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...

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Published in:Canadian journal of fisheries and aquatic sciences 2021-11, Vol.78 (11), p.1721-1731
Main Authors: Parzanini, Camilla, Arts, Michael T, Power, Michael, Rohtla, Mehis, Skiftesvik, Anne Berit, Koprivnikar, Janet, Browman, Howard I, Milotic, Dino, Durif, Caroline M.F
Format: Article
Language:English
Subjects:
Anguilla anguilla
Biochemical composition
Brackish water
Carnivory
Chemical analysis
Composition
Eels
Fatty acids
Habitats
Isotope ratios
Isotopes
Life history
Lipids
Salinity
Salinity effects
Seawater
Stable isotopes
Water analysis
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cited_by cdi_FETCH-LOGICAL-c591t-a856acb181c6e393fa4ed81e2d6240f86ca94d64e7ddfe9772c8d76f103cfb863
cites cdi_FETCH-LOGICAL-c591t-a856acb181c6e393fa4ed81e2d6240f86ca94d64e7ddfe9772c8d76f103cfb863
container_end_page 1731
container_issue 11
container_start_page 1721
container_title Canadian journal of fisheries and aquatic sciences
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creator Parzanini, Camilla
Arts, Michael T
Power, Michael
Rohtla, Mehis
Skiftesvik, Anne Berit
Koprivnikar, Janet
Browman, Howard I
Milotic, Dino
Durif, Caroline M.F
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.
doi_str_mv 10.1139/cjfas-2020-0432
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ispartof Canadian journal of fisheries and aquatic sciences, 2021-11, Vol.78 (11), p.1721-1731
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source Canadian Science Publishing (NRC Research Press) Current
subjects Anguilla anguilla
Biochemical composition
Brackish water
Carnivory
Chemical analysis
Composition
Eels
Fatty acids
Habitats
Isotope ratios
Isotopes
Life history
Lipids
Salinity
Salinity effects
Seawater
Stable isotopes
Water analysis
title Trophic ecology of the European eel (Anguilla anguilla) across different salinity habitats inferred from fatty acid and stable isotope analysis
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