Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia
A combination of stomach content and nitrogen (δ 15 N) and carbon (δ 13 C) stable-isotope analysis was used to assess the trophic interactions and feeding habits of three notothenioid coastal fish (Champsocephalus esox, Patagonotothen tessellata and Patagonotothen cornucola and one exotic salmon spe...
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ftjpolarres:oai:journals.openacademia.net:article/2632 2023-05-15T14:01:21+02:00 Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia Hüne, Mathias Davis, Ernesto Murcia, Silvia Gutiérrez, David Haro, Daniela 2018-02-27 application/pdf application/xml https://polarresearch.net/index.php/polar/article/view/2632 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2632/6019 https://polarresearch.net/index.php/polar/article/view/2632/6020 https://polarresearch.net/index.php/polar/article/view/2632 Polar Research; Vol 37 (2018) 1751-8369 Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftjpolarres 2021-11-11T19:13:09Z A combination of stomach content and nitrogen (δ 15 N) and carbon (δ 13 C) stable-isotope analysis was used to assess the trophic interactions and feeding habits of three notothenioid coastal fish (Champsocephalus esox, Patagonotothen tessellata and Patagonotothen cornucola and one exotic salmon species (Oncorhynchus tschawytscha)with diverse life habits (benthic and benthopelagic) in the Francisco Coloane Coastal Marine Protected Area, southern Chile. The stomach contents of C. esox were mainly fish; those of P. cornucola and O. tschawytscha were crustacean decapods, Munida gregaria . A cluster analysis on isotope data and stable-isotope Bayesian ellipses detected two different predator groups, one with benthopelagic habits (C. esox and O. tshawytscha)and one with benthic habits (P. cornucola and P. tessellata). These results were supported with similar isotopic trophic level of each group. We suggest that the exotic salmon O. tschawytscha is a generalist predator with a broad trophic niche that may compete with the native notothenioid C. esox , as both have equivalent trophic levels with substantial overlap. This preliminary study is the first on trophic relationships of a subtidal fish assemblage within a remote ecosystem of fjords and channels in Chile’s southern Patagonia. Article in Journal/Newspaper Antarc* Antarctic Polar Research Polar Research (E-Journal) Antarctic Patagonia |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic |
spellingShingle |
Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic Hüne, Mathias Davis, Ernesto Murcia, Silvia Gutiérrez, David Haro, Daniela Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
topic_facet |
Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic |
description |
A combination of stomach content and nitrogen (δ 15 N) and carbon (δ 13 C) stable-isotope analysis was used to assess the trophic interactions and feeding habits of three notothenioid coastal fish (Champsocephalus esox, Patagonotothen tessellata and Patagonotothen cornucola and one exotic salmon species (Oncorhynchus tschawytscha)with diverse life habits (benthic and benthopelagic) in the Francisco Coloane Coastal Marine Protected Area, southern Chile. The stomach contents of C. esox were mainly fish; those of P. cornucola and O. tschawytscha were crustacean decapods, Munida gregaria . A cluster analysis on isotope data and stable-isotope Bayesian ellipses detected two different predator groups, one with benthopelagic habits (C. esox and O. tshawytscha)and one with benthic habits (P. cornucola and P. tessellata). These results were supported with similar isotopic trophic level of each group. We suggest that the exotic salmon O. tschawytscha is a generalist predator with a broad trophic niche that may compete with the native notothenioid C. esox , as both have equivalent trophic levels with substantial overlap. This preliminary study is the first on trophic relationships of a subtidal fish assemblage within a remote ecosystem of fjords and channels in Chile’s southern Patagonia. |
format |
Article in Journal/Newspaper |
author |
Hüne, Mathias Davis, Ernesto Murcia, Silvia Gutiérrez, David Haro, Daniela |
author_facet |
Hüne, Mathias Davis, Ernesto Murcia, Silvia Gutiérrez, David Haro, Daniela |
author_sort |
Hüne, Mathias |
title |
Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
title_short |
Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
title_full |
Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
title_fullStr |
Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
title_full_unstemmed |
Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia |
title_sort |
trophic relationships of a subtidal fish assemblage in the francisco coloane coastal marine protected area, southern chilean patagonia |
publisher |
Norwegian Polar Institute |
publishDate |
2018 |
url |
https://polarresearch.net/index.php/polar/article/view/2632 |
geographic |
Antarctic Patagonia |
geographic_facet |
Antarctic Patagonia |
genre |
Antarc* Antarctic Polar Research |
genre_facet |
Antarc* Antarctic Polar Research |
op_source |
Polar Research; Vol 37 (2018) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2632/6019 https://polarresearch.net/index.php/polar/article/view/2632/6020 https://polarresearch.net/index.php/polar/article/view/2632 |
_version_ |
1766271086186463232 |