74
M.T. Arts
:; 100
E
'2
..
!
c
s c: 0
u
10
'tI
;g.
S
{!.
1
J
F
M
A
M
J
J
A
S
0
Month
700
---*- Diaptomus siellis
600
--{}- Daphnia pulex
-A- Diaptomus nevadensis
'IE 500
bI
§.
10 400
'tI
'Q.
::::;
~
300
c(
S 200
{!.
100
0
J
F
M
A
M
J
J
A
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0
Month
FIGURE 4.1. Total lipids of three dominant zooplankton species in saline Redberry Lake,
Saskatchewan, from January to October 1994 expressed on an individual basis (top panel)
and on an areal basis (lower panel). Data are for adult animals only. Note the log scale in the
upper panel. Error bars are 95% confidence intervals.
blages and physiological conditions of phytoplankton as they exist in the lake/
wetland. Therefore, correlative field studies of the type mentioned here are often
more realistic despite their more circumstantial nature when compared with laboratory feeding studies. Field studies of this type also provide information on the
rate of zooplankton lipid deposition/loss under a variety of special conditions
(e.g., during algal blooms, during periods of unusually cold or warm water
temperatures).