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 3.5-5.
Summary of REMOTS Sediment-Profile Imaging Results for the
Little Tow <strong>Trawl</strong> Stations (top) and Control Stations (bottom), November 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 4 to 3 phi (3) 5.8 0.8 UN.SS (3) ST I (3) 2.0 4.3
1B 3 to 2 phi (1), 4 to 3 phi (2) 4.5 0.7 UN.SS (3) ST I (3) 2.5 5.0
1C 3 to 2 phi (2), 4 to 3 phi (1) 3.2 0.8 SA.F (1), UN.SS (2) ST I (3) 1.8 4.0
3A 4 to 3 phi (3) 8.9 1.4 UN.SI (1), UN.SS (2) ST I on III (1), ST I to II (2) 2.8 7.3
3B 2 to 1 phi (2), 3 to 2 phi (1) 2.7 3.3 SA.F (1), SA.M (2) INDET (2), ST I (1) 3.0 6.0
3C 3 to 2 phi (3) 2.1 0.6 SA.F (3) INDET (3) INDET INDET
AVG 4.5 1.3 2.4 5.3
MAX 8.9 3.3 3.1 7.3
MIN 2.1 0.6 1.8 4.0
Control
Station
Grain Size Major
Mode (# replicates)
Camera
Penetration Mean (cm)
Boundary Roughness
Mean (cm)
2A 3 to 2 phi (1), 4 to 3 phi (2) 7.6 1.1 UN.SI (1), UN.SS (2) ST I (2), ST I on III (1) 2.7 6.3
2B 3 to 2 phi (3) 3.6 1.0 SA.F (3) ST I (3) 2.0 4.0
2C 3 to 2 phi (1), 4 to 3 phi (2) 5.5 1.2 SA.F (1), UN.SS (2) ST I (2), ST I on III (1) 2.8 6.3
4A 3 to 2 phi (3) 4.1 1.9 SA.F (2), UN.SS (1) ST I (3) 2.1 4.0
4B 2 to 1 phi (3) 3.3 5.3 SA.M (3) ST I (3) 3.4 6.0
4C 2 to 1 phi (1), 3 to 2 phi (2) 3.2 2.5 SA.F (3) ST I (3) 3.1 5.7
AVG 4.5 2.2 2.7 5.4
MAX 7.6 5.3 3.4 6.3
MIN 3.2 1.0 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