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 3.5-3.
Summary of REMOTS Sediment-Profile Imaging Results for the
Little Tow <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)
1A 3 to 2 phi (1), 4 to 3 phi (2) 4.2 1.9 SA.F (1), UN.SS (2) ST I (3) 2.1 4.3
1B 3 to 2 phi (1), 4 to 3 phi (2) 5.7 1.1 UN.SI (1), UN.SS (2) ST I (1), ST I on III (2) 2.1 7.0
1C 3 to 2 phi (1), 4 to 3 phi (2) 2.9 1.4 SA.F (2), UN.SS (1) INDET (1), ST I (2) 1.0 2.5
3A 4 to 3 phi (3) 7.8 1.4 UN.SI (1), UN.SS (2) ST I (2), ST I on III (1) 2.8 6.3
3B 2 to 1 phi (3) 4.0 0.8 SA.M (3) ST I (2), ST I to II (1) 2.1 4.7
3C 3 to 2 phi (3) 4.2 0.9 SA.F (3) ST I (3) 1.4 3.3
AVG 4.8 1.2 1.9 4.7
MAX 7.9 1.9 2.8 7.0
MIN 3.0 0.8 1.0 2.5
Control
Station
Grain Size Major
Mode (# replicates)
Camera
Penetration Mean (cm)
Boundary Roughness
Mean (cm)
Benthic Habitat
(# replicates)
Successional Stages
Present (# replicates)
RPD Mean
(cm)
2A 4 to 3 phi (3) 8.0 1.5 UN.SS (3) ST I (3) 2.9 5.3
2B 3 to 2 phi (3) 3.4 0.7 SA.F (2), UN.SS (1) INDET (1), ST I to II (2) 2.4 5.5
2C 4 to 3 phi (3) 5.9 2.7 UN.SS (3) ST I on III (2), ST I to II (1) 2.1 7.3
4A 3 to 2 phi (2), 4 to 3 phi (1) 5.3 1.4 SA.F (2), UN.SS (1) ST I (3) 1.9 4.5
4B 2 to 1 phi (1), 3 to 2 phi (2) 2.8 0.9 SA.F (2), SA.M (1) INDET (2), ST I (1) 2.2 4.0
4C 2 to 1 phi (2), 3 to 2 phi (1) 3.6 1.1 SA.F (1), SA.M (2) ST I (3) 2.4 4.7
AVG 4.8 1.4 2.3 5.2
MAX 8.0 2.7 2.9 7.3
MIN 2.8 0.7 2.0 4.0
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