Juvenile Oyster Disease Data

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
(Deployed
May 23)

Cohort 2
(Deployed
Jun 8)

Cohort 3
(Deployed
Jun 22)

Cohort 4
(Deployed
Jul 6)

Cohort 5
(Deployed
Jul 22)

Cohort 6
(Deployed
Aug3)

Cohort 7
(Deployed
Aug 18)

Cohort 8
(Deployed
Aug 31)

Mean Weekly
Temp (C)

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.