PLANKTON IN NITROGEN AND PHOSPHORUS CYCLES
143
AND PHOSPHORUS IN ZOOPLANKTON
N
P
N:P R d i o
(% Dry wt) (% Dry wt) Weighl Atoms
Referenem
10.35
4.97
9.70
8.24
9.24
1.34
8.91
10.2
11.6
9.62
9.96
7.83
7.84
8.92
2.97
2.89
3.25
11.1
8.9
9-6
10-7
9.1
8.0
11.1
7.6
9.1
6.0
7.8
1.58
1.64
1-70
1.60
0.95
0.23
0.82
1.07
0.82
0.79
1.48
1 *26
0.63
0.99
0.14
0.17
0.30
1.16
0.99
0.80
1 *20
1-17
0.91
1.16
0.80
0.75
0.55
0.61
6.52
3.03
5.71
5.16
9.78
5.81
9.53
10.9
14.1
12.2
6.74
6.23
9.01
12.4
21.2
17.0
10.8
9.6
9.0
9.5
8.9
7.8
8.7
9.55
9.45
12.1
10.9
12.8
14.4
6.7
12.6
11.4
21.7
12.8
22.9
21.1
31.1
26.9
14.9
13-8
27.6
19.9
46.5
37.5
23.9
21.2
19.9
21.0
19.7
17.3
19.2
21.1
20.9
26.7
24.0
28.3
Brandt and Reben
Brandt and Raben
Cooper (1939)
Cooper (1939)
Cooper (1939)
Cooper (1939)
Harris and Riley (1956)
Vinogradov (1963)
Delff (1912)
Beers (1966)
Beers (1966)
Beers (1966)
Beers (1966)
Beers (1966)
Beers (1966)
Beers (1966)
Beers (1966)
Butler el d. (1969)
Butler el al. (1969)
Butler el 01. (1969)
Butler et d. (1969)
Butler el d. (1969)
Butler el al. (1969)
Butler et d. (1969)
Butler el d. (1969)
Butler el al. (1969)
Butler et al. (1969)
Butler et al. (1069)
(1919)
(1919)
levels seem characteristic of many species. For example, Vinogradova
(1960) gives values ranging from 55-61 % dry body weight for Euphausia
superba Dana; Raymont et al. (1969), who determined protein dircctly
by the biuret reaction, obtained values of 50-62% for Meganyctiphanes
norvegim and 5 2 4 4 % for Thysanoessa inermis (Kr~yer); a value of
70% was found by Raymont et al. (1964, 1966) for Neomysis integer
(Leach) and Leptomysis Zingvura (G. 0. Sars) ; Pavlova (1967) gives
values ranging from 59.8-66.2% for various Black Sea cladocerans ;
and Nakai (1955), estimating protein as body N x 6.25, obtained
values ranging from 34-8-82-6% for several species of copepod from the
Sea of Japan.