PRODUCTION AND COLLECTION OF SEED OYSTERS 237 
27,700 spat per bushel. No significant differences were observed in setting along the 
three different lines. 
Table 24 . — Vertical distribution of set in Onset Bay, 1928 
[Wire-bag collectors] 
Height in relation to 
low water (feet) 
Spat per bushel 
Height in relation to 
low water (feet) 
Spat per bushel 
Shell Point Bar 
Sherman 
Bar 
Shell Point Bar 
Sherman 
Bar 
Line 1 
Line 2 
Line 3 
Line 4 
Line 1 
Line 2 
Line 3 
Line 4 
+2.0 
1,900 
5,700 
12, 400 
10, 800 
17, 300 
-0.5 
27, 700 
2,300 
5,100 
3,800 
11, 900 
+1.5 
— 1.0 
11,400 
8, 600 
+1.3 
41, 800 
64. 400 
55. 400 
— 1.5 
14, 700 
11,600 
19, 200 
7,400 
+1.0 
44,800 
48, 300 
33, 700 
68, 700 
61, 200 
-2.0 
+0.5 
-2.5.. _. 
10,500 
4, 800 
-3.0 _. 
2,000 
At Sherman Bar (line 4, Table 24) the largest number of seed (17,300 per bushel) 
was found at 0.5 foot above low water. This level is about 1.5 feet below the area 
— 1 ’ T , ' 
-3 -2 ”1 0 +1 +2 + 3 
TILT BELOW AMD ABOVE LOW WATER 
Figure 23.— Vertical distribution of setting in wire bag collectors planted in Onset Bay, 1927 
and 1928 
upon which shells were scattered by commercial oystermen. It is obvious that the 
productivity of this bar would be materially increased by grading it down until its 
entire surface is 1.5 below the present planted area. In most of the bars the areas 
upon which shells are planted by the oystermen do not extend beyond 1.5 feet below 
low water; yet, as the observations show, a fairly good set can be obtained at 3 feet 
