Reservoir Plankton Communities 
95 
Table 4. Yearly mean densities (no./m 3 ) and biomass (mg/m 3 ) of major 
zooplankton taxa groups at Sutton Reservoir during 1985. 
Taxa Group 
Densities 
Biomass 
Total copepods 
36,701 
51.0 
Total cladocerans 
8,512 
14.0 
Total rotifers 
68,773 
3.0 
Total zooplankton 
113,986 
68.0 
c 
a> 
o 
w. 
a> 
CL 
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 
Month 
■■i Cope pods 
Cladocerans 
i I Rotifers 
Fig. 3. Percent composition of total zooplankton density by major taxa groups 
for Sutton Reservoir during 1985. 
