Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season
Oxygen comsumption rates were determined on 21 species of crustaceans typical of the Southern Ocean micronektonic crustacean assemblage during spring (November), fall (March), and winter (June-August). Specimens were collected in the Scotia-Weddell Sea region in the vicinity of 60-degrees-S, 40-degr...
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Digital Commons @ University of South Florida
1994
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1030 2023-07-30T03:57:23+02:00 Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season Torres, Joseph J. Aarset, A. V. Donnelly, J. Hopkins, Thomas L. Lancraft, T. M. Ainley, D. G. 1994-10-27T07:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/31 https://digitalcommons.usf.edu/context/msc_facpub/article/1030/viewcontent/hopkins.113.207_219.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/31 https://digitalcommons.usf.edu/context/msc_facpub/article/1030/viewcontent/hopkins.113.207_219.pdf http://creativecommons.org/licenses/by/3.0/ Marine Science Faculty Publications Metabolism Antarctic Pelagic Crustacea Overwinter Life Sciences Marine Biology article 1994 ftusouthflorida 2023-07-13T20:21:41Z Oxygen comsumption rates were determined on 21 species of crustaceans typical of the Southern Ocean micronektonic crustacean assemblage during spring (November), fall (March), and winter (June-August). Specimens were collected in the Scotia-Weddell Sea region in the vicinity of 60-degrees-S, 40-degrees-W in the upper 1000 m of the water column. Respiration (y, mul O2mg-1 wet mass h-1) declined with depth of occurrence (x, m) according to the equation y = 0.125 x-0.172 +/- 0.052 (p < 0.05) despite the isothermal character of the water column, suggesting that lower metabolic rates are a temperature-independent adaptation to life in the deep sea. Three species of Crustacea showed a lowered metabolism during the winter season: the krill Euphausia superba and the 2 hyperiid amphipods Cyllopus lucasii and Vibilia stebbingi. Critical oxygen partial pressure (Pc) varied between 29 and 52 mm Hg, well below the lowest PO2 found in the water column. It is suggested that the long nights of the Antarctic winter decrease the effectiveness of visual predation in the epipelagic zone, allowing lowered metabolic rates to be a viable overwintering strategy for some species. Article in Journal/Newspaper Antarc* Antarctic Euphausia superba Southern Ocean Weddell Sea University of South Florida St. Petersburg: Digital USFSP Antarctic Southern Ocean The Antarctic Weddell Weddell Sea |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Metabolism Antarctic Pelagic Crustacea Overwinter Life Sciences Marine Biology |
spellingShingle |
Metabolism Antarctic Pelagic Crustacea Overwinter Life Sciences Marine Biology Torres, Joseph J. Aarset, A. V. Donnelly, J. Hopkins, Thomas L. Lancraft, T. M. Ainley, D. G. Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
topic_facet |
Metabolism Antarctic Pelagic Crustacea Overwinter Life Sciences Marine Biology |
description |
Oxygen comsumption rates were determined on 21 species of crustaceans typical of the Southern Ocean micronektonic crustacean assemblage during spring (November), fall (March), and winter (June-August). Specimens were collected in the Scotia-Weddell Sea region in the vicinity of 60-degrees-S, 40-degrees-W in the upper 1000 m of the water column. Respiration (y, mul O2mg-1 wet mass h-1) declined with depth of occurrence (x, m) according to the equation y = 0.125 x-0.172 +/- 0.052 (p < 0.05) despite the isothermal character of the water column, suggesting that lower metabolic rates are a temperature-independent adaptation to life in the deep sea. Three species of Crustacea showed a lowered metabolism during the winter season: the krill Euphausia superba and the 2 hyperiid amphipods Cyllopus lucasii and Vibilia stebbingi. Critical oxygen partial pressure (Pc) varied between 29 and 52 mm Hg, well below the lowest PO2 found in the water column. It is suggested that the long nights of the Antarctic winter decrease the effectiveness of visual predation in the epipelagic zone, allowing lowered metabolic rates to be a viable overwintering strategy for some species. |
format |
Article in Journal/Newspaper |
author |
Torres, Joseph J. Aarset, A. V. Donnelly, J. Hopkins, Thomas L. Lancraft, T. M. Ainley, D. G. |
author_facet |
Torres, Joseph J. Aarset, A. V. Donnelly, J. Hopkins, Thomas L. Lancraft, T. M. Ainley, D. G. |
author_sort |
Torres, Joseph J. |
title |
Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
title_short |
Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
title_full |
Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
title_fullStr |
Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
title_full_unstemmed |
Metabolism of Antarctic Micronektonic Crustacea as a Function of Depth of Occurrence and Season |
title_sort |
metabolism of antarctic micronektonic crustacea as a function of depth of occurrence and season |
publisher |
Digital Commons @ University of South Florida |
publishDate |
1994 |
url |
https://digitalcommons.usf.edu/msc_facpub/31 https://digitalcommons.usf.edu/context/msc_facpub/article/1030/viewcontent/hopkins.113.207_219.pdf |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Euphausia superba Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Euphausia superba Southern Ocean Weddell Sea |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/31 https://digitalcommons.usf.edu/context/msc_facpub/article/1030/viewcontent/hopkins.113.207_219.pdf |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
_version_ |
1772817170024103936 |