Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea
We investigated physiological parameters (elemental and biochemical composition, metabolic rates, feeding activity and growth) of adult Antarctic krill in the Lazarev Sea in late spring (December), mid autumn (April) and mid winter (July and August) to evaluate proposed hypotheses of overwintering m...
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ftjamescook:oai:researchonline.jcu.edu.au:15070 2024-02-11T09:56:47+01:00 Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea Meyer, Bettina Auerswald, Lutz Siegel, Volker Spahić, Susanne Pape, Carsten Fach, Bettina A. Teschke, Mathias Lopata, Andreas L. Fuentes, Veronica 2010 application/pdf https://researchonline.jcu.edu.au/15070/1/15070_Meyer_et_al_2010.pdf unknown Inter-Research http://dx.doi.org/10.3354/meps08371 https://researchonline.jcu.edu.au/15070/ https://researchonline.jcu.edu.au/15070/1/15070_Meyer_et_al_2010.pdf Meyer, Bettina, Auerswald, Lutz, Siegel, Volker, Spahić, Susanne, Pape, Carsten, Fach, Bettina A., Teschke, Mathias, Lopata, Andreas L., and Fuentes, Veronica (2010) Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea. Marine Ecology Progress Series, 398 (1). pp. 1-18. open Article PeerReviewed 2010 ftjamescook https://doi.org/10.3354/meps08371 2024-01-22T23:26:27Z We investigated physiological parameters (elemental and biochemical composition, metabolic rates, feeding activity and growth) of adult Antarctic krill in the Lazarev Sea in late spring (December), mid autumn (April) and mid winter (July and August) to evaluate proposed hypotheses of overwintering mechanisms. Our major observations are: (1) respiration rates were reduced by 30 to 50% in autumn and winter, compared to values in late spring; (2) feeding activity was reduced by 80 to 86% in autumn and winter, compared to late spring, at similar food concentrations; (3) feeding was omnivorous during winter; (4) with each moult, krill grew by 0.5 to 3.8% in length; (5) body lipids and, to a small extent, body proteins were consumed during winter. Adult Euphausia superba thus adopt metabolic slowdown and omnivorous feeding activity at low rates to survive the winter season in the Lazarev Sea. By mid autumn, metabolic activity is reduced, most likely being influenced by the Antarctic light regime, which is accompanied by a reduction in feeding activity and growth. Although at a low level, the feeding activity during winter seems to provide an important energy input. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea James Cook University, Australia: ResearchOnline@JCU Antarctic Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) The Antarctic Marine Ecology Progress Series 398 1 18 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
We investigated physiological parameters (elemental and biochemical composition, metabolic rates, feeding activity and growth) of adult Antarctic krill in the Lazarev Sea in late spring (December), mid autumn (April) and mid winter (July and August) to evaluate proposed hypotheses of overwintering mechanisms. Our major observations are: (1) respiration rates were reduced by 30 to 50% in autumn and winter, compared to values in late spring; (2) feeding activity was reduced by 80 to 86% in autumn and winter, compared to late spring, at similar food concentrations; (3) feeding was omnivorous during winter; (4) with each moult, krill grew by 0.5 to 3.8% in length; (5) body lipids and, to a small extent, body proteins were consumed during winter. Adult Euphausia superba thus adopt metabolic slowdown and omnivorous feeding activity at low rates to survive the winter season in the Lazarev Sea. By mid autumn, metabolic activity is reduced, most likely being influenced by the Antarctic light regime, which is accompanied by a reduction in feeding activity and growth. Although at a low level, the feeding activity during winter seems to provide an important energy input. |
format |
Article in Journal/Newspaper |
author |
Meyer, Bettina Auerswald, Lutz Siegel, Volker Spahić, Susanne Pape, Carsten Fach, Bettina A. Teschke, Mathias Lopata, Andreas L. Fuentes, Veronica |
spellingShingle |
Meyer, Bettina Auerswald, Lutz Siegel, Volker Spahić, Susanne Pape, Carsten Fach, Bettina A. Teschke, Mathias Lopata, Andreas L. Fuentes, Veronica Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
author_facet |
Meyer, Bettina Auerswald, Lutz Siegel, Volker Spahić, Susanne Pape, Carsten Fach, Bettina A. Teschke, Mathias Lopata, Andreas L. Fuentes, Veronica |
author_sort |
Meyer, Bettina |
title |
Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
title_short |
Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
title_full |
Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
title_fullStr |
Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
title_full_unstemmed |
Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea |
title_sort |
seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill euphausia superba in the lazarev sea |
publisher |
Inter-Research |
publishDate |
2010 |
url |
https://researchonline.jcu.edu.au/15070/1/15070_Meyer_et_al_2010.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 The Antarctic |
geographic_facet |
Antarctic Lazarev Lazarev Sea The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea |
op_relation |
http://dx.doi.org/10.3354/meps08371 https://researchonline.jcu.edu.au/15070/ https://researchonline.jcu.edu.au/15070/1/15070_Meyer_et_al_2010.pdf Meyer, Bettina, Auerswald, Lutz, Siegel, Volker, Spahić, Susanne, Pape, Carsten, Fach, Bettina A., Teschke, Mathias, Lopata, Andreas L., and Fuentes, Veronica (2010) Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea. Marine Ecology Progress Series, 398 (1). pp. 1-18. |
op_rights |
open |
op_doi |
https://doi.org/10.3354/meps08371 |
container_title |
Marine Ecology Progress Series |
container_volume |
398 |
container_start_page |
1 |
op_container_end_page |
18 |
_version_ |
1790605839144321024 |