Chesapeake Bay Field Survey for Juvenile Callinectes sapidus, one season
(mean number of crabs computed from monthly trawl and suction sampling data)

Grass Bed Relative Abundance Scale:  0 = no grass beds;  4 = most extensive grass beds


Station #1: Mouth of Chesapeake Bay

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.43
29.71
0
0
0
2
1
Apr - May
56.65
27.44
0
0
0
1
0
Jun - Aug
73.49
28.47
0
0
0
0
2
Sep - Nov
65.12
29.94
0
0
0
4
4


Station #2: Mouth of James River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
43.45
22.19
1
1
1
8
5
Apr - May
59.40
21.82
1
0
1
6
5
Jun - Aug
74.52
24.09
1
1
1
2
2
Sep - Nov
65.62
23.42
1
5
7
5
5


Station #3: James River at Hog Island

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
44.82
3.35
0
1
1
8
5
Apr - May
63.44
1.90
0
0
0
4
3
Jun - Aug
80.86
5.34
0
0
0
1
0
Sep - Nov
67.48
7.03
0
3
3
5
2


Station #4: Mouth of York River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
43.56
20.74
4
7
6
13
13
Apr - May
59.02
18.46
4
3
3
18
21
Jun - Aug
76.81
20.89
4
1
0
9
13
Sep - Nov
66.82
22.04
4
30
33
5
2


Station #5: Pamunkey River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
44.45
2.25
0
2
1
16
9
Apr - May
63.83
1.65
0
0
0
12
6
Jun - Aug
80.19
4.30
0
1
1
5
2
Sep - Nov
66.07
6.45
0
4
2
9
9


Station #6: Mouth of Rappahannock River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
42.40
17.09
0
2
0
12
10
Apr - May
59.36
14.35
0
0
0
9
6
Jun - Aug
78.12
16.26
0
0
0
3
1
Sep - Nov
65.43
18.65
0
8
8
2
0


Station #7: Bayside Eastern Shore

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
42.64
20.65
3
8
11
17
21
Apr - May
56.81
19.03
3
3
3
22
22
Jun - Aug
76.34
19.68
3
2
4
13
7
Sep - Nov
65.44
21.68
3
39
38
2
5


Station #8: Tangier Island

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.70
19.04
4
16
19
21
20
Apr - May
58.83
17.39
4
10
11
23
22
Jun - Aug
77.64
18.27
3
7
10
6
7
Sep - Nov
64.07
20.30
4
33
39
6
5


Station #9: Smith Island

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.51
17.76
4
18
15
16
19
Apr - May
58.22
16.48
4
9
7
21
28
Jun - Aug
78.29
16.88
3
2
3
8
11
Sep - Nov
64.73
18.84
4
31
33
6
6


Station #10: Mouth of Potomac River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.85
13.40
0
1
2
9
6
Apr - May
57.10
11.50
0
0
0
11
7
Jun - Aug
75.97
12.90
0
1
0
4
1
Sep - Nov
64.94
14.89
0
5
4
6
5


Station #11: Upriver Potomac

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.80
3.56
0
1
0
15
4
Apr - May
59.28
1.40
0
0
0
14
5
Jun - Aug
79.36
2.31
0
0
0
7
1
Sep - Nov
63.51
4.71
0
3
1
10
4


Station #12: Mouth of Choptank River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
40.86
13.77
0
0
0
17
7
Apr - May
58.53
11.94
0
0
0
19
9
Jun - Aug
77.74
11.97
0
0
0
10
5
Sep - Nov
63.15
14.70
0
1
1
14
5


Station #13: Mouth of Severn River

 
Water Temp (°F)

Salinity
(ppt)

Grassbed Rel. Abundance
Juveniles
<15 mm                            15-60 mm
     male         female         male             female 
Dec - Mar
41.38
14.50
0
0
0
12
3
Apr - May
53.15
11.99
0
0
0
13
3
Jun - Aug
73.79
13.00
0
0
0
9
2
Sep - Nov
65.90
15.55
0
0
0
13
4