� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae
Physiological condition and feeding behavior of furcilia larvae were investigated in autumn (April 1999) in the southwestern Lazarev Sea prior to the critical overwintering period. Furcilia stage III (FIII) larvae were most abundant, so only these were used for all analyses (dry mass [DM], elemental...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.318.1398 2023-05-15T14:00:08+02:00 � 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae B. Meyer A. Atkinson D. Stübing B. Oettl W. Hagen U. V. Bathmann The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.1398 http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.1398 http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf text ftciteseerx 2016-09-04T00:11:18Z Physiological condition and feeding behavior of furcilia larvae were investigated in autumn (April 1999) in the southwestern Lazarev Sea prior to the critical overwintering period. Furcilia stage III (FIII) larvae were most abundant, so only these were used for all analyses (dry mass [DM], elemental and biochemical composition, gut content) and experiments (metabolic and ingestion rates, selective feeding behavior). Chlorophyll a (Chl a) concentrations in the mixed layer were �0.1 �g L�1. Respiration rates of freshly caught FIII larvae were between 0.4 and 1.2 �l O2 mg�1 DM h�1, similar to larvae fed for 7donhigh food concentrations (4 �g Chl a L�1). Excretion rates ranged between 0.01 and 0.02 �g NH4mg�1 DM h�1. Their atomic O: N ratio of 72 indicated that lipids were the main metabolic substrate of FIII larvae in the field. The daily C ration ranged from 0.4 % at the lowest food concentration of 3 �g CL�1 to 28 % at the highest enriched food concentration of 216 �g CL�1, whereas clearance rates decreased with increasing food concentrations. In natural seawater, 115 ml mg�1 Ch�1, and in natural seawater enriched with ice biota, 24 ml mg�1 Ch�1, the clearance rates on specific phytoplankton taxa revealed no significant difference across a food size range of 12–220 �m. The study suggests that during periods of low food supply in the water column, larvae have to exploit ice biota to cover their metabolic demands. Antarctic krill (Euphausia superba, hereafter ‘‘krill’’) is a Text Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea Unknown Antarctic Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Physiological condition and feeding behavior of furcilia larvae were investigated in autumn (April 1999) in the southwestern Lazarev Sea prior to the critical overwintering period. Furcilia stage III (FIII) larvae were most abundant, so only these were used for all analyses (dry mass [DM], elemental and biochemical composition, gut content) and experiments (metabolic and ingestion rates, selective feeding behavior). Chlorophyll a (Chl a) concentrations in the mixed layer were �0.1 �g L�1. Respiration rates of freshly caught FIII larvae were between 0.4 and 1.2 �l O2 mg�1 DM h�1, similar to larvae fed for 7donhigh food concentrations (4 �g Chl a L�1). Excretion rates ranged between 0.01 and 0.02 �g NH4mg�1 DM h�1. Their atomic O: N ratio of 72 indicated that lipids were the main metabolic substrate of FIII larvae in the field. The daily C ration ranged from 0.4 % at the lowest food concentration of 3 �g CL�1 to 28 % at the highest enriched food concentration of 216 �g CL�1, whereas clearance rates decreased with increasing food concentrations. In natural seawater, 115 ml mg�1 Ch�1, and in natural seawater enriched with ice biota, 24 ml mg�1 Ch�1, the clearance rates on specific phytoplankton taxa revealed no significant difference across a food size range of 12–220 �m. The study suggests that during periods of low food supply in the water column, larvae have to exploit ice biota to cover their metabolic demands. Antarctic krill (Euphausia superba, hereafter ‘‘krill’’) is a |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
B. Meyer A. Atkinson D. Stübing B. Oettl W. Hagen U. V. Bathmann |
spellingShingle |
B. Meyer A. Atkinson D. Stübing B. Oettl W. Hagen U. V. Bathmann � 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
author_facet |
B. Meyer A. Atkinson D. Stübing B. Oettl W. Hagen U. V. Bathmann |
author_sort |
B. Meyer |
title |
� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
title_short |
� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
title_full |
� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
title_fullStr |
� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
title_full_unstemmed |
� 2002, by the American Society of Limnology and Oceanography, Inc. Feeding and energy budgets of Antarctic krill Euphausia superba at the onset of winter—I. Furcilia III larvae |
title_sort |
� 2002, by the american society of limnology and oceanography, inc. feeding and energy budgets of antarctic krill euphausia superba at the onset of winter—i. furcilia iii larvae |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.1398 http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) |
geographic |
Antarctic Lazarev Lazarev Sea |
geographic_facet |
Antarctic Lazarev Lazarev Sea |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea |
op_source |
http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.1398 http://new.aslo.org/lo/toc/vol_47/issue_4/0943.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766269127239925760 |