Table 1. Mean cumulative mortality (%) of oyster (C. virginia) cohorts from May 27 to December 9, 1995.
Juvenile Oyster Mean Cumulative Mortality (%) |
|||||||||
Date |
Cohort 1 |
Cohort 2 |
Cohort 3 |
Cohort 4 |
Cohort 5 |
Cohort 6 |
Cohort 7 |
Cohort 8 |
Mean Weekly |
May 27 |
0 |
|
|
|
|
|
|
|
13.8 |
Jun 3 |
1 |
|
|
|
|
|
|
|
16.7 |
Jun 10 |
1 |
|
|
|
|
|
|
|
17.2 |
Jun 17 |
1 |
0 |
|
|
|
|
|
|
16.8 |
Jun 24 |
1 |
1 |
|
|
|
|
|
|
20.3 |
Jul 1 |
1 |
1 |
0 |
|
|
|
|
|
21.2 |
Jul 8 |
1 |
2 |
1 |
|
|
|
|
|
22.8 |
Jul 15 |
2 |
2 |
1 |
0 |
|
|
|
|
21.3 |
Jul 22 |
3 |
2 |
1 |
1 |
|
|
|
|
21 |
Jul 29 |
3 |
3 |
1 |
1 |
0 |
|
|
|
23.1 |
Aug 5 |
3 |
4 |
1 |
2 |
1 |
|
|
|
22.3 |
Aug 12 |
3 |
11 |
2 |
3 |
1 |
|
|
|
22.5 |
Aug 19 |
3 |
15 |
2 |
3 |
1 |
0 |
|
|
22.6 |
Aug 26 |
3 |
29 |
3 |
4 |
2 |
1 |
|
|
21 |
Sep 2 |
3 |
31 |
3 |
22 |
6 |
1 |
0 |
|
18.9 |
Sep 9 |
3 |
36 |
22 |
55 |
49 |
1 |
1 |
|
18.7 |
Sep 16 |
3 |
47 |
29 |
65 |
78 |
1 |
1 |
0 |
16.8 |
Sep 23 |
6 |
51 |
50 |
78 |
88 |
41 |
1 |
0 |
16.3 |
Sep 30 |
7 |
55 |
53 |
80 |
90 |
58 |
2 |
0 |
14.3 |
Oct 7 |
10 |
56 |
54 |
81 |
93 |
82 |
3 |
0 |
14.7 |
Oct 14 |
11 |
58 |
58 |
83 |
94 |
89 |
4 |
0 |
14.2 |
Oct 21 |
|
|
|
|
|
|
|
|
12.7 |
Oct 28 |
14 |
61 |
62 |
84 |
94 |
94 |
25 |
1 |
12.5 |
Nov 4 |
|
|
|
|
|
|
|
|
9.6 |
Nov 11 |
18 |
62 |
64 |
85 |
95 |
97 |
74 |
7 |
9.8 |
Nov 18 |
|
|
|
|
|
|
|
|
8.5 |
Nov 25 |
|
|
|
|
|
|
|
|
7.8 |
Dec 2 |
|
|
|
|
|
|
|
|
6.4 |
Dec 9 |
20 |
64 |
66 |
85 |
95 |
97 |
90 |
9 |
5.2 |
Table 2. Mean shell height (mm) of oyster (C. virginia) cohorts from May 27 to December 9, 1995.
Juvenile Oyster Mean Shell Height (mm) |
||||||||
Date |
Cohort 1 |
Cohort 2 |
Cohort 3 |
Cohort 4 |
Cohort 5 |
Cohort 6 |
Cohort 7 |
Cohort 8 |
May 27 |
2.5 |
|
|
|
|
|
|
|
Jun 3 |
|
|
|
|
|
|
|
|
Jun 10 |
|
2.5 |
|
|
|
|
|
|
Jun 17 |
|
|
|
|
|
|
|
|
Jun 24 |
|
|
2.5 |
|
|
|
|
|
Jul 1 |
|
|
|
|
|
|
|
|
Jul 8 |
|
|
|
2.5 |
|
|
|
|
Jul 15 |
|
|
|
|
|
|
|
|
Jul 22 |
11 |
|
|
|
2.5 |
|
|
|
Jul 29 |
15 |
9 |
|
|
|
|
|
|
Aug 5 |
21 |
16 |
12.5 |
8 |
8 |
2.5 |
|
|
Aug 12 |
27.5 |
22 |
19 |
|
|
|
|
|
Aug 19 |
29.5 |
22.5 |
18.5 |
14.5 |
11 |
|
2.5 |
|
Aug 26 |
29 |
21 |
17.5 |
13 |
12.5 |
|
|
|
Sep 2 |
33 |
22 |
18 |
13 |
11 |
|
|
2.5 |
Sep 9 |
30.5 |
22.5 |
18 |
15 |
11.5 |
10 |
|
|
Sep 16 |
31 |
23 |
19 |
16 |
12 |
12 |
|
|
Sep 23 |
33.5 |
23 |
20 |
17.5 |
12.5 |
12 |
|
|
Sep 30 |
33 |
25.5 |
21 |
17.5 |
14 |
12.5 |
9 |
|
Oct 7 |
34.5 |
25 |
21 |
20 |
14.5 |
13.5 |
11 |
|
Oct 14 |
35 |
27.5 |
22.5 |
22 |
|
|
|
|
Oct 21 |
|
|
|
|
|
|
|
|
Oct 28 |
|
|
|
|
|
|
|
|
Nov 4 |
|
|
|
|
|
|
|
|
Nov 11 |
|
|
|
|
|
|
|
|
Nov 18 |
|
|
|
|
|
|
|
|
Nov 25 |
|
|
|
|
|
|
|
|
Dec 2 |
|
|
|
|
|
|
|
|
Dec 9 |
37 |
28 |
25 |
25 |
21 |
18 |
11 |
9 |
These data are from a scientific study conducted at the University of Maine and published as:
Barber, B.J., R.B. Carnegie, C.V. Davis and W. Mook. 1996. Effect of timing of seed deployment on growth and mortality of oysters, Crassostrea virginia, affected by Juvenile Oyster Disease (JOD). Journal of the World Aquaculture Society 27(4):443-448.