The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean

Seasonal variation in abundance and biomass of different instars of Oithona similis was studied for stations in the Weddell Sea and the Antarctic Circumpolar Current south of 60°S sampled in different years. Egg production was more spread over the seasons than in most calanoid copepod species and th...

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Published in:ICES Journal of Marine Science
Main Authors: Fransz, H. G., Gonzalez, S. R.
Format: Text
Language:English
Published: Oxford University Press 1995
Subjects:
Online Access:http://icesjms.oxfordjournals.org/cgi/content/short/52/3-4/549
https://doi.org/10.1016/1054-3139(95)80069-7
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author Fransz, H. G.
Gonzalez, S. R.
author_facet Fransz, H. G.
Gonzalez, S. R.
author_sort Fransz, H. G.
collection HighWire Press (Stanford University)
container_issue 3-4
container_start_page 549
container_title ICES Journal of Marine Science
container_volume 52
description Seasonal variation in abundance and biomass of different instars of Oithona similis was studied for stations in the Weddell Sea and the Antarctic Circumpolar Current south of 60°S sampled in different years. Egg production was more spread over the seasons than in most calanoid copepod species and the mean stage was more constant, indicating a mixing of age classes and overlap of generations. Juvenile stages increase in abundance between October and January, but the main development of copepodids was between January and May. A minimum estimate of daily growth rate of 1.5% body weight corresponds with a development from Nauplius 1 to Copepodite 5 between 1 November and 30 May and leads to an annual Production/Biomass (P/B) ratio of 3.3. The mean population biomass in the southern waters was 150 mgC m−2 in the epipelagic zone and the minimum estimate of annual production 0.5 gC m−2. Because the contribution of the species to zooplankton biomass in the Southern Ocean may be higher than elsewhere and the annual P/B is generally much higher than in the larger calanoid species, the production of Oithona similis may be the highest of all zooplankton species in the Antarctic region.
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genre Antarc*
Antarctic
Southern Ocean
Weddell Sea
genre_facet Antarc*
Antarctic
Southern Ocean
Weddell Sea
geographic Antarctic
Southern Ocean
The Antarctic
Weddell
Weddell Sea
geographic_facet Antarctic
Southern Ocean
The Antarctic
Weddell
Weddell Sea
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op_rights Copyright (C) 1995, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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spelling fthighwire:oai:open-archive.highwire.org:icesjms:52/3-4/549 2025-01-16T19:07:03+00:00 The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean Fransz, H. G. Gonzalez, S. R. 1995-06-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/52/3-4/549 https://doi.org/10.1016/1054-3139(95)80069-7 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/52/3-4/549 http://dx.doi.org/10.1016/1054-3139(95)80069-7 Copyright (C) 1995, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1995 fthighwire https://doi.org/10.1016/1054-3139(95)80069-7 2016-11-16T19:02:33Z Seasonal variation in abundance and biomass of different instars of Oithona similis was studied for stations in the Weddell Sea and the Antarctic Circumpolar Current south of 60°S sampled in different years. Egg production was more spread over the seasons than in most calanoid copepod species and the mean stage was more constant, indicating a mixing of age classes and overlap of generations. Juvenile stages increase in abundance between October and January, but the main development of copepodids was between January and May. A minimum estimate of daily growth rate of 1.5% body weight corresponds with a development from Nauplius 1 to Copepodite 5 between 1 November and 30 May and leads to an annual Production/Biomass (P/B) ratio of 3.3. The mean population biomass in the southern waters was 150 mgC m−2 in the epipelagic zone and the minimum estimate of annual production 0.5 gC m−2. Because the contribution of the species to zooplankton biomass in the Southern Ocean may be higher than elsewhere and the annual P/B is generally much higher than in the larger calanoid species, the production of Oithona similis may be the highest of all zooplankton species in the Antarctic region. Text Antarc* Antarctic Southern Ocean Weddell Sea HighWire Press (Stanford University) Antarctic Southern Ocean The Antarctic Weddell Weddell Sea ICES Journal of Marine Science 52 3-4 549 555
spellingShingle Articles
Fransz, H. G.
Gonzalez, S. R.
The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title_full The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title_fullStr The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title_full_unstemmed The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title_short The production of Oithona similis (Copepoda: Cyclopoida) in the Southern Ocean
title_sort production of oithona similis (copepoda: cyclopoida) in the southern ocean
topic Articles
topic_facet Articles
url http://icesjms.oxfordjournals.org/cgi/content/short/52/3-4/549
https://doi.org/10.1016/1054-3139(95)80069-7