Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes
On the basis of their thermal preferences, salmon introduced in South America can distribute over the whole Southern Patagonian Shelf Ecosystem (SPSE). Stable isotope (δ13C and δ15N) data show that the SPSE is dominated by zooplanktivorous species (15 of 37), and its community is distributed over si...
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ftconicet:oai:ri.conicet.gov.ar:11336/100002 2023-10-09T21:54:10+02:00 Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes Ciancio Blanc, Javier Ernesto Pascual, Miguel Alberto Botto, Florencia Frere, Esteban Iribarne, Oscar Osvaldo application/pdf http://hdl.handle.net/11336/100002 eng eng American Society of Limnology and Oceanography info:eu-repo/semantics/altIdentifier/url/https://aslopubs.onlinelibrary.wiley.com/doi/abs/10.4319/lo.2008.53.2.0788 info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.2008.53.2.0788 info:eu-repo/semantics/altIdentifier/url/https://www.semanticscholar.org/paper/Trophic-relationships-of-exotic-anadromous-in-the-Ciancio-Pascual/6ffee290429d91efc2e53f04a749c9ed8ed09972 http://hdl.handle.net/11336/100002 Ciancio Blanc, Javier Ernesto; Pascual, Miguel Alberto; Botto, Florencia; Frere, Esteban; Iribarne, Oscar Osvaldo; Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes; American Society of Limnology and Oceanography; Limnology and Oceanography; 53; 2; 12-2008; 788-798 0024-3590 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ STABLE ISOTOPES SALMONIDS TROPHIC RELATIONSHIPS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.4319/lo.2008.53.2.0788 2023-09-24T18:15:33Z On the basis of their thermal preferences, salmon introduced in South America can distribute over the whole Southern Patagonian Shelf Ecosystem (SPSE). Stable isotope (δ13C and δ15N) data show that the SPSE is dominated by zooplanktivorous species (15 of 37), and its community is distributed over six trophic levels (TL), with salmonids occupying levels 4.2 to 4.9. A dual isotope mixing model was used to estimate diet proportions of adult salmonids (validated with stomach content analyses) and showed that chinook salmon (TL 4.9) and brown trout (TL 4.7) feed largely on sprats (96% and 79% predicted by the model) and were clustered together with intermediate size fish and cephalopod predators (TL 4.6-5), a diet similar to that in their native ranges (North Pacific and North Atlantic Oceans). Adult anadromous rainbow trout clustered together with zooplanktivorous species (TL 3.2-4.4), and the model predicted a diet dominated by planktonic crustaceans (55%), very different from the diet dominated by fish and squids characteristic of adult steelhead in the North Pacific Ocean. Diet predictions based on stable isotopes for Chinook salmon were indistinguishable from direct assessments of stomach contents of fish captured by bottom trawlers and overlapped widely with the diet of Magellanic penguins. The lack of reports on captures of anadromous rainbow trout by bottom trawlers suggests that this species has a shallower distribution. Stable isotope data for rainbow trout are very similar to those of rockhopper penguins, which feed on planktonic crustaceans, fish larvae, and juveniles. Fil: Ciancio Blanc, Javier Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de ... Article in Journal/Newspaper North Atlantic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Austral Patagonia Pacific Argentina Limnology and Oceanography 53 2 788 798 |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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language |
English |
topic |
STABLE ISOTOPES SALMONIDS TROPHIC RELATIONSHIPS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
STABLE ISOTOPES SALMONIDS TROPHIC RELATIONSHIPS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Ciancio Blanc, Javier Ernesto Pascual, Miguel Alberto Botto, Florencia Frere, Esteban Iribarne, Oscar Osvaldo Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
topic_facet |
STABLE ISOTOPES SALMONIDS TROPHIC RELATIONSHIPS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
On the basis of their thermal preferences, salmon introduced in South America can distribute over the whole Southern Patagonian Shelf Ecosystem (SPSE). Stable isotope (δ13C and δ15N) data show that the SPSE is dominated by zooplanktivorous species (15 of 37), and its community is distributed over six trophic levels (TL), with salmonids occupying levels 4.2 to 4.9. A dual isotope mixing model was used to estimate diet proportions of adult salmonids (validated with stomach content analyses) and showed that chinook salmon (TL 4.9) and brown trout (TL 4.7) feed largely on sprats (96% and 79% predicted by the model) and were clustered together with intermediate size fish and cephalopod predators (TL 4.6-5), a diet similar to that in their native ranges (North Pacific and North Atlantic Oceans). Adult anadromous rainbow trout clustered together with zooplanktivorous species (TL 3.2-4.4), and the model predicted a diet dominated by planktonic crustaceans (55%), very different from the diet dominated by fish and squids characteristic of adult steelhead in the North Pacific Ocean. Diet predictions based on stable isotopes for Chinook salmon were indistinguishable from direct assessments of stomach contents of fish captured by bottom trawlers and overlapped widely with the diet of Magellanic penguins. The lack of reports on captures of anadromous rainbow trout by bottom trawlers suggests that this species has a shallower distribution. Stable isotope data for rainbow trout are very similar to those of rockhopper penguins, which feed on planktonic crustaceans, fish larvae, and juveniles. Fil: Ciancio Blanc, Javier Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de ... |
format |
Article in Journal/Newspaper |
author |
Ciancio Blanc, Javier Ernesto Pascual, Miguel Alberto Botto, Florencia Frere, Esteban Iribarne, Oscar Osvaldo |
author_facet |
Ciancio Blanc, Javier Ernesto Pascual, Miguel Alberto Botto, Florencia Frere, Esteban Iribarne, Oscar Osvaldo |
author_sort |
Ciancio Blanc, Javier Ernesto |
title |
Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
title_short |
Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
title_full |
Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
title_fullStr |
Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
title_full_unstemmed |
Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes |
title_sort |
trophic relationships of exotic anadromous salmonids in the southern patagonian shelf as inferred from stable isotopes |
publisher |
American Society of Limnology and Oceanography |
url |
http://hdl.handle.net/11336/100002 |
geographic |
Austral Patagonia Pacific Argentina |
geographic_facet |
Austral Patagonia Pacific Argentina |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://aslopubs.onlinelibrary.wiley.com/doi/abs/10.4319/lo.2008.53.2.0788 info:eu-repo/semantics/altIdentifier/doi/10.4319/lo.2008.53.2.0788 info:eu-repo/semantics/altIdentifier/url/https://www.semanticscholar.org/paper/Trophic-relationships-of-exotic-anadromous-in-the-Ciancio-Pascual/6ffee290429d91efc2e53f04a749c9ed8ed09972 http://hdl.handle.net/11336/100002 Ciancio Blanc, Javier Ernesto; Pascual, Miguel Alberto; Botto, Florencia; Frere, Esteban; Iribarne, Oscar Osvaldo; Trophic relationships of exotic anadromous salmonids in the southern Patagonian Shelf as inferred from stable isotopes; American Society of Limnology and Oceanography; Limnology and Oceanography; 53; 2; 12-2008; 788-798 0024-3590 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.4319/lo.2008.53.2.0788 |
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Limnology and Oceanography |
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53 |
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2 |
container_start_page |
788 |
op_container_end_page |
798 |
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1779317654369075200 |