© 2004 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
Comparative ecology of over-wintering Calanus finmarchicus in the northern North Atlantic, and implications for life-cycle patterns
a Marine Laboratory PO Box 101, Victoria Road, Aberdeen, AB11 9DB, Scotland, UK
b University of Aberdeen, Department of Zoology Tillydrone Avenue, Aberdeen AB9 2TN, Scotland, UK
c Marine Research Institute Skulagata 4, PO Box 1390 Reykjavik, Iceland
d University of Strathclyde, Department of Statistics and Modelling Science Glasgow G1 1XH, Scotland, UK
e Department of Fisheries and Oceans, Ocean Science Division, Bedford Institute of Oceanography PO Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada
f Danish Institute for Fisheries Research Kavalergaarden 6, Charlottenlund, DK-2920 Denmark
g Plymouth Marine Laboratory Prospect Place, West Hoe, Plymouth PL1 3DH, England, UK
h Southampton Oceanography Centre, George Deacon Division Waterfront Campus, Empress Dock, Southampton SO14 3ZH, England, UK
i IPRC/SOEST, University of Hawaii POST Bldg. 409, 1680 East West Road, Honolulu, HI 96822, USA
j Department of Marine Ecology, University of Aarhus Finlandsgade 14, DK 8200 Aarhus, Denmark
*Correspondence to M. R. Heath: tel: +44 1224 876544; fax: +44 1224 295511. e-mail: heathmr{at}marlab.ac.uk.
Data from plankton net and Optical Plankton Counter sampling during 12 winter cruises between 1994 and 2002 have been used to derive a multi-annual composite 3-D distribution of the abundance of over-wintering Calanus finmarchicus in a swath across the North Atlantic from Labrador to Norway. Dense concentrations occurred in the Labrador Sea, northern Irminger Basin, northern Iceland Basin, eastern Norwegian Sea, Faroe–Shetland Channel, and in the Norwegian Trench of the North Sea. A model of buoyancy regulation in C. finmarchicus was used to derive the lipid content implied by the in situ temperature and salinity at over-wintering depths, assuming neutral buoyancy. The Faroe–Shetland Channel and eastern Norwegian Sea emerged as having the highest water column-integrated abundances of copepodites, the lowest over-wintering temperature, and the highest implied lipid content. The results are discussed in the context of spatial persistence of populations, seasonal patterns of abundance, and relationships between over-wintering and lipid accumulation in the surface waters.
Keywords: Iceland Basin, Irminger Sea, Labrador Sea, lipid, net sampling, Norwegian Sea, Optical Plankton Counter, vertical distribution, zooplankton
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  S. Plourde, P. Pepin, and E. J. H. Head Long-term seasonal and spatial patterns in mortality and survival of Calanus finmarchicus across the Atlantic Zone Monitoring Programme region, Northwest Atlantic ICES J. Mar. Sci., October 1, 2009; 66(9): 1942 - 1958. [Abstract] [Full Text] [PDF]
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