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Table 5.1. Number of studies included in this review, by gear and substrate type. (PR = peer-reviewed; NPR = non-peer-reviewed.)
| Gear |
Substrate |
1990-2002 |
Pre-1990 |
Total |
| PR |
NPR |
Total |
PR |
NPR |
Total |
| Otter Trawls |
Mud |
9 |
2 |
11 |
0 |
0 |
0 |
11 |
| Sand |
10 |
2 |
12 |
1 |
0 |
1 |
13 |
| Gravel/Rock |
2 |
0 |
2 |
1 |
0 |
1 |
3 |
| Mixed |
1 |
1 |
2 |
0 |
1 |
1 |
3 |
| All |
22 |
5 |
27 |
2 |
1 |
3 |
30 |
| NB Scallop Dredges |
Sand |
3 |
0 |
3 |
0 |
0 |
0 |
3 |
| Mixed |
1 |
0 |
1 |
2 |
0 |
2 |
3 |
| All |
4 |
0 |
4 |
2 |
0 |
2 |
6 |
| Toothed Scallop Dredges |
Sand |
6 |
0 |
6 |
0 |
1 |
1 |
7 |
| Biogenic |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
| Mixed |
6 |
1 |
7 |
1 |
0 |
1 |
8 |
| All |
13 |
1 |
14 |
1 |
1 |
2 |
16 |
| Hydraulic Clam Dredges |
Mud |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
| Sand |
4 |
1 |
5 |
2 |
1 |
3 |
8 |
| Biogenic |
0 |
1 |
1 |
0 |
1 |
1 |
2 |
| Mixed |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
| All |
5 |
2 |
7 |
2 |
3 |
5 |
12 |
| Other Dredge |
Biogenic |
2 |
1 |
3 |
1 |
0 |
1 |
4 |
| Multiple Gears |
Sand |
2 |
1 |
3 |
0 |
0 |
0 |
3 |
| Gravel/Rock |
2 |
0 |
2 |
0 |
0 |
0 |
2 |
| Mixed |
2 |
1 |
3 |
3 |
0 |
3 |
6 |
| All |
7 |
1 |
8 |
3 |
0 |
3 |
11 |
| Lobster Pots |
Mixed |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
| |
|
|
|
|
|
|
|
|
| Total |
All |
53 |
11 |
64 |
11 |
5 |
16 |
80 |
|