Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position
Abstract Trophic transfer and retention of dietary compounds are vital for somatic development, reproduction, and survival of aquatic consumers. In this field study, stable carbon and nitrogen isotopes, and fatty acids (FA) contents in invertebrates and fishes of pre‐alpine Lake Lunz, Austria, were...
Published in: | Ecosphere |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | https://doi.org/10.1002/ecs2.1753 https://doaj.org/article/43ef5dd5a31245d2a142c3a76df930df |
id |
ftdoajarticles:oai:doaj.org/article:43ef5dd5a31245d2a142c3a76df930df |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:43ef5dd5a31245d2a142c3a76df930df 2023-05-15T14:30:13+02:00 Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position M. J. Kainz H. H. Hager S. Rasconi K. K. Kahilainen P.‐A. Amundsen B. Hayden 2017-04-01T00:00:00Z https://doi.org/10.1002/ecs2.1753 https://doaj.org/article/43ef5dd5a31245d2a142c3a76df930df EN eng Wiley https://doi.org/10.1002/ecs2.1753 https://doaj.org/toc/2150-8925 2150-8925 doi:10.1002/ecs2.1753 https://doaj.org/article/43ef5dd5a31245d2a142c3a76df930df Ecosphere, Vol 8, Iss 4, Pp n/a-n/a (2017) cyprinid fatty acids percid salmonid Special Feature: Biomarkers in Trophic Ecology stable isotopes Ecology QH540-549.5 article 2017 ftdoajarticles https://doi.org/10.1002/ecs2.1753 2022-12-31T15:09:02Z Abstract Trophic transfer and retention of dietary compounds are vital for somatic development, reproduction, and survival of aquatic consumers. In this field study, stable carbon and nitrogen isotopes, and fatty acids (FA) contents in invertebrates and fishes of pre‐alpine Lake Lunz, Austria, were used to (1) identify the resource use and trophic level of Arctic charr (Salvelinus alpinus), pike (Esox lucius), perch (Perca fluviatilis), brown trout (Salmo trutta), roach (Rutilus rutilus), and minnow (Phoxinus phoxinus) and (2) examine how polyunsaturated fatty acids (PUFA; i.e., omega‐3 and ‐6 PUFA) are related to total lipid status, littoral–pelagic reliance, and trophic position. Stable isotope data suggest that pike, perch, and minnow derived most of their energy from littoral resources, but minnows differed from pike and perch in their trophic position and PUFA composition. The co‐occurrence of cyprinids, percids, and pike segregated these fishes into more lipid‐rich (roach, minnow) and lipid‐poor (pike, percids) species. Although the relatively lipid‐poor pike and percids occupied a higher trophic position than cyprinids, there was a concurrent, total lipid‐dependent decline in omega‐3 and ‐6 PUFA in these predatory fishes. Results of this lake food‐web study demonstrated that total lipids in fish community, littoral–pelagic reliance, and trophic position explained omega‐3 and ‐6 PUFA in dorsal muscle tissues. Omega‐3 and ‐6 PUFA in these fishes decreased with increasing trophic position, demonstrating that these essential FAs did not biomagnify with increasing trophic level. Finally, this lake food‐web study provides evidence of fish community‐level relationship between total lipid status and PUFA or stable isotope ratios, whereas the strength of such relationships was less strong at the species level. Article in Journal/Newspaper Arctic charr Arctic Esox lucius Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Alpine Lake ENVELOPE(-129.182,-129.182,55.529,55.529) Minnows ENVELOPE(-65.359,-65.359,-66.027,-66.027) Ecosphere 8 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
cyprinid fatty acids percid salmonid Special Feature: Biomarkers in Trophic Ecology stable isotopes Ecology QH540-549.5 |
spellingShingle |
cyprinid fatty acids percid salmonid Special Feature: Biomarkers in Trophic Ecology stable isotopes Ecology QH540-549.5 M. J. Kainz H. H. Hager S. Rasconi K. K. Kahilainen P.‐A. Amundsen B. Hayden Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
topic_facet |
cyprinid fatty acids percid salmonid Special Feature: Biomarkers in Trophic Ecology stable isotopes Ecology QH540-549.5 |
description |
Abstract Trophic transfer and retention of dietary compounds are vital for somatic development, reproduction, and survival of aquatic consumers. In this field study, stable carbon and nitrogen isotopes, and fatty acids (FA) contents in invertebrates and fishes of pre‐alpine Lake Lunz, Austria, were used to (1) identify the resource use and trophic level of Arctic charr (Salvelinus alpinus), pike (Esox lucius), perch (Perca fluviatilis), brown trout (Salmo trutta), roach (Rutilus rutilus), and minnow (Phoxinus phoxinus) and (2) examine how polyunsaturated fatty acids (PUFA; i.e., omega‐3 and ‐6 PUFA) are related to total lipid status, littoral–pelagic reliance, and trophic position. Stable isotope data suggest that pike, perch, and minnow derived most of their energy from littoral resources, but minnows differed from pike and perch in their trophic position and PUFA composition. The co‐occurrence of cyprinids, percids, and pike segregated these fishes into more lipid‐rich (roach, minnow) and lipid‐poor (pike, percids) species. Although the relatively lipid‐poor pike and percids occupied a higher trophic position than cyprinids, there was a concurrent, total lipid‐dependent decline in omega‐3 and ‐6 PUFA in these predatory fishes. Results of this lake food‐web study demonstrated that total lipids in fish community, littoral–pelagic reliance, and trophic position explained omega‐3 and ‐6 PUFA in dorsal muscle tissues. Omega‐3 and ‐6 PUFA in these fishes decreased with increasing trophic position, demonstrating that these essential FAs did not biomagnify with increasing trophic level. Finally, this lake food‐web study provides evidence of fish community‐level relationship between total lipid status and PUFA or stable isotope ratios, whereas the strength of such relationships was less strong at the species level. |
format |
Article in Journal/Newspaper |
author |
M. J. Kainz H. H. Hager S. Rasconi K. K. Kahilainen P.‐A. Amundsen B. Hayden |
author_facet |
M. J. Kainz H. H. Hager S. Rasconi K. K. Kahilainen P.‐A. Amundsen B. Hayden |
author_sort |
M. J. Kainz |
title |
Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
title_short |
Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
title_full |
Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
title_fullStr |
Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
title_full_unstemmed |
Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
title_sort |
polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position |
publisher |
Wiley |
publishDate |
2017 |
url |
https://doi.org/10.1002/ecs2.1753 https://doaj.org/article/43ef5dd5a31245d2a142c3a76df930df |
long_lat |
ENVELOPE(-129.182,-129.182,55.529,55.529) ENVELOPE(-65.359,-65.359,-66.027,-66.027) |
geographic |
Arctic Alpine Lake Minnows |
geographic_facet |
Arctic Alpine Lake Minnows |
genre |
Arctic charr Arctic Esox lucius Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Esox lucius Salvelinus alpinus |
op_source |
Ecosphere, Vol 8, Iss 4, Pp n/a-n/a (2017) |
op_relation |
https://doi.org/10.1002/ecs2.1753 https://doaj.org/toc/2150-8925 2150-8925 doi:10.1002/ecs2.1753 https://doaj.org/article/43ef5dd5a31245d2a142c3a76df930df |
op_doi |
https://doi.org/10.1002/ecs2.1753 |
container_title |
Ecosphere |
container_volume |
8 |
container_issue |
4 |
_version_ |
1766304105876160512 |