Polar Biology

, Volume 9, Issue 4, pp 253–260 | Cite as

Vertical distributions of primary production and grazing by Calanus glacialis jaschnov and C. hyperboreus krøyer in Arctic waters (Barents Sea)

  • H. C. Eilertsen
  • K. S. Tande
  • J. P. Taasen


Simultaneous measurements of phytoplankton primary production, and zooplankton grazing by Calanus glacialis and C. hyperboreus were carried out over a 24h period at two stations northeast of Spitzbergen in July and August 1985. Phytoplankton biomass was concentrated in a sub-surface maximum, and our results suggested that 65% to 90% of the carbon produced was grazed by these copepods. At both stations maximum grazing rates by these zooplankton were observed within and below the depth of maximum primary production. At least one third of regenerated primary production could be sustained by ammonia excreted by the large zooplankton species Calanus glacialis and C. hyperboreus.


Biomass Phytoplankton Vertical Distribution Phytoplankton Biomass Station Maximum 
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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • H. C. Eilertsen
    • 1
  • K. S. Tande
    • 1
  • J. P. Taasen
    • 1
  1. 1.Norwegian College of Fisheries ScienceUniversity of TromsøTromsøNorway

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