454 BULLETIN OF THE BUREAU OF FISHERIES 
Table 8. — Temperature, salinity, and pH of water at different depths off Maple Point (Mud Bay) 
during 1 year — Continued 
Surface 
3 feet 
10 feet 
20 feet 
30 feet 
Date 
Tide 
Tem- 
Tem- 
Tem- 
Tem- 
Tem- 
pera- 
Salinity 
pH 
pera- 
Salinity 
pH 
pera- 
Salinity 
pH 
pera- 
Salinity 
pH 
pera- 
Salinity 
pH 
ture 
ture 
ture 
ture 
ture 
19S2 
° C. 
°C. 
0 C. 
° C. 
° C. 
May 6 
E 
11.4 
26.00 
8.4 
11.3 
26. 45 
8.4 
11.3 
26. 97 
8.4 
11. 1 
27.41 
8.4 
11. l 
27. 52 
8.4 
13 
E 
12. 4 
27. 64 
8.4 
12.3 
27. 88 
8.4 
12.3 
27. 93 
8.4 
11.2 
28. 30 
8.4 
11.2 
28. 48 
8.4 
20 
E 
12.3 
27. 03 
8.4 
12.3 
27. 17 
8.4 
12.2 
27. 32 
8.4 
12. 1 
28. 13 
8.4 
12.1 
28. 56 
8.4 
27 
F 
14.3 
27. 11 
8.4 
14.0 
27. 20 
13.3 
27. 54 
8.4 
12.3 
28. 01 
8.4 
12.2 
28. 03 
8.4 
June 3 
F 
14.0 
26. 74 
8.2 
14.0 
27. 30 
8.2 
13.2 
27. 66 
8.2 
13.0 
28. 19 
8.2 
12.4 
27. 98 
8.2 
10 
E 
19.2 
27. 14 
8.2 
18.0 
27. 03 
8.4 
15.4 
28. 15 
8.4 
14.0 
28. 19 
8.4 
13.4 
28. 16 
8.4 
16 
E 
15. 1 
27.60 
8.2 
15. 2 
27. 81 
8.4 
14.4 
28. 39 
8.4 
14.2 
28. 21 
8.4 
14.0 
28. 65 
8.4 
23 
E 
15. 1 
28. 21 
8.2 
15.2 
28.12 
15.2 
28. 39 
8.2 
14.4 
28. 51 
8.2 
14.0 
28. 46 
8.2 
July 10 
F 
16.2 
26. 58 
8. 1 
16.2 
27. 65 
8.2 
16.0 
27. 65 
8.2 
15.3 
27. 92 
8.2 
15.2 
28. 03 
8.2 
21 
E 
16. 2 
28.28 
8.2 
16. 1 
28. 45 
lfi.O 
28. 12 
15. 2 
28. 43 
15. 1 
28.53 
Aug. 2 
F 
17.2 
28. 06 
8.2 
16.4 
28. 37 
8.4 
16.4 
28. 37 
8.4 
16.2 
28. 64 
8.4 
16.2 
28. 89 
8.4 
4 
F 
20.0 
28. 33 
8.2 
18.0 
28. 66 
8.2 
17.3 
28. 99 
8.4 
17.4 
28.82 
8.4 
17.4 
28. 91 
8.4 
11 
F 
15.3 
28. 19 
8. 1 
15.3 
28.19 
8.2 
15.3 
28. 35 
8.2 
15.2 
28. 87 
8.2 
15.1 
28. 00 
8.2 
18 
F 
17.4 
28.06 
8.0 
17.4 
28. 48 
8.2 
17.0 
28. 08 
8.4 
16.4 
28. 87 
8.4 
16.4 
28.74 
8.4 
25 
F 
16.4 
28. 93 
8.2 
16.0 
28. 82 
8.4 
15.4 
29. 08 
8.4 
15.0 
29. 22 
8.4 
15.0 
29. 08 
8.4 
Sept. 22 
F 
15.2 
29. 63 
8.4 
15. 0 
29. 22 
8.4 
15.0 
29. 34 
8.4 
14.2 
29. 47 
8.4 
14.2 
29. 69 
8.4 
29 
F 
15.2 
28.59 
7.9 
15.2 
28.80 
8.0 
15. 1 
28.80 
8.0 
14.4 
28.99 
8.0 
14.4 
29. 17 
8.0 
Oct. 5 
F 
14.3 
29. 08 
8.0 
14.3 
28. 95 
8.0 
14.2 
29.18 
8.2 
14.2 
29. 47 
8.2 
14.2 
29. 75 
11 
F 
13.1 
29. 63 
8.2 
13.1 
29. 70 
8. 2 
13.0 
29. 87 
8.2 
13. 1 
29.87 
8.2 
13.1 
29. 85 
8.2 
15 
E 
13.4 
28. 95 
7.9 
13.4 
29. 27 
7.9 
13.2 
29. 13 
7.9 
13.2 
29. 33 
7.9 
13.2 
29.84 
7.9 
18 
E 
12.4 
29.20 
7.8 
12.4 
29. 22 
7.8 
12.4 
29. 13 
8.0 
13.0 
29. 38 
8.0 
13.0 
29. 16 
8.0 
25 
F 
12.4 
29. 58 
8.0 
13.0 
29. 31 
8.0 
13.0 
8.0 
13.0 
29. 23 
8.0 
13.0 
29.28 
8.0 
Nov. 1 
E 
10.4 
26. 96 
7.9 
11.2 
27. 11 
7.9 
11.2 
29. 70 
8.0 
11.2 
29.23 
8.0 
29.36 
8.0 
8 
F 
11.0 
23.53 
7.9 
11.0 
24.71 
7.9 
11.0 
26. 40 
7.9 
11.2 
29. 72 
7.9 
11.2 
29. 42 
7.9 
17 
E 
11.4 
27. 12 
7.9 
11.4 
27.17 
7.9 
11.4 
28. 82 
7.9 
11.3 
28. 93 
7.9 
11.3 
29.22 
7.9 
22 
F 
8.2 
22. 92 
7.8 
10.2 
28. 69 
7.9 
10.2 
28. 50 
7.9 
10. 2 
28. 69 
7.9 
10.2 
28.79 
7.9 
29 
E 
10.2 
26. 73 
10.2 
27. 18 
7.8 
10.2 
28. 08 
7.9 
10. 2 
28. 17 
10.2 
27. 95 
7.9 
Dec. 6 
F 
8.3 
26.17 
7.8 
9.0 
26. 65 
7.8 
9.0 
27. 84 
7.8 
9.1 
27. 85 
7.8 
9.1 
28. 06 
7.8 
20 
F 
7.1 
27.31 
7.8 
7.0 
27.16 
7.9 
7.0 
28.30 
7.9 
6.4 
28. 22 
7.9 
6.4 
28. 22 
7.9 
Note.— E=ebb; F=flood. 
To indicate in detail the changes in temperature, salinity, and pH at different 
depths, tables 7 and 8 are reproduced, showing the observations made over a period 
of 1 year in Oyster Bay and Mud 
Bay, at the points previously de- 
scribed. In Oyster Bay samples 
were taken at surface, 6, 15, 30, 
and 50 feet; in Mud Bay at surface, 
3, 10, 20, and 30 feet. These tables 
give in detail both the seasonal 
variation in the water and the 
effect of depth. The surface 
water is, in some cases, quite 
Figure 12. — Variation in salinity and pH in a dike in Oyster Bay during a 
complete tidal cycle. See also figures 34 to 37. 
^different from that below. 
Table 9. — Comparison of temperature, salinity, and pH of water at different depths during winter and 
summer off Corters Point, Oyster Bay; and Maple Point, Mud Bay 
Winter 1 
Summer 2 
Winter 
Summer 2 
Depth 
Tem- 
pera- 
ture 
Salinity 
pH 
Tem- 
pera- 
ture 
Salinity 
pH 
Depth 
Tem- 
pera- 
ture 
Salinity 
pH 
Tem- 
pera- 
ture 
Salinity 
pH 
Maple Point: 
Surface 
0 C. 
5.8 
24. 75 
8.0 
° C. 
16.5 
27.82 
8.16 
Corters Point: 
Surface 
° C. 
6.4 
26. 06 
7.9 
° C. 
16.3 
28. 21 
8.28 
3 feet. 
6.7 
26. 37 
8.0 
16. 1 
28. 16 
8. 27 
6 feet— 
6.7 
27. 05 
8.0 
16.3 
28. 29 
8.31 
10 feet 
7.2 
28. 61 
8.0 
15.6 
28. 29 
8. 32 
15 feet 
7.0 
27. 62 
8.0 
16.1 
28. 21 
8.3 
20 feet 
7.4 
28. 61 
8.0 
15. 1 
28. 53 
8. 32 
30 feet 
7.1 
27.91 
8.0 
15.8 
28.25 
8. 32 
30 feet 
8.0 
28. 99 
8.0 
14.9 
28. 57 
8. 32 
50 feet 
7.1 
27. 93 
8.0 
15.7 
28. 36 
8.3 
1 December 1931, January and February 1932. 
2 June, July, and August 1932. 
