SPATIAL VARIABILITY OF CALANUS-EUXINUS LI PID-CONTENT IN CONNECTION WITH CHLOROPHYLL CONCENTRATION AND PHYTOPLANKTON BIOMASS

Lipid content of Calanus euxinus (for V copepodites and females) was i nvestigated in different regions of the Black Sea with large horizonta l gradients of chlorophyll ''a'' concentrations and biomass of phytopl ankton (total, different sizes, groups and species). Linear correlatio ns between total lipids, wax esters, triacylglicerols, phospholipids c oncentration of C. euxinus and primary production characteristics in t he surrounding water were calculated. These correlations allow us to d isplay not only simple trophical relationship of Calanus with phytopla nkton but also show the selective role of individual species of algae in forming lipid reserves by Calanus. It also becomes clear that spati al variability of chlorophyll ''a'' concentrations and biomass of phyt oplankton strongly correlate only with those lipids (wax esters and ph ospholipids) of C. euxinus which are reserved and contained in organis ms for a long time. Correlation does not appear for high-speed metabol ized triacyglycerols.