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The European eel <jats:italic>Anguilla anguilla<\/jats:italic> goes through major biochemical and physiological changes throughout its lifecycle as it inhabits sea\u2010 (SW), and\/or brackish\u2010 (BW) and\/or freshwater (FW) habitats. With the ultimate goal being to understand the reasons for eels adopting a certain life history strategy (FW or SW residency <jats:italic>vs<\/jats:italic>. \u2018habitat shifting\u2019), we explored differences in lipid content and FA composition of muscle, liver and eyes from eels collected across Norwegian SW, BW and FW habitats, and at different lifecycle stages (yellow to silver). FW and SW eels had a higher lipid content overall compared to BW eels, reflecting differences in food availability and life history strategies. SW eels had higher proportions of certain monounsaturated FAs (MUFAs; 18:1n\u20109, 20:1n\u20109), and of the essential polyunsaturated FAs 20:5n\u20103 (eicosapentaenoic acid, EPA) and 22:6n\u20103 (docosahexaenoic acid) than FW eels, reflecting a marine\u2010based diet. In contrast, the muscle of FW eels had higher proportions of 18:3n\u20103, 18:2n\u20106 and 20:4n\u20106 (arachidonic acid), as is typical of FW organisms. MUFA proportions increased in later stage eels, consistent with the hypothesis that the eels accumulate energy stores prior to migration. In addition, the decrease of EPA with advancing stage may be associated with the critical role that this FA plays in eel sexual development. Lipid and FA information provided further understanding of the habitat use and overall ecology of this critically endangered species.<\/jats:p>","DOI":"10.1111\/jfb.14815","type":"journal-article","created":{"date-parts":[[2021,6,1]],"date-time":"2021-06-01T07:41:03Z","timestamp":1622533263000},"page":"1110-1124","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Feeding habitat and silvering stage affect lipid content and fatty acid composition of <scp>European<\/scp> eel <scp><i>Anguilla anguilla<\/i><\/scp> tissues"],"prefix":"10.1111","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9545-9097","authenticated-orcid":false,"given":"Camilla","family":"Parzanini","sequence":"first","affiliation":[{"name":"Department of Chemistry and Biology Ryerson University  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael T.","family":"Arts","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biology Ryerson University  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mehis","family":"Rohtla","sequence":"additional","affiliation":[{"name":"Ecosystem Acoustics Group Austevoll Research Station, Institute of Marine Research  Storeb\u00f8 Norway"},{"name":"Estonian Marine Institute University of Tartu  Tartu Estonia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janet","family":"Koprivnikar","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biology Ryerson University  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Power","sequence":"additional","affiliation":[{"name":"Department of Biology University of Waterloo  Waterloo Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne Berit","family":"Skiftesvik","sequence":"additional","affiliation":[{"name":"Ecosystem Acoustics Group Austevoll Research Station, Institute of Marine Research  Storeb\u00f8 Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Howard I.","family":"Browman","sequence":"additional","affiliation":[{"name":"Ecosystem Acoustics Group Austevoll Research Station, Institute of Marine Research  Storeb\u00f8 Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dino","family":"Milotic","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biology Ryerson University  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caroline M. 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