SS1.03 Zooplankton Response to Climate Variability
Date: Tuesday, June 11, 2002
Location: Poster Session - VCC
 
SaumweberWJ, University of Rhode Island Graduate School of Oceanography, Narragansett, USA, whitley@gso.uri.edu
Durbin, E, G, University of Rhode Island Graduate School of Oceanography, Narragansett, USA, edurbin@gso.uri.edu
 
METABOLIC STATUS OF THE CALANOID COPEPOD CALANUS FINMARCHICUS DURING THE SUMMER AND FALL ON THE NORTHEAST AMERICAN SHELF
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Calanus finmarchicus is the dominant member of the mesozooplankton biomass in the Gulf of Maine (GOM) during the productive spring months. Most of the population leaves the surface waters by June and resides in a state of diapause in three deep basins until the following sping bloom. However, recent work in the Northeast Atlantic has suggested that diapause survival at temperatures similar to those of the GOM in summer and fall should be low. Five cruises were carried out from June, 2001 - January, 2002 in the GOM and on the Scotian Shelf to investigate this possibility. Depth stratified samples were taken and animals were later assayed for RNA/DNA levels, C and N content, size, and lipid reserves to assess their metabolic state, fitness, and survivability and how these factors vary over space and time. Of particular interest is how some or all of these factors covary, which may suggest the existence of subpopulations and provide evidence of possible advective source regions for the basin populations. Results will be presented.