Gut contents and diel feeding rhythm in dominant copepods in the ice-covered Weddell Sea, March 1992

Zooplankton was sampled at a diurnal station during the drift of the Ice Station Weddell-1 in the western Weddell Sea in March 1992. Gut contents of Metridia gerlachei, Calanoides acutus, Calanus propinquus and Rhincalanus gigas were studied. Calanoides acutus was trophically inactive, but 18%, 33%...

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Bibliographic Details
Published in:Polar biology 1995-09, Vol.15 (8), p.583-586
Main Author: Pasternak, AnnaF
Format: Article
Language:English
Subjects:
Calanoides acutus
Calanus propinquus
Copepoda
Marine
Metridia gerlachei
Rhincalanus gigas
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Summary:Zooplankton was sampled at a diurnal station during the drift of the Ice Station Weddell-1 in the western Weddell Sea in March 1992. Gut contents of Metridia gerlachei, Calanoides acutus, Calanus propinquus and Rhincalanus gigas were studied. Calanoides acutus was trophically inactive, but 18%, 33% and 45% of Calanus propinquus, R. gigas and M. gerlachei , respectively, contained food in their guts. Diel changes in gut levels and percentage of individuals with full guts with maximum during the dark period were observed in M. gerlachei copepodite stage V and females. The possible reasons for observed differences in foraging patterns of the four copepod species are discussed.
ISSN:0722-4060
1432-2056
DOI:10.1007/BF00239650