172 BULLETIN OF THE BUREAU OF FISHERIES 
Table 5. — Data on phosphorous determinations in milligrams per liter of water in the C ponds in 1928 
Date 
Total 
Dissolved 
Organic 
C 1 
C 2 
C 3 
C 4 
C 1 
C 2 
C 3 
C 4 
C 1 
C 2 
C 3 
C 4 
June 19 
1.28 
Nil. 
0. 005 
Nil. 
June 22 
1. 50 
Nil. 
. 010 
Nil. 
June 27 
1.850 
0. 095 
0. 250 
0.045 
1.80 
0.025 
.025 
Trace. 
0. 050 
0. 072 
0.225 
0.045 
June 28 
1. GO 
. 010 
. 025 
Nil. 
July 7 
. 120 
. 170 
.025 
1. 60 
Nil. 
.008 
Nil. 
. 120 
. 162 
. 025 
July 14 
.640 
.022 
.012 
Trace. 
July 19.. 
.400 
.070 
. 150 
.015 
.360 
Trace. 
.055 
Trace. 
.040 
.070 
.095 
.015 
July 24 .. 
. 240 
Nil. 
. 220 
Nil. 
. 165 
Nil. 
.360 
Nil. 
July30_. . 
. 120 
.110 
.700 
.058 
.075 
Trace. 
.620 
Nil. 
.045 
. no 
.080 
.058 
.050 
Aug. 3 
.048 
Nil. 
.620 
Nil. 
.045 
Aug. 9 
.225 
. 175 
.880 
.058 
.055 
.015 
. 750 
Trace. 
. 175 
. 160 
. 130 
.058 
Aug. 20 
.880 
.280 
.900 
. 045 
.80 
.096 
.900 
0. 012 
.080 
. 184 
.060 
.033 
Aug. 30 
1. 120 
. 500 
1.00 
.045 
.550 
.090 
.450 
.003 
.570 
.410 
.550 
.042 
Sept. 13 
1 . 10 
. 150 
.020 
.038 
.960 
.020 
. 520 
Nil. 
. 140 
. 130 
.100 
.038 
Sept. 19 
.900 
. 128 
.900 
.050 
.850 
.003 
.850 
.010 
.050 
. 125 
.050 
.040 
Table 6. — Net plankton in cubic centimeters per 10 liters of water in the C ponds in 1928 
Date 
C 1 
0 2 
C 3 
C 4 
Date 
C 1 
C 2 
C 3 
C 4 
Date 
C 1 
C 2 
C 3 
C 4 
0. 10 
0. 10 
0. 10 
0. 10 
July 14 
0.05 
0.20 
0.25 
0. 10 
Aug. 17 
1. 15 
0. 60 
0. 55 
0. 10 
June 13 
.12 
.20 
.35 
.10 
July 16 
.25 
.27 
.30 
.03 
Aug. 18 
.60 
.65 
.70 
.15 
June 15 
.12 
.40 
.50 
.05 
July 18 
.15 
.20 
.35 
.10 
Aug. 20 
.40 
.70 
.35 
.30 
June 16 
.16 
.30 
.35 
.10 
July 19 
.03 
.12 
.60 
.10 
Aug. 21 
.40 
.60 
.28 
. 12 
June 19.. .. 
.20 
.70 
.65 
.05 
July 21 
. 10 
.45 
. 65 
.12 
Aug. 22 
.35 
.70 
.32 
.30 
June 20. ... 
.20 
.40 
.40 
.05 
July 23 
.35 
.18 
.60 
.10 
Aug. 23 
.12 
.48 
.30 
. 12 
June 21 
.15 
.45 
.50 
.10 
July 25. ... 
3.00 
.15 
.65 
.07 
Aug. 24 
. 15 
.55 
. 18 
. 15 
June 22 
.20 
.45 
.95 
.10 
July 28 
.85 
.22 
.38 
.06 
Aug. 27 
.25 
.55 
.28 
. 12 
June 23 
.35 
.43 
. 41 
. 12 
July 30 
3.50 
.48 
.28 
.07 
Aug. 28 
.20 
1.0 
. 18 
.13 
June 24. ... 
. 15 
.75 
.65 
. 10 
July 31 
4.0 
.40 
.40 
.25 
Aug. 29 
.30 
.90 
.70 
.18 
. 14 
. 60 
. 85 
. 28 
9.0 
. 18 
.35 
. 13 
Aug. 30 
.33 
.63 
. 55 
. 22 
. 18 
.32 
.35 
. 15 
Aug. 2 
4.4 
.45 
.40 
.08 
Aug. 31 
.22 
.48 
.50 
. 15 
. 10 
.39 
.29 
. 10 
Aug. 3 
4.0 
.32 
.30 
. 15 
Sept. 1 
.50 
.60 
. 50 
.30 
. 18 
.70 
. 50 
. 40 
Aug. 4 
4.0 
.40 
.30 
. 12 
Sept. 4. _. . 
.25 
. 55 
.35 
. 10 
.30 
.45 
. 18 
. 12 
Aug. 6_ 
8.6 
.70 
.20 
. 16 
Sept. 5 
.25 
.40 
.35 
. 18 
July 2 
. 20 
.30 
.15 
.05 
Aug. 7 
6.8 
.28 
.20 
.18 
Sept. 6 
.28 
.40 
.20 
. ]5 
July 5 
.10 
.32 
.10 
.05 
Aug. 8 
3.5 
.28 
.22 
.10 
Sept. 14 
.40 
.45 
.25 
.10 
. 10 
. 40 
.03 
.05 
Aug. 9. ... 
3.8 
.30 
.18 
. 10 
Sept. 15 
.20 
.60 
.20 
. 10 
July 9 
. 15 
.50 
.20 
. 10 
Aug. 10 
2.8 
.26 
.28 
.06 
Sept. 16 
.35 
.40 
.22 
. 10 
July 10 
.10 
.50 
. 10 
.05 
Aug. 11 
3.2 
.48 
.28 
.04 
Sept. 17 
.60 
.60 
.25 
. 12 
July 11 
.50 
.10 
.25 
.03 
Aug. 13 
2.3 
.38 
.50 
.08 
Sept. 19 
.40 
.60 
.20 
.10 
July 12 
.30 
.30 
.60 
. 10 
Aug. 15 
3.7 
.30 
.92 
.10 
Sept. 20 
.35 
.50 
.30 
.15 
July 13 
.05 
.30 
.30 
.07 
Aug. 16 
2.3 
.70 
.75 
.25 
Table 7. — Animals in the net plankton in the C ponds in 1928 
Organism 
Pond 
Number 
of 
samples 
Average 
number 
per liter 
Organism 
Pond 
Number 
of 
samples 
Average 
number 
per liter 
C 1 
68 
70.38 
Ceriodaphnia 
C 1 
68 
69. 61 
C 2 
69 
505. 14 
C 2 
69 
5.9 
C 3 
70 
503. 73 
C 3 
70 
0.76 
C 4 
68 
31.53 
C 4 
68 
13.6 
C 1 
68 
325. 19 
Diaphanosoma 
C 1 
68 
8. 06 
C 2 
69 
1, 216. 39 
- 
C 2 
69 
0. 54 
C 3 
70 
26. 36 
C 3 
70 
0.15 
C 4 
68 
208. 12 
C 4 
68 
2.01 
C 1 
68 
4. 89 
Nauplii .. ..... 
C 1 
68 
3, 649. 68 
C 2 
69 
80. 27 
C 2 
69 
511. 16 
C 3 
70 
52. 30 
C 3 
70 
493. 98 
C 4 
68 
7. 07 
C 4 
68 
622. 95 
C 1 
68 
4. 37 
Anuraea 
C 1 
68 
691. 17 
C 2 
69 
3. 65 
C 2 
69 
92. 46 
C 3 
70 
37. 94 
C 3 
70 
130. 18 
C 4 
68 
1.30 
C 4 
68 
277. 44 
