Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers
To better understand the trophic role of ctenophores in Antarctica during austral fall and winter, a major species of cydippid ctenophore, Callianira antarctica, was collected during April/May (fall) and August/September (winter) 2002 in the vicinity of Marguerite Bay. Lipid content, lipid classes,...
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2004
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/846 https://doi.org/10.1007/s00300-004-0652-y |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1855 2023-07-30T03:57:18+02:00 Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers Ju, Se-Jong Scolardi, Kerri M. Daly, Kendra L. Harvey, H. R. 2004-11-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/846 https://doi.org/10.1007/s00300-004-0652-y unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/846 doi:10.1007/s00300-004-0652-y https://doi.org/10.1007/s00300-004-0652-y Marine Science Faculty Publications Lipid Class Fatty Alcohol Phosphatidyl Choline Potential Prey Syntactic Foam Life Sciences article 2004 ftusouthflorida https://doi.org/10.1007/s00300-004-0652-y 2023-07-13T20:46:05Z To better understand the trophic role of ctenophores in Antarctica during austral fall and winter, a major species of cydippid ctenophore, Callianira antarctica, was collected during April/May (fall) and August/September (winter) 2002 in the vicinity of Marguerite Bay. Lipid content, lipid classes, fatty acids, fatty alcohols and sterols were analyzed in animals, together with lipid biomarkers in krill and copepod species representing potential ctenophore prey. Lipid content in ctenophores collected in winter was slightly higher than from animals in fall (4.8 and 3.5% of dry weight, respectively). Polar lipids were the dominant lipid class in ctenophores, accounting for over half of the lipid content, with significant amounts of free fatty alcohols (more than 10% of total lipid content) detected. Lipid-class composition, however, differed significantly between seasons, with significant amounts of neutral lipid (wax esters and triacylglycerols) only detected in animals from fall. Although the dominant lipid classes in ctenophores varied between fall and winter, individual lipids (i.e., fatty acids, alcohols and sterols) showed only minor changes between seasons. Specifically, long-chain polyunsaturated fatty acids [20:5(n-3) and 22:6(n-3)] found in high abundance in larval krill were also elevated in ctenophores collected in winter. Very high amounts of monounsaturated fatty alcohols, particularly 20:1(n-9) and 22:1(n-11), known to be important components of wax esters in calanoid copepods, were also observed. Multivariate analysis using the suite of lipids found indicated that copepods are an important diet item for ctenophores in the study area. Results further suggest that C. antarctica feed actively year-round, with larval krill providing a food resource during austral winter. Article in Journal/Newspaper Antarc* Antarctic Antarctica Copepods University of South Florida St. Petersburg: Digital USFSP Antarctic Austral Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) The Antarctic Polar Biology 27 12 782 792 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Lipid Class Fatty Alcohol Phosphatidyl Choline Potential Prey Syntactic Foam Life Sciences |
spellingShingle |
Lipid Class Fatty Alcohol Phosphatidyl Choline Potential Prey Syntactic Foam Life Sciences Ju, Se-Jong Scolardi, Kerri M. Daly, Kendra L. Harvey, H. R. Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
topic_facet |
Lipid Class Fatty Alcohol Phosphatidyl Choline Potential Prey Syntactic Foam Life Sciences |
description |
To better understand the trophic role of ctenophores in Antarctica during austral fall and winter, a major species of cydippid ctenophore, Callianira antarctica, was collected during April/May (fall) and August/September (winter) 2002 in the vicinity of Marguerite Bay. Lipid content, lipid classes, fatty acids, fatty alcohols and sterols were analyzed in animals, together with lipid biomarkers in krill and copepod species representing potential ctenophore prey. Lipid content in ctenophores collected in winter was slightly higher than from animals in fall (4.8 and 3.5% of dry weight, respectively). Polar lipids were the dominant lipid class in ctenophores, accounting for over half of the lipid content, with significant amounts of free fatty alcohols (more than 10% of total lipid content) detected. Lipid-class composition, however, differed significantly between seasons, with significant amounts of neutral lipid (wax esters and triacylglycerols) only detected in animals from fall. Although the dominant lipid classes in ctenophores varied between fall and winter, individual lipids (i.e., fatty acids, alcohols and sterols) showed only minor changes between seasons. Specifically, long-chain polyunsaturated fatty acids [20:5(n-3) and 22:6(n-3)] found in high abundance in larval krill were also elevated in ctenophores collected in winter. Very high amounts of monounsaturated fatty alcohols, particularly 20:1(n-9) and 22:1(n-11), known to be important components of wax esters in calanoid copepods, were also observed. Multivariate analysis using the suite of lipids found indicated that copepods are an important diet item for ctenophores in the study area. Results further suggest that C. antarctica feed actively year-round, with larval krill providing a food resource during austral winter. |
format |
Article in Journal/Newspaper |
author |
Ju, Se-Jong Scolardi, Kerri M. Daly, Kendra L. Harvey, H. R. |
author_facet |
Ju, Se-Jong Scolardi, Kerri M. Daly, Kendra L. Harvey, H. R. |
author_sort |
Ju, Se-Jong |
title |
Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
title_short |
Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
title_full |
Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
title_fullStr |
Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
title_full_unstemmed |
Understanding the Trophic Role of the Antarctic Ctenophore, Callianira antarctica , using Lipid Biomarkers |
title_sort |
understanding the trophic role of the antarctic ctenophore, callianira antarctica , using lipid biomarkers |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2004 |
url |
https://digitalcommons.usf.edu/msc_facpub/846 https://doi.org/10.1007/s00300-004-0652-y |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) |
geographic |
Antarctic Austral Marguerite Marguerite Bay The Antarctic |
geographic_facet |
Antarctic Austral Marguerite Marguerite Bay The Antarctic |
genre |
Antarc* Antarctic Antarctica Copepods |
genre_facet |
Antarc* Antarctic Antarctica Copepods |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/846 doi:10.1007/s00300-004-0652-y https://doi.org/10.1007/s00300-004-0652-y |
op_doi |
https://doi.org/10.1007/s00300-004-0652-y |
container_title |
Polar Biology |
container_volume |
27 |
container_issue |
12 |
container_start_page |
782 |
op_container_end_page |
792 |
_version_ |
1772816734349164544 |