Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago
International audience Abstract In 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to colonize adjacent watersheds, however, recent and u...
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ftinraparis:oai:HAL:hal-03451892v1 2024-09-15T17:43:40+00:00 Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago Davidsen, Jan, Grimsrud Bordeleau, Xavier Eldøy, Sindre, Håvarstein Whoriskey, Frederick Power, Michael Crossin, Glenn, T Buhariwalla, Colin Gaudin, Philippe NTNU University Museum Trondheim Norwegian University of Science and Technology Trondheim (NTNU) Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU) Department of Biology (Dalhousie University) Dalhousie University Halifax Institut Maurice-Lamontagne Pêches et Oceans Canada Ocean Tracking network University of Waterloo Waterloo Nova Scotia Department of Fisheries and Aquaculture Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Université de Pau et des Pays de l'Adour (UPPA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) French Polar Institute (IPEV, Institut Polaire Paul-Emile Victor) / SALMEVOL Program LTSER (Zone Atelier Antarctique et Terres Australes) NTNU University Museum Dalhousie University's Ocean Tracking Network Natural Sciences and Engineering Research Council of Canada (NSERC) 2021-12 https://hal.inrae.fr/hal-03451892 https://hal.inrae.fr/hal-03451892/document https://hal.inrae.fr/hal-03451892/file/2021_Davidsen_ScientificReports.pdf https://doi.org/10.1038/s41598-021-91405-x en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-021-91405-x info:eu-repo/semantics/altIdentifier/pmid/34099778 hal-03451892 https://hal.inrae.fr/hal-03451892 https://hal.inrae.fr/hal-03451892/document https://hal.inrae.fr/hal-03451892/file/2021_Davidsen_ScientificReports.pdf doi:10.1038/s41598-021-91405-x PUBMED: 34099778 WOS: 000662871900022 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.inrae.fr/hal-03451892 Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-91405-x⟩ kerguelen antarctic marine habitat feeding ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2021 ftinraparis https://doi.org/10.1038/s41598-021-91405-x 2024-09-03T14:37:19Z International audience Abstract In 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to colonize adjacent watersheds, however, recent and unexpectedly the spread has slowed. To better understand the ecology of the brown trout here, and why their expansion has slowed, we documented the marine habitat use, foraging ecology, and environmental conditions experienced over one year by 50 acoustically tagged individuals at the colonization front. Trout mainly utilized the marine habitat proximate to their tagging site, ranging no further than 7 km and not entering any uncolonized watersheds. Nutritional indicators showed that trout were in good condition at the time of tagging. Stomach contents and isotope signatures in muscle of additional trout revealed a diet of amphipods (68%), fish (23%), isopods (6%), and zooplankton (6%). The small migration distances observed, presence of suitable habitat, and rich local foraging opportunities suggest that trout can achieve their resource needs close to their home rivers. This may explain why the expansion of brown trout at Kerguelen has slowed. Article in Journal/Newspaper Antarc* Antarctic Institut National de la Recherche Agronomique: ProdINRA Scientific Reports 11 1 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
kerguelen antarctic marine habitat feeding ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
kerguelen antarctic marine habitat feeding ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment Davidsen, Jan, Grimsrud Bordeleau, Xavier Eldøy, Sindre, Håvarstein Whoriskey, Frederick Power, Michael Crossin, Glenn, T Buhariwalla, Colin Gaudin, Philippe Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
topic_facet |
kerguelen antarctic marine habitat feeding ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Abstract In 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to colonize adjacent watersheds, however, recent and unexpectedly the spread has slowed. To better understand the ecology of the brown trout here, and why their expansion has slowed, we documented the marine habitat use, foraging ecology, and environmental conditions experienced over one year by 50 acoustically tagged individuals at the colonization front. Trout mainly utilized the marine habitat proximate to their tagging site, ranging no further than 7 km and not entering any uncolonized watersheds. Nutritional indicators showed that trout were in good condition at the time of tagging. Stomach contents and isotope signatures in muscle of additional trout revealed a diet of amphipods (68%), fish (23%), isopods (6%), and zooplankton (6%). The small migration distances observed, presence of suitable habitat, and rich local foraging opportunities suggest that trout can achieve their resource needs close to their home rivers. This may explain why the expansion of brown trout at Kerguelen has slowed. |
author2 |
NTNU University Museum Trondheim Norwegian University of Science and Technology Trondheim (NTNU) Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU) Department of Biology (Dalhousie University) Dalhousie University Halifax Institut Maurice-Lamontagne Pêches et Oceans Canada Ocean Tracking network University of Waterloo Waterloo Nova Scotia Department of Fisheries and Aquaculture Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Université de Pau et des Pays de l'Adour (UPPA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) French Polar Institute (IPEV, Institut Polaire Paul-Emile Victor) / SALMEVOL Program LTSER (Zone Atelier Antarctique et Terres Australes) NTNU University Museum Dalhousie University's Ocean Tracking Network Natural Sciences and Engineering Research Council of Canada (NSERC) |
format |
Article in Journal/Newspaper |
author |
Davidsen, Jan, Grimsrud Bordeleau, Xavier Eldøy, Sindre, Håvarstein Whoriskey, Frederick Power, Michael Crossin, Glenn, T Buhariwalla, Colin Gaudin, Philippe |
author_facet |
Davidsen, Jan, Grimsrud Bordeleau, Xavier Eldøy, Sindre, Håvarstein Whoriskey, Frederick Power, Michael Crossin, Glenn, T Buhariwalla, Colin Gaudin, Philippe |
author_sort |
Davidsen, Jan, Grimsrud |
title |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
title_short |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
title_full |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
title_fullStr |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
title_full_unstemmed |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
title_sort |
marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-antarctic kerguelen archipelago |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.inrae.fr/hal-03451892 https://hal.inrae.fr/hal-03451892/document https://hal.inrae.fr/hal-03451892/file/2021_Davidsen_ScientificReports.pdf https://doi.org/10.1038/s41598-021-91405-x |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.inrae.fr/hal-03451892 Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-91405-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-021-91405-x info:eu-repo/semantics/altIdentifier/pmid/34099778 hal-03451892 https://hal.inrae.fr/hal-03451892 https://hal.inrae.fr/hal-03451892/document https://hal.inrae.fr/hal-03451892/file/2021_Davidsen_ScientificReports.pdf doi:10.1038/s41598-021-91405-x PUBMED: 34099778 WOS: 000662871900022 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-021-91405-x |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
_version_ |
1810490766267514880 |