Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod
To determine whether fatty acid (FA) profiles are a useful biomarker to trace the flow of material in a coastal food web, we fed the sandhopper Bellor - chestia quoyana specific seaweed diets, each with a contrasting FA profile including Durvillaea antarctica (Phaeophyta), Ecklonia radiata (Phaeophy...
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Edith Cowan University, Research Online, Perth, Western Australia
2013
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ftedithcowan:oai:ro.ecu.edu.au:ecuworks2013-1818 2023-05-15T13:32:23+02:00 Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod McLeod, Rebecca Hyndes, Glenn A Hurd, Catriona Frew, Russell 2013-01-01T08:00:00Z https://ro.ecu.edu.au/ecuworks2013/818 https://doi.org/10.3354/meps10327 unknown Edith Cowan University, Research Online, Perth, Western Australia https://ro.ecu.edu.au/ecuworks2013/818 http://dx.doi.org/10.3354/meps10327 Research outputs 2013 13C tracer Biomarker Compoundspecific stable isotopes Food web GC-IRMS Invertebrate Seaweed Stable isotopesamphipod biochemical composition diet fatty acid feeding behavior gas chromatography stable isotope tracer turnover Amphipoda Chlorophyta Durvillaea antarctica Ecklonia Ecklonia radiata Invertebrata Phaeophyceae Ulva Aquaculture and Fisheries text 2013 ftedithcowan https://doi.org/10.3354/meps10327 2022-02-06T22:05:15Z To determine whether fatty acid (FA) profiles are a useful biomarker to trace the flow of material in a coastal food web, we fed the sandhopper Bellor - chestia quoyana specific seaweed diets, each with a contrasting FA profile including Durvillaea antarctica (Phaeophyta), Ecklonia radiata (Phaeophyta) or Ulva sp. (Chlorophyta). We then compared changes in FA composition in relation to diet for this sandhopper. After 12 d, sandhoppers from each treatment had distinct FA profiles, particularly with respect to polyunsaturated FAs (PUFAs); however, increases in specific FAs did not relate to those FAs that were abundant in their diet. For example, sandhoppers fed PUFA-deficient Ulva sp. exhibited a relative increase in PUFAs. The E. radiata and Ulva sp. diets both caused significant shifts in sandhopper FA composition over the course of the experiment. In order to follow the assimilation of carbon and FAs, sandhoppers were fed natural or 13C-enhanced E. radiata or Ulva sp., and changes to the δ13C of individual FAs were measured over time. Turnover of the most abundant FAs, 16:0 and 18:1ω9, was higher for sandhoppers fed E. radiata than for those fed Ulva sp. Comparisons between bulk tissue δ13C and δ13C of individual FAs were consistent with sandhoppers modifying the turnover rate of FA in response to diet. These findings suggest that there is no consistent relationship between the FA compositions of green and brown seaweeds and that of the sandhopper B. quoyana. We caution that community-level application of FAs as a dietary biomarker tool must be accompanied by controlled experiments incorporating key species of relevance. Text Antarc* Antarctica Edith Cowan University (ECU, Australia): Research Online Marine Ecology Progress Series 479 1 12 |
institution |
Open Polar |
collection |
Edith Cowan University (ECU, Australia): Research Online |
op_collection_id |
ftedithcowan |
language |
unknown |
topic |
13C tracer Biomarker Compoundspecific stable isotopes Food web GC-IRMS Invertebrate Seaweed Stable isotopesamphipod biochemical composition diet fatty acid feeding behavior gas chromatography stable isotope tracer turnover Amphipoda Chlorophyta Durvillaea antarctica Ecklonia Ecklonia radiata Invertebrata Phaeophyceae Ulva Aquaculture and Fisheries |
spellingShingle |
13C tracer Biomarker Compoundspecific stable isotopes Food web GC-IRMS Invertebrate Seaweed Stable isotopesamphipod biochemical composition diet fatty acid feeding behavior gas chromatography stable isotope tracer turnover Amphipoda Chlorophyta Durvillaea antarctica Ecklonia Ecklonia radiata Invertebrata Phaeophyceae Ulva Aquaculture and Fisheries McLeod, Rebecca Hyndes, Glenn A Hurd, Catriona Frew, Russell Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
topic_facet |
13C tracer Biomarker Compoundspecific stable isotopes Food web GC-IRMS Invertebrate Seaweed Stable isotopesamphipod biochemical composition diet fatty acid feeding behavior gas chromatography stable isotope tracer turnover Amphipoda Chlorophyta Durvillaea antarctica Ecklonia Ecklonia radiata Invertebrata Phaeophyceae Ulva Aquaculture and Fisheries |
description |
To determine whether fatty acid (FA) profiles are a useful biomarker to trace the flow of material in a coastal food web, we fed the sandhopper Bellor - chestia quoyana specific seaweed diets, each with a contrasting FA profile including Durvillaea antarctica (Phaeophyta), Ecklonia radiata (Phaeophyta) or Ulva sp. (Chlorophyta). We then compared changes in FA composition in relation to diet for this sandhopper. After 12 d, sandhoppers from each treatment had distinct FA profiles, particularly with respect to polyunsaturated FAs (PUFAs); however, increases in specific FAs did not relate to those FAs that were abundant in their diet. For example, sandhoppers fed PUFA-deficient Ulva sp. exhibited a relative increase in PUFAs. The E. radiata and Ulva sp. diets both caused significant shifts in sandhopper FA composition over the course of the experiment. In order to follow the assimilation of carbon and FAs, sandhoppers were fed natural or 13C-enhanced E. radiata or Ulva sp., and changes to the δ13C of individual FAs were measured over time. Turnover of the most abundant FAs, 16:0 and 18:1ω9, was higher for sandhoppers fed E. radiata than for those fed Ulva sp. Comparisons between bulk tissue δ13C and δ13C of individual FAs were consistent with sandhoppers modifying the turnover rate of FA in response to diet. These findings suggest that there is no consistent relationship between the FA compositions of green and brown seaweeds and that of the sandhopper B. quoyana. We caution that community-level application of FAs as a dietary biomarker tool must be accompanied by controlled experiments incorporating key species of relevance. |
format |
Text |
author |
McLeod, Rebecca Hyndes, Glenn A Hurd, Catriona Frew, Russell |
author_facet |
McLeod, Rebecca Hyndes, Glenn A Hurd, Catriona Frew, Russell |
author_sort |
McLeod, Rebecca |
title |
Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
title_short |
Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
title_full |
Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
title_fullStr |
Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
title_full_unstemmed |
Unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
title_sort |
unexpected shifts in fatty acid composition in response to diet in a common littoral amphipod |
publisher |
Edith Cowan University, Research Online, Perth, Western Australia |
publishDate |
2013 |
url |
https://ro.ecu.edu.au/ecuworks2013/818 https://doi.org/10.3354/meps10327 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Research outputs 2013 |
op_relation |
https://ro.ecu.edu.au/ecuworks2013/818 http://dx.doi.org/10.3354/meps10327 |
op_doi |
https://doi.org/10.3354/meps10327 |
container_title |
Marine Ecology Progress Series |
container_volume |
479 |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1766026267553955840 |