Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry
Zooplankton growth rates are hard to measure directly, and proxy measurements are desirable to encompass the variety of species and scales of interest. The growth rate hypothesis of stoichiometric theory states that a negative relationship exists between nitrogen: phosphorus (N: P) stoichiometry and...
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AMER SOC LIMNOLOGY OCEANOGRAPHY
2004
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ftnerc:oai:nora.nerc.ac.uk:10193 2023-05-15T13:45:10+02:00 Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry Arnold, K.H. Shreeve, R.S. Atkinson, A. Clarke, A. 2004 http://nora.nerc.ac.uk/id/eprint/10193/ unknown AMER SOC LIMNOLOGY OCEANOGRAPHY Arnold, K.H.; Shreeve, R.S.; Atkinson, A.; Clarke, A. orcid:0000-0002-7582-3074 . 2004 Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry. Limnology and Oceanography, 49 (6). 2152-2161. Marine Sciences Biology and Microbiology Ecology and Environment Publication - Article PeerReviewed 2004 ftnerc 2023-02-04T19:26:36Z Zooplankton growth rates are hard to measure directly, and proxy measurements are desirable to encompass the variety of species and scales of interest. The growth rate hypothesis of stoichiometric theory states that a negative relationship exists between nitrogen: phosphorus (N: P) stoichiometry and growth rate, driven by cellular ribosomal ribonucleic acid (rRNA) content. Despite the wealth of literature on the growth rate hypothesis, there exist no practical demonstrations of its use in the marine literature. We thus investigated whether this hypothesis could be the basis of a technique to estimate growth rates of Euphausia superba by comparing, for the same individual krill, elemental stoichiometry and growth rates derived from the instantaneous growth rate (IGR) method. These growth rates were the first IGR measurements from South Georgia; from within a restricted area over the course of just 1 month, these rates were highly variable, from negative to near maximum rates recorded for the species. Although there were significant differences in N: P ratio and phosphorus content between individuals and schools, there was no relationship between N: P ratio and growth rate when data were grouped by school. Thus, our data do not support the predictions of the growth rate hypothesis at an intraspecific scale. However, when all data were pooled, the mean values of growth rate and N: P ratio did fit the interspecific relationship established previously for freshwater zooplankton. We suggest that krill maintain the biochemical machinery for high growth potential and maintain high growth in summer to take advantage of short-term fluctuations in food. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Natural Environment Research Council: NERC Open Research Archive Antarctic |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Biology and Microbiology Ecology and Environment |
spellingShingle |
Marine Sciences Biology and Microbiology Ecology and Environment Arnold, K.H. Shreeve, R.S. Atkinson, A. Clarke, A. Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
topic_facet |
Marine Sciences Biology and Microbiology Ecology and Environment |
description |
Zooplankton growth rates are hard to measure directly, and proxy measurements are desirable to encompass the variety of species and scales of interest. The growth rate hypothesis of stoichiometric theory states that a negative relationship exists between nitrogen: phosphorus (N: P) stoichiometry and growth rate, driven by cellular ribosomal ribonucleic acid (rRNA) content. Despite the wealth of literature on the growth rate hypothesis, there exist no practical demonstrations of its use in the marine literature. We thus investigated whether this hypothesis could be the basis of a technique to estimate growth rates of Euphausia superba by comparing, for the same individual krill, elemental stoichiometry and growth rates derived from the instantaneous growth rate (IGR) method. These growth rates were the first IGR measurements from South Georgia; from within a restricted area over the course of just 1 month, these rates were highly variable, from negative to near maximum rates recorded for the species. Although there were significant differences in N: P ratio and phosphorus content between individuals and schools, there was no relationship between N: P ratio and growth rate when data were grouped by school. Thus, our data do not support the predictions of the growth rate hypothesis at an intraspecific scale. However, when all data were pooled, the mean values of growth rate and N: P ratio did fit the interspecific relationship established previously for freshwater zooplankton. We suggest that krill maintain the biochemical machinery for high growth potential and maintain high growth in summer to take advantage of short-term fluctuations in food. |
format |
Article in Journal/Newspaper |
author |
Arnold, K.H. Shreeve, R.S. Atkinson, A. Clarke, A. |
author_facet |
Arnold, K.H. Shreeve, R.S. Atkinson, A. Clarke, A. |
author_sort |
Arnold, K.H. |
title |
Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
title_short |
Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
title_full |
Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
title_fullStr |
Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
title_full_unstemmed |
Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
title_sort |
growth rates of antarctic krill, euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry |
publisher |
AMER SOC LIMNOLOGY OCEANOGRAPHY |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/10193/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
Arnold, K.H.; Shreeve, R.S.; Atkinson, A.; Clarke, A. orcid:0000-0002-7582-3074 . 2004 Growth rates of Antarctic krill, Euphausia superba: comparison of the instantaneous growth rate method with nitrogen and phosphorus stoichiometry. Limnology and Oceanography, 49 (6). 2152-2161. |
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1766214043572371456 |