| CRD 04-11
Table 3: Categorical Variables Examined in an Analysis of
Factors Affecting Sea Turtle Bycatch in 2003 Mid-Atlantic Scallop Dredge
Fishery. Percentage of Observed Hauls in each category is also shown. |
| Variable |
Definition
(%Hauls) |
| Sea Surface Temperature |
Thi: 22°C - 26.5°C (43%)
Tlo: 7.6°C - 21.9°C (57%) |
| Season |
Spring: June (14%)
Summer: July-Oct (68%)
Fall: November (18%) |
| Depth |
Shallow: 2-26 fm (25%)
Mid-Depth: 27-31 fm (45%)
Deep: 32-60fm (30%) |
| Latitude Zone |
1: 37°N to 38.9°N (56%)
2: 39°N (39%)
3: 40°N (5%) |
| Inside/Outside Controlled Access Areas |
Inside (56%)
Outside (44%) |
| Vessel Length |
Small: 42-77 ft (18%)
Medium: 78-87 ft (45%)
Large: 88-109 ft (37%) |
| Tow speed |
Slow: 2.9-4.3 knots (34%)
Medium: 4.4-4.9 knots (54%)
Fast: 5.0-6.2 knots (12%) |
| Presence/Absence of Tickler Chains |
0: No chains (17%)
1: Chains (83%) |
| Presence/Absence of Rock Chains |
0: No chains (47%)
1: Chains (53%) |
| Number of Tickler Chains Used |
1: 0 or 1 Chain (44%)
2: 2 or 3 Chains (51%)
3: 4 to 6 Chains (5%) |
| Number of Rock Chains Used |
1: 0 Chains (47%)
2: 1-3 Chains (44%)
3: 4-11 Chains (9%) |
| Presence/Absence of a Pressure Plate |
0: No pressure plate (11%)
1: Pressure plate (85)%
9: Unknown (4%) |
| Frame Width of Dredge |
10 ft (2%)
11 ft (5%)
12 ft (1%)
13 ft (38%)
14 ft (16%)
15 ft (36%)
16 ft (2%) |
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