Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean
The lipid and hydrocarbon composition of two species of Antarctic copepod, Rhincalanus gigas and Calanus simillimus, was investigated at two contrasting sites. Differences in the quantity of total lipid between sites were pronounced for R.gigas; females from a station near South Georgia where a bloo...
Published in: | Journal of Plankton Research |
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Oxford University Press
1996
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Online Access: | http://nora.nerc.ac.uk/id/eprint/515352/ https://doi.org/10.1093/plankt/18.8.1439 |
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ftnerc:oai:nora.nerc.ac.uk:515352 2023-05-15T13:49:33+02:00 Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean Ward, Peter Shreeve, Rachael S. Cripps, G.C. 1996 http://nora.nerc.ac.uk/id/eprint/515352/ https://doi.org/10.1093/plankt/18.8.1439 unknown Oxford University Press Ward, Peter; Shreeve, Rachael S.; Cripps, G.C. 1996 Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean. Journal of Plankton Research, 18 (8). 1439-1454. https://doi.org/10.1093/plankt/18.8.1439 <https://doi.org/10.1093/plankt/18.8.1439> Publication - Article PeerReviewed 1996 ftnerc https://doi.org/10.1093/plankt/18.8.1439 2023-02-04T19:43:58Z The lipid and hydrocarbon composition of two species of Antarctic copepod, Rhincalanus gigas and Calanus simillimus, was investigated at two contrasting sites. Differences in the quantity of total lipid between sites were pronounced for R.gigas; females from a station near South Georgia where a bloom was in progress contained -8 times as much as those sampled in post-bloom waters in the Polar Frontal Zone (PFZ) some 450 km further north. In contrast, differences between sites for C.simillimus were less pronounced. The main lipid class for R.gigas was wax ester and for C.simillimus triacylglycerol. This fundamental difference is thought to reflect varying life-history patterns suggesting that C.simillimus may not undergo periods of pronounced food shortage. Pristane, a metabolite of phytol derived through the degradation of chlorophyll, was present in both species at both sites, indicating recent feeding activity, but the lack of the polyene diatom marker C21.6 in C.simillimus at the PFZ station suggested that it was largely feeding on other microp1ankton. Fatty acid analysis of C.simillimus offered further evidence that this species was omnivorous and that R.gigas was predominantly herbivorous 16:0 and 16:l generally accounted for slightly >50% of total fatty acids in both species; however, 16:0 was proportionately more abundant in C.simillimus and 16:l in R.gigas. The 16:1/16:0 ratio is usually >1 in diatoms, suggesting that the diet of C.simillimus contained items of prey other than diatoms, a fact confirmed in grazing experiments. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Journal of Plankton Research 18 8 1439 1454 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The lipid and hydrocarbon composition of two species of Antarctic copepod, Rhincalanus gigas and Calanus simillimus, was investigated at two contrasting sites. Differences in the quantity of total lipid between sites were pronounced for R.gigas; females from a station near South Georgia where a bloom was in progress contained -8 times as much as those sampled in post-bloom waters in the Polar Frontal Zone (PFZ) some 450 km further north. In contrast, differences between sites for C.simillimus were less pronounced. The main lipid class for R.gigas was wax ester and for C.simillimus triacylglycerol. This fundamental difference is thought to reflect varying life-history patterns suggesting that C.simillimus may not undergo periods of pronounced food shortage. Pristane, a metabolite of phytol derived through the degradation of chlorophyll, was present in both species at both sites, indicating recent feeding activity, but the lack of the polyene diatom marker C21.6 in C.simillimus at the PFZ station suggested that it was largely feeding on other microp1ankton. Fatty acid analysis of C.simillimus offered further evidence that this species was omnivorous and that R.gigas was predominantly herbivorous 16:0 and 16:l generally accounted for slightly >50% of total fatty acids in both species; however, 16:0 was proportionately more abundant in C.simillimus and 16:l in R.gigas. The 16:1/16:0 ratio is usually >1 in diatoms, suggesting that the diet of C.simillimus contained items of prey other than diatoms, a fact confirmed in grazing experiments. |
format |
Article in Journal/Newspaper |
author |
Ward, Peter Shreeve, Rachael S. Cripps, G.C. |
spellingShingle |
Ward, Peter Shreeve, Rachael S. Cripps, G.C. Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
author_facet |
Ward, Peter Shreeve, Rachael S. Cripps, G.C. |
author_sort |
Ward, Peter |
title |
Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
title_short |
Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
title_full |
Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
title_fullStr |
Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
title_full_unstemmed |
Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean |
title_sort |
rhincalanus gigas and calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the southern ocean |
publisher |
Oxford University Press |
publishDate |
1996 |
url |
http://nora.nerc.ac.uk/id/eprint/515352/ https://doi.org/10.1093/plankt/18.8.1439 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
Ward, Peter; Shreeve, Rachael S.; Cripps, G.C. 1996 Rhincalanus gigas and Calanus simillimus: lipid storage patterns of two species of copepod in the seasonally ice-free zone of the Southern Ocean. Journal of Plankton Research, 18 (8). 1439-1454. https://doi.org/10.1093/plankt/18.8.1439 <https://doi.org/10.1093/plankt/18.8.1439> |
op_doi |
https://doi.org/10.1093/plankt/18.8.1439 |
container_title |
Journal of Plankton Research |
container_volume |
18 |
container_issue |
8 |
container_start_page |
1439 |
op_container_end_page |
1454 |
_version_ |
1766251602042159104 |