Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions
To examine the potential of lipids as dietary markers in Euphausia superba Dana, juvenile krill were fed 4 phytoplankton diets (diatoms, cryptomonads, dinoflagellates and thraustochytrids over a range of food concentrations) and 2 species of zooplankton (rotifers and Artemia sp.) for 20 d. Lipid con...
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ftinstitutrsn:oai:HAL:hal-03041400v1 2023-05-15T13:53:02+02:00 Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions Alonzo, F. Virtue, P. Nicol, S. Nichols, P.D. University of Tasmania Hobart, Australia (UTAS) Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy CSIRO Marine and Atmosphere Research Hobart Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) Institut de Radioprotection et de Sûreté Nucléaire (IRSN) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) 2005-07-01 https://hal.science/hal-03041400 https://doi.org/10.3354/meps296065 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps296065 hal-03041400 https://hal.science/hal-03041400 doi:10.3354/meps296065 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-03041400 Marine Ecology Progress Series, 2005, 296, pp.65-79. ⟨10.3354/meps296065⟩ biomarker fatty acid zooplankton algae Artemia Artemia sp Bacillariophyta Cryptophyta Dinophyceae Euphausia superba Euphausiacea Rotifera Thraustochytriidae [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2005 ftinstitutrsn https://doi.org/10.3354/meps296065 2023-03-07T23:38:53Z To examine the potential of lipids as dietary markers in Euphausia superba Dana, juvenile krill were fed 4 phytoplankton diets (diatoms, cryptomonads, dinoflagellates and thraustochytrids over a range of food concentrations) and 2 species of zooplankton (rotifers and Artemia sp.) for 20 d. Lipid content, lipid class and fatty acid (FA) composition were analysed for whole krill and digestive glands (DG). Changes detected in whole krill were almost entirely associated with the lipid variability observed in DG. With marked diet-induced changes, DG lipids were the major repository for the trophic signal in krill. DG lipid content increased in krill fed on phytoplankton due to the accumulation of polar lipid (0.5 mg per DG) and triacylglycerol (up to 1.7 mg per DG). Herbivorous diets induced distinct FA signatures in the DG, characterised by higher proportions of: 16:1ω7 and 20:5ω3 in diatom-fed krill; 18:1ω9 and 18:4ω3 in cryptomonad-fed krill; 18:1ω9, 18:4ω3+18:5ω3 and 22:6ω3 in dinoflagellate-fed krill; and 14:0 and 22:6ω3 in thraustochytrid-fed krill. Dietary FA markers increased in relative proportion (% total FA) in the DG with increasing concentration of each particular food. Krill fed rotifers or Artemia sp. showed relatively low DG lipid content, with only slightly higher proportions of 18:2ω6 than observed with phytoplankton diets. Zooplankton diets induced no significant difference in FA composition in relation to the species of zooplankton used as prey or to the algal type consumed by these prey. © Inter-Research 2005. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba IRSN (Institut de Radioprotection et de Sûreté Nucléaire): Publications (HAL Antarctic Marine Ecology Progress Series 296 65 79 |
institution |
Open Polar |
collection |
IRSN (Institut de Radioprotection et de Sûreté Nucléaire): Publications (HAL |
op_collection_id |
ftinstitutrsn |
language |
English |
topic |
biomarker fatty acid zooplankton algae Artemia Artemia sp Bacillariophyta Cryptophyta Dinophyceae Euphausia superba Euphausiacea Rotifera Thraustochytriidae [SDV]Life Sciences [q-bio] |
spellingShingle |
biomarker fatty acid zooplankton algae Artemia Artemia sp Bacillariophyta Cryptophyta Dinophyceae Euphausia superba Euphausiacea Rotifera Thraustochytriidae [SDV]Life Sciences [q-bio] Alonzo, F. Virtue, P. Nicol, S. Nichols, P.D. Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
topic_facet |
biomarker fatty acid zooplankton algae Artemia Artemia sp Bacillariophyta Cryptophyta Dinophyceae Euphausia superba Euphausiacea Rotifera Thraustochytriidae [SDV]Life Sciences [q-bio] |
description |
To examine the potential of lipids as dietary markers in Euphausia superba Dana, juvenile krill were fed 4 phytoplankton diets (diatoms, cryptomonads, dinoflagellates and thraustochytrids over a range of food concentrations) and 2 species of zooplankton (rotifers and Artemia sp.) for 20 d. Lipid content, lipid class and fatty acid (FA) composition were analysed for whole krill and digestive glands (DG). Changes detected in whole krill were almost entirely associated with the lipid variability observed in DG. With marked diet-induced changes, DG lipids were the major repository for the trophic signal in krill. DG lipid content increased in krill fed on phytoplankton due to the accumulation of polar lipid (0.5 mg per DG) and triacylglycerol (up to 1.7 mg per DG). Herbivorous diets induced distinct FA signatures in the DG, characterised by higher proportions of: 16:1ω7 and 20:5ω3 in diatom-fed krill; 18:1ω9 and 18:4ω3 in cryptomonad-fed krill; 18:1ω9, 18:4ω3+18:5ω3 and 22:6ω3 in dinoflagellate-fed krill; and 14:0 and 22:6ω3 in thraustochytrid-fed krill. Dietary FA markers increased in relative proportion (% total FA) in the DG with increasing concentration of each particular food. Krill fed rotifers or Artemia sp. showed relatively low DG lipid content, with only slightly higher proportions of 18:2ω6 than observed with phytoplankton diets. Zooplankton diets induced no significant difference in FA composition in relation to the species of zooplankton used as prey or to the algal type consumed by these prey. © Inter-Research 2005. |
author2 |
University of Tasmania Hobart, Australia (UTAS) Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy CSIRO Marine and Atmosphere Research Hobart Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) Institut de Radioprotection et de Sûreté Nucléaire (IRSN) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) |
format |
Article in Journal/Newspaper |
author |
Alonzo, F. Virtue, P. Nicol, S. Nichols, P.D. |
author_facet |
Alonzo, F. Virtue, P. Nicol, S. Nichols, P.D. |
author_sort |
Alonzo, F. |
title |
Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
title_short |
Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
title_full |
Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
title_fullStr |
Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
title_full_unstemmed |
Lipids as trophic markers in Antarctic krill. II. Lipid composition of the body and digestive gland of Euphausia superba in controlled conditions |
title_sort |
lipids as trophic markers in antarctic krill. ii. lipid composition of the body and digestive gland of euphausia superba in controlled conditions |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-03041400 https://doi.org/10.3354/meps296065 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-03041400 Marine Ecology Progress Series, 2005, 296, pp.65-79. ⟨10.3354/meps296065⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps296065 hal-03041400 https://hal.science/hal-03041400 doi:10.3354/meps296065 |
op_doi |
https://doi.org/10.3354/meps296065 |
container_title |
Marine Ecology Progress Series |
container_volume |
296 |
container_start_page |
65 |
op_container_end_page |
79 |
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1766257982848368640 |