Smooth Bottom Net Trawl Fishing Gear Effect on - New England ...

<strong>Trawl</strong>
Station
Results of 2002 REMOTS Surveys to Evaluate the <strong>Effect</strong>s
of <strong>Trawl</strong>ing on Soft-<strong>Bottom</strong> Habitat in Massachusetts Bay
Table 3.5-4.
Summary of REMOTS Sediment-Profile Imaging Results for the
Mud Hole <strong>Trawl</strong> Stations (top) and Control Stations (bottom), October 2002 Survey
(Unless otherwise indicated, values in this table are means for n=3 replicate images at each station)
Benthic Habitat
(# replicates)
Successional Stages
Present (# replicates)
RPD Mean
(cm)
1A 3 to 2 phi (3) 4.6 0.7 SA.F (3) ST I (3) 2.5 4.7
1B 4 to 3 phi (3) 7.5 0.6 UN.SS (3) ST I (3) 2.4 5.0
1C 4 to 3 phi (3) 9.3 0.8 UN.SI (1), UN.SS (2) ST I (2), ST I on III (1) 3.1 7.0
3A 4 to 3 phi (3) 6.6 0.6 UN.SI (1), UN.SS (2) ST I (3) 2.6 4.7
3B 4 to 3 phi (3) 7.5 0.7 UN.SI (1), UN.SS (2) ST I (3) 2.9 5.3
3C 3 to 2 phi (2), 4 to 3 phi (1) 7.1 0.9 UN.SS (3) ST I (2), ST I on III (1) 2.7 6.3
AVG 7.1 0.7 2.7 5.5
MAX 9.3 0.9 3.1 7.0
MIN 4.6 0.6 2.4 4.7
Control
Station
Grain Size Major
Mode (# replicates)
Camera
Penetration Mean (cm)
Boundary Roughness
Mean (cm)
2A 3 to 2 phi (2), 4 to 3 phi (1) 7.5 1.4 UN.SS (3) ST I (2), ST I on III (1) 2.6 6.3
2B 3 to 2 phi (1), 4 to 3 phi (2) 7.4 1.2 UN.SS (3) ST I (1), ST I on III (2) 2.8 8.0
2C 4 to 3 phi (3) 8.4 1.7 UN.SS (3) ST I (2), ST I on III (1) 3.3 7.3
4A 4 to 3 phi (3) 7.3 1.1 UN.SS (3) ST I (2), ST I on III (1) 2.2 5.7
4B 4 to 3 phi (3) 8.3 2.2 UN.SI (1), UN.SS (2) ST I (2), ST I to II (1) 2.5 5.0
4C 3 to 2 phi (1), 4 to 3 phi (2) 5.8 1.6 SA.F (1), UN.SS (2) ST I (3) 2.5 4.7
AVG 7.4 1.5 2.6 6.2
MAX 8.4 2.2 3.3 8.0
MIN 5.8 1.1 2.2 4.7
SAIC
Grain Size Major
Mode (# replicates)
Camera
Penetration Mean (cm)
Boundary Roughness
Mean (cm)
Benthic Habitat
(# replicates)
Successional Stages
Present (# replicates)
RPD Mean
(cm)
OSI Mean
OSI Mean