South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia
Abstract de la Torriente, A., Quiñones, R. A., Miranda-Urbina, D. A., and Echevarría, F. 2010. South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia. – ICES Journal of Marine Science, 67: 294–303. The South American sea lion (Otaria...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp235 http://academic.oup.com/icesjms/article-pdf/67/2/294/29135090/fsp235.pdf |
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croxfordunivpr:10.1093/icesjms/fsp235 2024-03-24T09:05:50+00:00 South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia de la Torriente, Ana Quiñones, Renato A. Miranda-Urbina, Diego A. Echevarría, Fidel 2009 http://dx.doi.org/10.1093/icesjms/fsp235 http://academic.oup.com/icesjms/article-pdf/67/2/294/29135090/fsp235.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 67, issue 2, page 294-303 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp235 2024-02-26T16:28:06Z Abstract de la Torriente, A., Quiñones, R. A., Miranda-Urbina, D. A., and Echevarría, F. 2010. South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia. – ICES Journal of Marine Science, 67: 294–303. The South American sea lion (Otaria flavescens) is a pinniped known to interact with fisheries, potentially damaging gear and lowering catches. Predation by O. flavescens and spiny dogfish (Squalus acanthias) on artisanal southern hake (Merluccius australis) catches in fjords of Chilean Patagonia is estimated and compared. Observations were made in the Gulf of Ancud and Comau Fjord in southern Chile from October 2005 to September 2006. Losses of southern hake catches to O. flavescens predation were 1.6% of the total catch of the species, and to spiny dogfish predation were slightly higher, at 3.3%. The predation of both species on southern hake catches varied throughout the year, but was lower in summer. Both predators showed a preference for adult southern hake over juveniles. There was no significant relationship between predation on southern hake catches by the sea lion and the availability of adult and juvenile southern hake on longlines (AHCL). However, there was a significant relationship (p < 0.05) between AHCL and spiny dogfish predation. Most O. flavescens interaction events (81.4%) were during longline retrieval. Our results showed minimal interactions between O. flavescens and the artisanal southern hake fishery in the area, so with the present abundance of O. flavescens, there is no justification for reducing the sea lion population by hunting. Article in Journal/Newspaper spiny dogfish Squalus acanthias Oxford University Press Patagonia Hake ENVELOPE(15.612,15.612,66.797,66.797) ICES Journal of Marine Science 67 2 294 303 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography de la Torriente, Ana Quiñones, Renato A. Miranda-Urbina, Diego A. Echevarría, Fidel South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract de la Torriente, A., Quiñones, R. A., Miranda-Urbina, D. A., and Echevarría, F. 2010. South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia. – ICES Journal of Marine Science, 67: 294–303. The South American sea lion (Otaria flavescens) is a pinniped known to interact with fisheries, potentially damaging gear and lowering catches. Predation by O. flavescens and spiny dogfish (Squalus acanthias) on artisanal southern hake (Merluccius australis) catches in fjords of Chilean Patagonia is estimated and compared. Observations were made in the Gulf of Ancud and Comau Fjord in southern Chile from October 2005 to September 2006. Losses of southern hake catches to O. flavescens predation were 1.6% of the total catch of the species, and to spiny dogfish predation were slightly higher, at 3.3%. The predation of both species on southern hake catches varied throughout the year, but was lower in summer. Both predators showed a preference for adult southern hake over juveniles. There was no significant relationship between predation on southern hake catches by the sea lion and the availability of adult and juvenile southern hake on longlines (AHCL). However, there was a significant relationship (p < 0.05) between AHCL and spiny dogfish predation. Most O. flavescens interaction events (81.4%) were during longline retrieval. Our results showed minimal interactions between O. flavescens and the artisanal southern hake fishery in the area, so with the present abundance of O. flavescens, there is no justification for reducing the sea lion population by hunting. |
format |
Article in Journal/Newspaper |
author |
de la Torriente, Ana Quiñones, Renato A. Miranda-Urbina, Diego A. Echevarría, Fidel |
author_facet |
de la Torriente, Ana Quiñones, Renato A. Miranda-Urbina, Diego A. Echevarría, Fidel |
author_sort |
de la Torriente, Ana |
title |
South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
title_short |
South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
title_full |
South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
title_fullStr |
South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
title_full_unstemmed |
South American sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of Chilean Patagonia |
title_sort |
south american sea lion and spiny dogfish predation on artisanal catches of southern hake in fjords of chilean patagonia |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp235 http://academic.oup.com/icesjms/article-pdf/67/2/294/29135090/fsp235.pdf |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Patagonia Hake |
geographic_facet |
Patagonia Hake |
genre |
spiny dogfish Squalus acanthias |
genre_facet |
spiny dogfish Squalus acanthias |
op_source |
ICES Journal of Marine Science volume 67, issue 2, page 294-303 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp235 |
container_title |
ICES Journal of Marine Science |
container_volume |
67 |
container_issue |
2 |
container_start_page |
294 |
op_container_end_page |
303 |
_version_ |
1794407714112143360 |