Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis
We combined fatty acid (FA) and stable isotope (SI) analyses to investigate the trophic ecology of different stages of European eels (Anguilla anguilla) across seawater (SW), brackish water (BW), and freshwater (FW) habitats. Salinity was the main driver of differences in the biochemical composition...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | https://hdl.handle.net/11250/2978157 https://doi.org/10.1139/cjfas-2020-0432 |
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ftimr:oai:imr.brage.unit.no:11250/2978157 2023-05-15T13:26:59+02:00 Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis Parzanini, Camilla Arts, Michael T. Power, Michael Rohtla, Mehis Skiftesvik, Anne Berit Koprivnikar, Janet Browman, Howard Milotic, Dino Durif, Caroline 2021 application/pdf https://hdl.handle.net/11250/2978157 https://doi.org/10.1139/cjfas-2020-0432 eng eng Norges forskningsråd: 280658 Canadian Journal of Fisheries and Aquatic Sciences. 2021, 78 (11), 1721-1731. urn:issn:0706-652X https://hdl.handle.net/11250/2978157 https://doi.org/10.1139/cjfas-2020-0432 cristin:1998100 1721-1731 78 Canadian Journal of Fisheries and Aquatic Sciences 11 Peer reviewed Journal article 2021 ftimr https://doi.org/10.1139/cjfas-2020-0432 2022-02-16T23:38:53Z We combined fatty acid (FA) and stable isotope (SI) analyses to investigate the trophic ecology of different stages of European eels (Anguilla anguilla) across seawater (SW), brackish water (BW), and freshwater (FW) habitats. Salinity was the main driver of differences in the biochemical composition, and the greatest variation occurred between SW and FW eels. SW eels had a higher content of the FA indicator of carnivory, as well as the highest stable isotope ratios (C, N). In contrast, FW eels exhibited the highest lipid content and omega-6 polyunsaturated FA, but the lowest stable isotope ratios, suggesting major dietary differences between the eels in these two habitats. While the biochemical composition of BW eels was closer to those of SW eels, BW eels had the largest SI range, indicating higher dietary plasticity. FW individuals had better overall condition compared to SW eels. Independent of habitat, larger individuals were in the best condition, and had higher lipid content and monounsaturated FA. These findings suggest a biological advantage for eels to maintain a catadromous life history strategy. publishedVersion Article in Journal/Newspaper Anguilla anguilla Institute for Marine Research: Brage IMR Canadian Journal of Fisheries and Aquatic Sciences 78 11 1721 1731 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
We combined fatty acid (FA) and stable isotope (SI) analyses to investigate the trophic ecology of different stages of European eels (Anguilla anguilla) across seawater (SW), brackish water (BW), and freshwater (FW) habitats. Salinity was the main driver of differences in the biochemical composition, and the greatest variation occurred between SW and FW eels. SW eels had a higher content of the FA indicator of carnivory, as well as the highest stable isotope ratios (C, N). In contrast, FW eels exhibited the highest lipid content and omega-6 polyunsaturated FA, but the lowest stable isotope ratios, suggesting major dietary differences between the eels in these two habitats. While the biochemical composition of BW eels was closer to those of SW eels, BW eels had the largest SI range, indicating higher dietary plasticity. FW individuals had better overall condition compared to SW eels. Independent of habitat, larger individuals were in the best condition, and had higher lipid content and monounsaturated FA. These findings suggest a biological advantage for eels to maintain a catadromous life history strategy. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Parzanini, Camilla Arts, Michael T. Power, Michael Rohtla, Mehis Skiftesvik, Anne Berit Koprivnikar, Janet Browman, Howard Milotic, Dino Durif, Caroline |
spellingShingle |
Parzanini, Camilla Arts, Michael T. Power, Michael Rohtla, Mehis Skiftesvik, Anne Berit Koprivnikar, Janet Browman, Howard Milotic, Dino Durif, Caroline Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
author_facet |
Parzanini, Camilla Arts, Michael T. Power, Michael Rohtla, Mehis Skiftesvik, Anne Berit Koprivnikar, Janet Browman, Howard Milotic, Dino Durif, Caroline |
author_sort |
Parzanini, Camilla |
title |
Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
title_short |
Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
title_full |
Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
title_fullStr |
Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
title_full_unstemmed |
Trophic ecology of the european eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
title_sort |
trophic ecology of the european eel (anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2978157 https://doi.org/10.1139/cjfas-2020-0432 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
1721-1731 78 Canadian Journal of Fisheries and Aquatic Sciences 11 |
op_relation |
Norges forskningsråd: 280658 Canadian Journal of Fisheries and Aquatic Sciences. 2021, 78 (11), 1721-1731. urn:issn:0706-652X https://hdl.handle.net/11250/2978157 https://doi.org/10.1139/cjfas-2020-0432 cristin:1998100 |
op_doi |
https://doi.org/10.1139/cjfas-2020-0432 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
78 |
container_issue |
11 |
container_start_page |
1721 |
op_container_end_page |
1731 |
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1766395680723566592 |