Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis)
The Amazon River dolphin (Inia geoffrensis), or boto, is illegally harvested for use as bait in fisheries for the catfish Calophysus macropterus. To determine the effect of this harvest, we estimated apparent survival for a boto population in the central Brazilian Amazon where direct harvest is know...
| Autor principal: | Mintzer, Vanessa J. |
|---|---|
| Outros Autores: | Martin, Anthony Richard, Silva, Vera Maria Ferreira da, Barbour, Andrew B., Lorenzen, Kai, Frazer, Thomas Kerry |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Biological Conservation
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17914 |
| id |
oai:repositorio:1-17914 |
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| recordtype |
dspace |
| spelling |
oai:repositorio:1-17914 Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) Mintzer, Vanessa J. Martin, Anthony Richard Silva, Vera Maria Ferreira da Barbour, Andrew B. Lorenzen, Kai Frazer, Thomas Kerry Bait Dolphin Ecological Modeling Finfish Fishery Production Freshwater Environment Mark-recapture Method Poaching Resource Management Survival Sustainability Amazon River Brasil Inia Geoffrensis The Amazon River dolphin (Inia geoffrensis), or boto, is illegally harvested for use as bait in fisheries for the catfish Calophysus macropterus. To determine the effect of this harvest, we estimated apparent survival for a boto population in the central Brazilian Amazon where direct harvest is known to have occurred since 2000. For our analysis, we used capture and recapture/resighting data of 528 marked botos over a 17-year period (1994-2011). Time-dependent models estimated that apparent survival after the first reports of harvest (φ=0.899; SE=0.007) was significantly lower than in years prior to harvest (φ=0.968; SE=0.009). The decline in apparent survival suggests that current harvest rates exceed conservation limits and may be unsustainable. This issue requires the attention of natural resource managers from all countries of the Amazon basin, as the harvest is widespread and decline in survival could be mirrored in numerous locales. © 2012 Elsevier Ltd. 2020-06-15T21:50:05Z 2020-06-15T21:50:05Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/17914 10.1016/j.biocon.2012.10.006 en Volume 158, Pags. 280-286 Restrito Biological Conservation |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Bait Dolphin Ecological Modeling Finfish Fishery Production Freshwater Environment Mark-recapture Method Poaching Resource Management Survival Sustainability Amazon River Brasil Inia Geoffrensis |
| spellingShingle |
Bait Dolphin Ecological Modeling Finfish Fishery Production Freshwater Environment Mark-recapture Method Poaching Resource Management Survival Sustainability Amazon River Brasil Inia Geoffrensis Mintzer, Vanessa J. Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| topic_facet |
Bait Dolphin Ecological Modeling Finfish Fishery Production Freshwater Environment Mark-recapture Method Poaching Resource Management Survival Sustainability Amazon River Brasil Inia Geoffrensis |
| description |
The Amazon River dolphin (Inia geoffrensis), or boto, is illegally harvested for use as bait in fisheries for the catfish Calophysus macropterus. To determine the effect of this harvest, we estimated apparent survival for a boto population in the central Brazilian Amazon where direct harvest is known to have occurred since 2000. For our analysis, we used capture and recapture/resighting data of 528 marked botos over a 17-year period (1994-2011). Time-dependent models estimated that apparent survival after the first reports of harvest (φ=0.899; SE=0.007) was significantly lower than in years prior to harvest (φ=0.968; SE=0.009). The decline in apparent survival suggests that current harvest rates exceed conservation limits and may be unsustainable. This issue requires the attention of natural resource managers from all countries of the Amazon basin, as the harvest is widespread and decline in survival could be mirrored in numerous locales. © 2012 Elsevier Ltd. |
| format |
Artigo |
| author |
Mintzer, Vanessa J. |
| author2 |
Martin, Anthony Richard Silva, Vera Maria Ferreira da Barbour, Andrew B. Lorenzen, Kai Frazer, Thomas Kerry |
| author2Str |
Martin, Anthony Richard Silva, Vera Maria Ferreira da Barbour, Andrew B. Lorenzen, Kai Frazer, Thomas Kerry |
| title |
Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| title_short |
Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| title_full |
Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| title_fullStr |
Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| title_full_unstemmed |
Effect of illegal harvest on apparent survival of Amazon River dolphins (Inia geoffrensis) |
| title_sort |
effect of illegal harvest on apparent survival of amazon river dolphins (inia geoffrensis) |
| publisher |
Biological Conservation |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17914 |
| _version_ |
1787141933328498688 |
| score |
11.755432 |