Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer
Biomass (as dry weight and protein content), gut fluorescence, electron transfer system (ETS) and aspartate transcarbamylase (ATC) activities were studied in different size fractions (200–500, 500–1000 μm and 1–14 mm) in the Bransfield Strait (Antarctic Peninsula) during January 1993. Very low value...
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ftunivlaspalmas:oai:https://accedacris.ulpgc.es:10553/47640 2023-05-15T14:00:50+02:00 Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer Hernandez-Leon, S. Almeida, C. Portillo-Hahnefeld, A. Gomez, M Montero, I. Gomez, May 6701465678 56819187800 6506791020 7401734371 36857196200 4759274 21675807 7168654 1273639 29397786 2000 http://hdl.handle.net/10553/47640 https://doi.org/10.1007/s00300000013 eng eng 0722-4060 Polar Biology 0722-4060 http://hdl.handle.net/10553/47640 doi:10.1007/s00300000013 0033815771 000089916500004 690 679 23 L-9561-2014 Polar Biology [ISSN 0722-4060], v. 23, p. 679-690 251001 Oceanografía biológica Biomass Size Size Fraction Antarctic Peninsula High Standard Deviation Austral Summer 2000 ftunivlaspalmas https://doi.org/10.1007/s00300000013 2020-01-29T00:08:00Z Biomass (as dry weight and protein content), gut fluorescence, electron transfer system (ETS) and aspartate transcarbamylase (ATC) activities were studied in different size fractions (200–500, 500–1000 μm and 1–14 mm) in the Bransfield Strait (Antarctic Peninsula) during January 1993. Very low values of zooplankton biomass were observed in all the size classes studied. About 56% of total biomass was due to the large size fraction (1–14 mm) while the smallest one (200–500 μm) accounted for about 26%. Gut fluorescence values increased in relation to the size class considered, as expected, being the differences from the smaller to the highest size fractions of orders of magnitude. Calculated ingestion rates showed that about 60–80% of total zooplankton ingestion (<14 mm) was due to the smaller organisms. Higher average values and higher variability of specific ETS activity was observed in the smaller size fraction while no differences between size classes were observed for the specific ATC activity. Biomass, gut fluorescence, ETS and ATC activities were not significantly different between the Bellingshausen and Weddell waters, although higher standard deviation was normally found at the former area. With the restrictions of using the above indices to estimate physiological rates, potential grazing of mesozooplankton (<14 mm) accounted for a rather low portion (<10%) of the primary production. The index of growth showed high values, suggesting no food limitation of mesozooplankton. Therefore, other processes such as predation should account for the very low biomass found and for the fate of a large portion of primary production. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Biology Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Antarctic Peninsula Austral Bransfield Strait Weddell |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Biomass Size Size Fraction Antarctic Peninsula High Standard Deviation Austral Summer |
spellingShingle |
251001 Oceanografía biológica Biomass Size Size Fraction Antarctic Peninsula High Standard Deviation Austral Summer Hernandez-Leon, S. Almeida, C. Portillo-Hahnefeld, A. Gomez, M Montero, I. Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
topic_facet |
251001 Oceanografía biológica Biomass Size Size Fraction Antarctic Peninsula High Standard Deviation Austral Summer |
description |
Biomass (as dry weight and protein content), gut fluorescence, electron transfer system (ETS) and aspartate transcarbamylase (ATC) activities were studied in different size fractions (200–500, 500–1000 μm and 1–14 mm) in the Bransfield Strait (Antarctic Peninsula) during January 1993. Very low values of zooplankton biomass were observed in all the size classes studied. About 56% of total biomass was due to the large size fraction (1–14 mm) while the smallest one (200–500 μm) accounted for about 26%. Gut fluorescence values increased in relation to the size class considered, as expected, being the differences from the smaller to the highest size fractions of orders of magnitude. Calculated ingestion rates showed that about 60–80% of total zooplankton ingestion (<14 mm) was due to the smaller organisms. Higher average values and higher variability of specific ETS activity was observed in the smaller size fraction while no differences between size classes were observed for the specific ATC activity. Biomass, gut fluorescence, ETS and ATC activities were not significantly different between the Bellingshausen and Weddell waters, although higher standard deviation was normally found at the former area. With the restrictions of using the above indices to estimate physiological rates, potential grazing of mesozooplankton (<14 mm) accounted for a rather low portion (<10%) of the primary production. The index of growth showed high values, suggesting no food limitation of mesozooplankton. Therefore, other processes such as predation should account for the very low biomass found and for the fate of a large portion of primary production. |
author2 |
Gomez, May 6701465678 56819187800 6506791020 7401734371 36857196200 4759274 21675807 7168654 1273639 29397786 |
author |
Hernandez-Leon, S. Almeida, C. Portillo-Hahnefeld, A. Gomez, M Montero, I. |
author_facet |
Hernandez-Leon, S. Almeida, C. Portillo-Hahnefeld, A. Gomez, M Montero, I. |
author_sort |
Hernandez-Leon, S. |
title |
Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
title_short |
Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
title_full |
Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
title_fullStr |
Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
title_full_unstemmed |
Biomass and potential feeding, respiration and growth of zooplankton in the Bransfield Strait (Antarctic Peninsula) during austral summer |
title_sort |
biomass and potential feeding, respiration and growth of zooplankton in the bransfield strait (antarctic peninsula) during austral summer |
publisher |
0722-4060 |
publishDate |
2000 |
url |
http://hdl.handle.net/10553/47640 https://doi.org/10.1007/s00300000013 |
geographic |
Antarctic Antarctic Peninsula Austral Bransfield Strait Weddell |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bransfield Strait Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Biology |
op_source |
Polar Biology [ISSN 0722-4060], v. 23, p. 679-690 |
op_relation |
Polar Biology 0722-4060 http://hdl.handle.net/10553/47640 doi:10.1007/s00300000013 0033815771 000089916500004 690 679 23 L-9561-2014 |
op_doi |
https://doi.org/10.1007/s00300000013 |
_version_ |
1766270181974212608 |