Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina
- Autores
- Gonzalez Zevallos, Diego Ricardo; Yorio, Pablo Martin
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We studied discard use and incidental mortality of seabirds attracted to high-sea trawl vessels operating in the Golfo San Jorge, Argentina, during the height of the fishing season in 2003 and 2004. Fourteen seabird species ate food made available by fishing operations. The most frequent and abundant seabirds (percent occurrence, mean number per haul) were the kelp gull Larus dominicanus (98.9%, 207.0), the black-browed albatross Thalassarche melanophrys (98.9%, 94.2) and the white-chinned petrel Procellaria aequinoctialis (91%, 8.4). Flock sizes for the 3 species var- ied from a few to a maximum of 1600 birds. Total seabird abundance varied significantly between stages of the fishing operation, being higher during discarding and haulback than during towing. Incidental capture of seabirds in nets was recorded in 37% of 89 hauls, with a mean capture rate of 1.2 birds per haul. Species incidentally caught were the great shearwater Puffinus gravis , the imper- ial cormorant Phalacrocorax atriceps and the Magellanic penguin Spheniscus magellanicus , with rates that varied between months and years. Considering the fishery’s fishing effort, the estimated total numbers of birds killed during the study were 2254 great shearwaters (CV = 1.1), 1233 imperial cormorants (CV = 1.1) and 35 Magellanic penguins (CV = 2.4) in 2003, and 311 imperial cormorants (CV = 1.7) and 1516 Magellanic penguins (CV = 1.1) in 2004. Black-browed albatrosses and kelp gulls were also struck by the warp cable while feeding on discards from the surface, and drowned when they were dragged underwater. The results obtained in this study show that the hake trawl fishery operating in the Golfo San Jorge may have a significant effect on some seabird populations through the provision of fishing discards and incidental mortality.
Fil: Gonzalez Zevallos, Diego Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia; Argentina
Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina - Materia
-
SEABIRD-FISHERY INTERACTIONS
DISCARDS
INCIDENTAL MORTALITY
TRAWL FISHERIES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/16764
Ver los metadatos del registro completo
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spelling |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, ArgentinaGonzalez Zevallos, Diego RicardoYorio, Pablo MartinSEABIRD-FISHERY INTERACTIONSDISCARDSINCIDENTAL MORTALITYTRAWL FISHERIEShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We studied discard use and incidental mortality of seabirds attracted to high-sea trawl vessels operating in the Golfo San Jorge, Argentina, during the height of the fishing season in 2003 and 2004. Fourteen seabird species ate food made available by fishing operations. The most frequent and abundant seabirds (percent occurrence, mean number per haul) were the kelp gull Larus dominicanus (98.9%, 207.0), the black-browed albatross Thalassarche melanophrys (98.9%, 94.2) and the white-chinned petrel Procellaria aequinoctialis (91%, 8.4). Flock sizes for the 3 species var- ied from a few to a maximum of 1600 birds. Total seabird abundance varied significantly between stages of the fishing operation, being higher during discarding and haulback than during towing. Incidental capture of seabirds in nets was recorded in 37% of 89 hauls, with a mean capture rate of 1.2 birds per haul. Species incidentally caught were the great shearwater Puffinus gravis , the imper- ial cormorant Phalacrocorax atriceps and the Magellanic penguin Spheniscus magellanicus , with rates that varied between months and years. Considering the fishery’s fishing effort, the estimated total numbers of birds killed during the study were 2254 great shearwaters (CV = 1.1), 1233 imperial cormorants (CV = 1.1) and 35 Magellanic penguins (CV = 2.4) in 2003, and 311 imperial cormorants (CV = 1.7) and 1516 Magellanic penguins (CV = 1.1) in 2004. Black-browed albatrosses and kelp gulls were also struck by the warp cable while feeding on discards from the surface, and drowned when they were dragged underwater. The results obtained in this study show that the hake trawl fishery operating in the Golfo San Jorge may have a significant effect on some seabird populations through the provision of fishing discards and incidental mortality.Fil: Gonzalez Zevallos, Diego Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia; ArgentinaFil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaInter-research2006-07-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16764Gonzalez Zevallos, Diego Ricardo; Yorio, Pablo Martin; Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina; Inter-research; Marine Ecology Progress Series; 316; 3-7-2006; 175-1830171-8630enginfo:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v316/p175-183/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:56:46Zoai:ri.conicet.gov.ar:11336/16764instacron: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:34982025-09-03 09:56:46.788CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
title |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
spellingShingle |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina Gonzalez Zevallos, Diego Ricardo SEABIRD-FISHERY INTERACTIONS DISCARDS INCIDENTAL MORTALITY TRAWL FISHERIES |
title_short |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
title_full |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
title_fullStr |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
title_full_unstemmed |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
title_sort |
Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina |
dc.creator.none.fl_str_mv |
Gonzalez Zevallos, Diego Ricardo Yorio, Pablo Martin |
author |
Gonzalez Zevallos, Diego Ricardo |
author_facet |
Gonzalez Zevallos, Diego Ricardo Yorio, Pablo Martin |
author_role |
author |
author2 |
Yorio, Pablo Martin |
author2_role |
author |
dc.subject.none.fl_str_mv |
SEABIRD-FISHERY INTERACTIONS DISCARDS INCIDENTAL MORTALITY TRAWL FISHERIES |
topic |
SEABIRD-FISHERY INTERACTIONS DISCARDS INCIDENTAL MORTALITY TRAWL 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 |
We studied discard use and incidental mortality of seabirds attracted to high-sea trawl vessels operating in the Golfo San Jorge, Argentina, during the height of the fishing season in 2003 and 2004. Fourteen seabird species ate food made available by fishing operations. The most frequent and abundant seabirds (percent occurrence, mean number per haul) were the kelp gull Larus dominicanus (98.9%, 207.0), the black-browed albatross Thalassarche melanophrys (98.9%, 94.2) and the white-chinned petrel Procellaria aequinoctialis (91%, 8.4). Flock sizes for the 3 species var- ied from a few to a maximum of 1600 birds. Total seabird abundance varied significantly between stages of the fishing operation, being higher during discarding and haulback than during towing. Incidental capture of seabirds in nets was recorded in 37% of 89 hauls, with a mean capture rate of 1.2 birds per haul. Species incidentally caught were the great shearwater Puffinus gravis , the imper- ial cormorant Phalacrocorax atriceps and the Magellanic penguin Spheniscus magellanicus , with rates that varied between months and years. Considering the fishery’s fishing effort, the estimated total numbers of birds killed during the study were 2254 great shearwaters (CV = 1.1), 1233 imperial cormorants (CV = 1.1) and 35 Magellanic penguins (CV = 2.4) in 2003, and 311 imperial cormorants (CV = 1.7) and 1516 Magellanic penguins (CV = 1.1) in 2004. Black-browed albatrosses and kelp gulls were also struck by the warp cable while feeding on discards from the surface, and drowned when they were dragged underwater. The results obtained in this study show that the hake trawl fishery operating in the Golfo San Jorge may have a significant effect on some seabird populations through the provision of fishing discards and incidental mortality. Fil: Gonzalez Zevallos, Diego Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia; Argentina Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina |
description |
We studied discard use and incidental mortality of seabirds attracted to high-sea trawl vessels operating in the Golfo San Jorge, Argentina, during the height of the fishing season in 2003 and 2004. Fourteen seabird species ate food made available by fishing operations. The most frequent and abundant seabirds (percent occurrence, mean number per haul) were the kelp gull Larus dominicanus (98.9%, 207.0), the black-browed albatross Thalassarche melanophrys (98.9%, 94.2) and the white-chinned petrel Procellaria aequinoctialis (91%, 8.4). Flock sizes for the 3 species var- ied from a few to a maximum of 1600 birds. Total seabird abundance varied significantly between stages of the fishing operation, being higher during discarding and haulback than during towing. Incidental capture of seabirds in nets was recorded in 37% of 89 hauls, with a mean capture rate of 1.2 birds per haul. Species incidentally caught were the great shearwater Puffinus gravis , the imper- ial cormorant Phalacrocorax atriceps and the Magellanic penguin Spheniscus magellanicus , with rates that varied between months and years. Considering the fishery’s fishing effort, the estimated total numbers of birds killed during the study were 2254 great shearwaters (CV = 1.1), 1233 imperial cormorants (CV = 1.1) and 35 Magellanic penguins (CV = 2.4) in 2003, and 311 imperial cormorants (CV = 1.7) and 1516 Magellanic penguins (CV = 1.1) in 2004. Black-browed albatrosses and kelp gulls were also struck by the warp cable while feeding on discards from the surface, and drowned when they were dragged underwater. The results obtained in this study show that the hake trawl fishery operating in the Golfo San Jorge may have a significant effect on some seabird populations through the provision of fishing discards and incidental mortality. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-07-03 |
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/11336/16764 Gonzalez Zevallos, Diego Ricardo; Yorio, Pablo Martin; Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina; Inter-research; Marine Ecology Progress Series; 316; 3-7-2006; 175-183 0171-8630 |
url |
http://hdl.handle.net/11336/16764 |
identifier_str_mv |
Gonzalez Zevallos, Diego Ricardo; Yorio, Pablo Martin; Seabird use of discards and incidental captures at the Argentine hake trawl fishery in the Golfo San Jorge, Argentina; Inter-research; Marine Ecology Progress Series; 316; 3-7-2006; 175-183 0171-8630 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v316/p175-183/ |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Inter-research |
publisher.none.fl_str_mv |
Inter-research |
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 |
_version_ |
1842269423085289472 |
score |
13.13397 |