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 (δ15N) and carbon (δ13C) 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 specie...
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Norwegian Polar Institute
2018
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ftdoajarticles:oai:doaj.org/article:2d1842f3a8eb4339a27d7fbb564e004f 2023-05-15T13:57:13+02:00 Trophic relationships of a subtidal fish assemblage in the Francisco Coloane Coastal Marine Protected Area, southern Chilean Patagonia Mathias Hüne Ernesto Davis Silvia Murcia David Gutiérrez Daniela Haro 2018-01-01T00:00:00Z https://doi.org/10.1080/17518369.2018.1435107 https://doaj.org/article/2d1842f3a8eb4339a27d7fbb564e004f EN eng Norwegian Polar Institute http://dx.doi.org/10.1080/17518369.2018.1435107 https://doaj.org/toc/1751-8369 1751-8369 doi:10.1080/17518369.2018.1435107 https://doaj.org/article/2d1842f3a8eb4339a27d7fbb564e004f Polar Research, Vol 37, Iss 1 (2018) Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic Environmental sciences GE1-350 Oceanography GC1-1581 article 2018 ftdoajarticles https://doi.org/10.1080/17518369.2018.1435107 2022-12-31T13:10:07Z A combination of stomach content and nitrogen (δ15N) and carbon (δ13C) 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 Directory of Open Access Journals: DOAJ Articles Antarctic Patagonia Polar Research 37 1 1435107 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Notothenioidei exotic salmonid trophic level feeding habits Magellan region sub-Antarctic Environmental sciences GE1-350 Oceanography GC1-1581 Mathias Hüne Ernesto Davis Silvia Murcia David Gutiérrez Daniela Haro 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 Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
A combination of stomach content and nitrogen (δ15N) and carbon (δ13C) 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 |
Mathias Hüne Ernesto Davis Silvia Murcia David Gutiérrez Daniela Haro |
author_facet |
Mathias Hüne Ernesto Davis Silvia Murcia David Gutiérrez Daniela Haro |
author_sort |
Mathias Hüne |
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://doi.org/10.1080/17518369.2018.1435107 https://doaj.org/article/2d1842f3a8eb4339a27d7fbb564e004f |
geographic |
Antarctic Patagonia |
geographic_facet |
Antarctic Patagonia |
genre |
Antarc* Antarctic Polar Research |
genre_facet |
Antarc* Antarctic Polar Research |
op_source |
Polar Research, Vol 37, Iss 1 (2018) |
op_relation |
http://dx.doi.org/10.1080/17518369.2018.1435107 https://doaj.org/toc/1751-8369 1751-8369 doi:10.1080/17518369.2018.1435107 https://doaj.org/article/2d1842f3a8eb4339a27d7fbb564e004f |
op_doi |
https://doi.org/10.1080/17518369.2018.1435107 |
container_title |
Polar Research |
container_volume |
37 |
container_issue |
1 |
container_start_page |
1435107 |
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1766264813069008896 |