© 1998 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
Variability in the population structure of Calanus finmarchicus in Icelandic waters in spring
Marine Research Institute Skúlagata 4, PO Box 1390, 121, Reykjavik, Iceland
Correspondence to A. Gislason: tel: +354 552 0240, fax: +354 562 3790, e-mail: astthor{at}hafro.is
Since 1961, long-term monitoring of zooplankton has been carried out during spring (MayJune) on standard sections around Iceland. An analysis of the onshoreoffshore variability in the population structure of Calanus finmarchicus during this time of the year indicates that off the east, south, and west coasts of Iceland reproduction is highest over the banks, while off the Vestfirdir Peninsula breeding activities appear to be largely confined to the frontal area between the Atlantic Water close to the land and the cold Polar Water farther out. In the deep waters north-east of Iceland, where the Arctic influence is generally greatest, the percentage of juvenile stages is very low, suggesting little reproduction in these cold water masses.
Keywords: Calanus finmarchicus, Icelandic waters, spatial variability