
title_full |
Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
title_fullStr |
Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
title_full_unstemmed |
Incidental catches of franciscana in coastal gillnet fisheries in the Franciscana Management Area III: period 1999-2000 |
title_sort |
incidental catches of franciscana in coastal gillnet fisheries in the franciscana management area iii: period 1999-2000 |
publisher |
Sociedad Latinoamericana de Especialistas en Mamíferos Acuáticos (SOLAMAC) |
publishDate |
2004 |
url |
https://lajamjournal.org/index.php/lajam/article/view/193 https://doi.org/10.5597/lajam00049 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Latin American Journal of Aquatic Mammals; Vol. 3, No. 1 (2004); 61-68 2236-1057 1676-7497 |
op_relation |
https://lajamjournal.org/index.php/lajam/article/view/193/145 https://lajamjournal.org/index.php/lajam/article/view/193 doi:10.5597/lajam00049 |
op_doi |
https://doi.org/10.5597/lajam00049 |
container_title |
Latin American Journal of Aquatic Mammals |
container_volume |
3 |
container_issue |
1 |
_version_ |
1810480116525957120 |