Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica
The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL)...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.707193 2024-09-15T17:41:56+00:00 Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica Meyer, Bettina Fuentes, Veronica Guerra, Citlali Schmidt, Katrin Atkinson, Angus Spahic, Susanne Cisewski, Boris Freier, Ulrich Olariaga, Alejandro Bathmann, Ulrich MEDIAN LATITUDE: -66.358543 * MEDIAN LONGITUDE: -0.843554 * SOUTH-BOUND LATITUDE: -69.621400 * WEST-BOUND LONGITUDE: -5.999600 * NORTH-BOUND LATITUDE: -63.452600 * EAST-BOUND LONGITUDE: 2.955400 * DATE/TIME START: 2004-04-07T22:04:00 * DATE/TIME END: 2006-08-02T15:00:00 2009 application/zip, 33 datasets https://doi.pangaea.de/10.1594/PANGAEA.707193 https://doi.org/10.1594/PANGAEA.707193 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.707193 https://doi.org/10.1594/PANGAEA.707193 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich (2009): Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica. Limnology and Oceanography, 54(5), https://doi.org/10.4319/lo.2009.54.5.1595 ANT-XXI/4 ANT-XXIII/6 AWI_BioOce Biological Oceanography @ AWI BONGO Bongo net DIVER Hand net HN Polarstern PS65 PS65/609-4 PS65/612-3 PS65/615-4 PS65/628-7 PS65/661-5 PS65/665-5 PS69 PS69/478-3 PS69/498-A PS69/498-B PS69/498-C PS69/515-A Sampling by diver dataset publication series 2009 ftpangaea https://doi.org/10.1594/PANGAEA.70719310.4319/lo.2009.54.5.1595 2024-07-24T02:31:42Z The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth rates of furcilia larvae in open water in autumn were similar to winter values under the ice (mean 0.008 mm/d), whereas autumn, under ice values were higher: 0.015 mm/d. Equivalent larval stages had up to 30% lower BL and 70% lower DM in winter compared to autumn, with mean oxygen consumption 44% lower (0.54 µl O2 DM/h). However, their ammonium excretion rates doubled (from 0.03-0.06 µg NH4 DM/h) so their mean O:N ratio was 46 in autumn and 15 in winter. Thus differing metabolic substrates were used between autumn and winter, suggesting a flexible overwintering strategy, as suggested for adults. The larvae were eating small copepods (Oithona spp.) and/or protozoans as well as autotrophic food under the ice. However, pelagic Chlorophyll a (Chl a) was a good predictor for growth in both seasons. The physics (current speed/ice topography) probably has a critical part to play in whether larval krill can exploit the food that may be associated with sea ice or be advected away from such suitable feeding habitat. Other/Unknown Material Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Lazarev Sea Sea ice Copepods PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-5.999600,2.955400,-63.452600,-69.621400) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXI/4 ANT-XXIII/6 AWI_BioOce Biological Oceanography @ AWI BONGO Bongo net DIVER Hand net HN Polarstern PS65 PS65/609-4 PS65/612-3 PS65/615-4 PS65/628-7 PS65/661-5 PS65/665-5 PS69 PS69/478-3 PS69/498-A PS69/498-B PS69/498-C PS69/515-A Sampling by diver |
spellingShingle |
ANT-XXI/4 ANT-XXIII/6 AWI_BioOce Biological Oceanography @ AWI BONGO Bongo net DIVER Hand net HN Polarstern PS65 PS65/609-4 PS65/612-3 PS65/615-4 PS65/628-7 PS65/661-5 PS65/665-5 PS69 PS69/478-3 PS69/498-A PS69/498-B PS69/498-C PS69/515-A Sampling by diver Meyer, Bettina Fuentes, Veronica Guerra, Citlali Schmidt, Katrin Atkinson, Angus Spahic, Susanne Cisewski, Boris Freier, Ulrich Olariaga, Alejandro Bathmann, Ulrich Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
topic_facet |
ANT-XXI/4 ANT-XXIII/6 AWI_BioOce Biological Oceanography @ AWI BONGO Bongo net DIVER Hand net HN Polarstern PS65 PS65/609-4 PS65/612-3 PS65/615-4 PS65/628-7 PS65/661-5 PS65/665-5 PS69 PS69/478-3 PS69/498-A PS69/498-B PS69/498-C PS69/515-A Sampling by diver |
description |
The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth rates of furcilia larvae in open water in autumn were similar to winter values under the ice (mean 0.008 mm/d), whereas autumn, under ice values were higher: 0.015 mm/d. Equivalent larval stages had up to 30% lower BL and 70% lower DM in winter compared to autumn, with mean oxygen consumption 44% lower (0.54 µl O2 DM/h). However, their ammonium excretion rates doubled (from 0.03-0.06 µg NH4 DM/h) so their mean O:N ratio was 46 in autumn and 15 in winter. Thus differing metabolic substrates were used between autumn and winter, suggesting a flexible overwintering strategy, as suggested for adults. The larvae were eating small copepods (Oithona spp.) and/or protozoans as well as autotrophic food under the ice. However, pelagic Chlorophyll a (Chl a) was a good predictor for growth in both seasons. The physics (current speed/ice topography) probably has a critical part to play in whether larval krill can exploit the food that may be associated with sea ice or be advected away from such suitable feeding habitat. |
format |
Other/Unknown Material |
author |
Meyer, Bettina Fuentes, Veronica Guerra, Citlali Schmidt, Katrin Atkinson, Angus Spahic, Susanne Cisewski, Boris Freier, Ulrich Olariaga, Alejandro Bathmann, Ulrich |
author_facet |
Meyer, Bettina Fuentes, Veronica Guerra, Citlali Schmidt, Katrin Atkinson, Angus Spahic, Susanne Cisewski, Boris Freier, Ulrich Olariaga, Alejandro Bathmann, Ulrich |
author_sort |
Meyer, Bettina |
title |
Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
title_short |
Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
title_full |
Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
title_fullStr |
Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
title_full_unstemmed |
Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica |
title_sort |
physiology, growth and development of larval krill ''euphausia superba'' in autumn and winter in the lazarev sea, antarctica |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.707193 https://doi.org/10.1594/PANGAEA.707193 |
op_coverage |
MEDIAN LATITUDE: -66.358543 * MEDIAN LONGITUDE: -0.843554 * SOUTH-BOUND LATITUDE: -69.621400 * WEST-BOUND LONGITUDE: -5.999600 * NORTH-BOUND LATITUDE: -63.452600 * EAST-BOUND LONGITUDE: 2.955400 * DATE/TIME START: 2004-04-07T22:04:00 * DATE/TIME END: 2006-08-02T15:00:00 |
long_lat |
ENVELOPE(-5.999600,2.955400,-63.452600,-69.621400) |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Lazarev Sea Sea ice Copepods |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Lazarev Sea Sea ice Copepods |
op_source |
Supplement to: Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich (2009): Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica. Limnology and Oceanography, 54(5), https://doi.org/10.4319/lo.2009.54.5.1595 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.707193 https://doi.org/10.1594/PANGAEA.707193 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.70719310.4319/lo.2009.54.5.1595 |
_version_ |
1810488224875806720 |