158
E. D. 9. CORNER AND ANTHONY a. DAVIES
,Old generation of@, V'r
LOld generation of Q
I Mixed Q I First generatlon of Q
,New generation o f 6 and V's
0 4
m
al
Y
z1
z
E
-
$ 0 2
2 !
t i
L
W
0
1 5
x
rr
m
E
-
.c
0
c)
.
f
5
Z
W -.
0 5
FIG. 7. Changes in nitrogen and phosphorus excretion (as pg/animal/day) by Calanus
during the spring diatom increase in 1969. Symbols for animals and chlorophyll a
as in Fig. 6. Hatched areas show diatom cell counts/litre. Horizontal scale expanded
during April. (From Butler el al., 1970. Reproduced by kind permission of the
Council of the Marine Biological Association of the United Kingdom.)
those of the plant food (in terms of cell counts and chlorophyll a ) there
is clear evidence that a, dramatic increase in excretion rates follows
closely upon the appearance of the diatom increase, and that excretion
begins to fall once the initial peak of plant production is over.
E. D. 9. CORNER AND ANTHONY a. DAVIES
,Old generation of@, V'r
LOld generation of Q
I Mixed Q I First generatlon of Q
,New generation o f 6 and V's
0 4
m
al
Y
z1
z
E
-
$ 0 2
2 !
t i
L
W
0
1 5
x
rr
m
E
-
.c
0
c)
.
f
5
Z
W -.
0 5
FIG. 7. Changes in nitrogen and phosphorus excretion (as pg/animal/day) by Calanus
during the spring diatom increase in 1969. Symbols for animals and chlorophyll a
as in Fig. 6. Hatched areas show diatom cell counts/litre. Horizontal scale expanded
during April. (From Butler el al., 1970. Reproduced by kind permission of the
Council of the Marine Biological Association of the United Kingdom.)
those of the plant food (in terms of cell counts and chlorophyll a ) there
is clear evidence that a, dramatic increase in excretion rates follows
closely upon the appearance of the diatom increase, and that excretion
begins to fall once the initial peak of plant production is over.