Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake
Ambient light and temperature show extreme seasonal variation in subarctic lakes due to the midnight sun period in summer and cold polar night period in winter. These changes have clear impacts on fish feeding and reproduction cycles, potentially affecting the fatty acid (FA) composition of muscle....
Published in: | Freshwater Biology |
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Language: | English |
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Wiley-Blackwell Publishing Ltd.
2019
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Online Access: | http://urn.fi/URN:NBN:fi:jyu-201908293971 |
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/65365 2024-02-04T10:00:22+01:00 Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake Keva, Ossi Tang, Patrik Käkelä, Reijo Hayden, Brian Taipale, Sami J. Harrod, Chris Kahilainen, Kimmo K. 2019 application/pdf 1908-1920 fulltext http://urn.fi/URN:NBN:fi:jyu-201908293971 eng eng Wiley-Blackwell Publishing Ltd. Freshwater Biology 0046-5070 11 64 10.1111/fwb.13381 Keva, O., Tang, P., Käkelä, R., Hayden, B., Taipale, S. J., Harrod, C., & Kahilainen, K. K. (2019). Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake. Freshwater Biology , 64 (11), 1908-1920. https://doi.org/10.1111/fwb.13381 CONVID_32518405 URN:NBN:fi:jyu-201908293971 http://urn.fi/URN:NBN:fi:jyu-201908293971 In Copyright © 2019 John Wiley & Sons Ltd. openAccess http://rightsstatements.org/page/InC/1.0/?language=en annual diet shift highly unsaturated fatty acids n‐3/n‐6 spawning winter ecology kutu vaihtelu siika rasvahapot vuodenajat ravinto talvehtiminen article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2019 ftjyvaeskylaenun 2024-01-11T00:03:37Z Ambient light and temperature show extreme seasonal variation in subarctic lakes due to the midnight sun period in summer and cold polar night period in winter. These changes have clear impacts on fish feeding and reproduction cycles, potentially affecting the fatty acid (FA) composition of muscle. Despite extensive research into fish FA over recent decades, we know little about intra‐annual changes of fish FA profile and content. We studied intra‐annual changes in the FA profile (mol%) and content (mg g‐1 dry weight) of sexually mature European whitefish (Coregonus lavaretus) muscle in a large and deep subarctic lake located in northern Fennoscandia. We collected fish, zooplankton, and benthic macroinvertebrate samples during 3 ice‐covered months, including December (during whitefish spawning), and 3 open‐water months. Fish size, age, sex, stomach content and fullness, and gonadosomatic index were also assessed as co‐variates. Whitefish changed diet from benthic macroinvertebrates in winter to zooplankton in summer. Generally, whitefish somatic growth was slow and most energy was used for gonad growth. Zooplankton had higher total content and different profile of FA compared to benthic macroinvertebrates. Increased zooplanktivory in summer was detected with higher α‐linolenic acid (ALA, 18:3n‐3) and stearidonic acid (SDA, 18:4n‐3) percentage and content as well as increased the ratio of polyunsaturated FAs (PUFAs) of n‐3 and n‐6 family (n‐3/n‐6 ratio) in fish muscle. Whitefish gonadal growth and development occur during the summer growing season and continue until the initiation of spawning in early winter. We found that the content of physiologically crucial PUFA, eicosapentaenoic acid (EPA, 20:5n‐3), docosahexaenoic acid (DHA, 22:6n‐3), and arachidonic acid (ARA, 20:4n‐6) decreased by c. 60% between late summer and the spawning period in early winter. After spawning, total FA content of whitefish muscle increased rapidly, reaching the maximum recorded level in mid‐summer. Intra‐annual changes in whitefish ... Article in Journal/Newspaper Fennoscandia polar night Subarctic midnight sun JYX - Jyväskylä University Digital Archive Freshwater Biology 64 11 1908 1920 |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
annual diet shift highly unsaturated fatty acids n‐3/n‐6 spawning winter ecology kutu vaihtelu siika rasvahapot vuodenajat ravinto talvehtiminen |
spellingShingle |
annual diet shift highly unsaturated fatty acids n‐3/n‐6 spawning winter ecology kutu vaihtelu siika rasvahapot vuodenajat ravinto talvehtiminen Keva, Ossi Tang, Patrik Käkelä, Reijo Hayden, Brian Taipale, Sami J. Harrod, Chris Kahilainen, Kimmo K. Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
topic_facet |
annual diet shift highly unsaturated fatty acids n‐3/n‐6 spawning winter ecology kutu vaihtelu siika rasvahapot vuodenajat ravinto talvehtiminen |
description |
Ambient light and temperature show extreme seasonal variation in subarctic lakes due to the midnight sun period in summer and cold polar night period in winter. These changes have clear impacts on fish feeding and reproduction cycles, potentially affecting the fatty acid (FA) composition of muscle. Despite extensive research into fish FA over recent decades, we know little about intra‐annual changes of fish FA profile and content. We studied intra‐annual changes in the FA profile (mol%) and content (mg g‐1 dry weight) of sexually mature European whitefish (Coregonus lavaretus) muscle in a large and deep subarctic lake located in northern Fennoscandia. We collected fish, zooplankton, and benthic macroinvertebrate samples during 3 ice‐covered months, including December (during whitefish spawning), and 3 open‐water months. Fish size, age, sex, stomach content and fullness, and gonadosomatic index were also assessed as co‐variates. Whitefish changed diet from benthic macroinvertebrates in winter to zooplankton in summer. Generally, whitefish somatic growth was slow and most energy was used for gonad growth. Zooplankton had higher total content and different profile of FA compared to benthic macroinvertebrates. Increased zooplanktivory in summer was detected with higher α‐linolenic acid (ALA, 18:3n‐3) and stearidonic acid (SDA, 18:4n‐3) percentage and content as well as increased the ratio of polyunsaturated FAs (PUFAs) of n‐3 and n‐6 family (n‐3/n‐6 ratio) in fish muscle. Whitefish gonadal growth and development occur during the summer growing season and continue until the initiation of spawning in early winter. We found that the content of physiologically crucial PUFA, eicosapentaenoic acid (EPA, 20:5n‐3), docosahexaenoic acid (DHA, 22:6n‐3), and arachidonic acid (ARA, 20:4n‐6) decreased by c. 60% between late summer and the spawning period in early winter. After spawning, total FA content of whitefish muscle increased rapidly, reaching the maximum recorded level in mid‐summer. Intra‐annual changes in whitefish ... |
format |
Article in Journal/Newspaper |
author |
Keva, Ossi Tang, Patrik Käkelä, Reijo Hayden, Brian Taipale, Sami J. Harrod, Chris Kahilainen, Kimmo K. |
author_facet |
Keva, Ossi Tang, Patrik Käkelä, Reijo Hayden, Brian Taipale, Sami J. Harrod, Chris Kahilainen, Kimmo K. |
author_sort |
Keva, Ossi |
title |
Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
title_short |
Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
title_full |
Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
title_fullStr |
Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
title_full_unstemmed |
Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
title_sort |
seasonal changes in european whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake |
publisher |
Wiley-Blackwell Publishing Ltd. |
publishDate |
2019 |
url |
http://urn.fi/URN:NBN:fi:jyu-201908293971 |
genre |
Fennoscandia polar night Subarctic midnight sun |
genre_facet |
Fennoscandia polar night Subarctic midnight sun |
op_relation |
Freshwater Biology 0046-5070 11 64 10.1111/fwb.13381 Keva, O., Tang, P., Käkelä, R., Hayden, B., Taipale, S. J., Harrod, C., & Kahilainen, K. K. (2019). Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake. Freshwater Biology , 64 (11), 1908-1920. https://doi.org/10.1111/fwb.13381 CONVID_32518405 URN:NBN:fi:jyu-201908293971 http://urn.fi/URN:NBN:fi:jyu-201908293971 |
op_rights |
In Copyright © 2019 John Wiley & Sons Ltd. openAccess http://rightsstatements.org/page/InC/1.0/?language=en |
container_title |
Freshwater Biology |
container_volume |
64 |
container_issue |
11 |
container_start_page |
1908 |
op_container_end_page |
1920 |
_version_ |
1789965618179473408 |