| fid |
|
|
| OBJECTID |
|
|
| Set_ID___I |
Set_ID |
Identifier for individual trawl; year_season_trawl number |
| Season_Cod |
Season_Code |
Identifier for season (1 = spring, 2 = summer, 3 = fall) |
| Basin_Code |
Basin_Code |
Identifier for basin location (1 = south basin, 2 = narrows, 3 = north basin) |
| Trawl_num_ |
Trawl_num |
Trawl number in given year |
| Station_Co |
Station_Code |
Identifier code for Station (same as Station_Code_Table) |
| Trawl_type |
Trawl_type_code |
Numeric indicator for trawl type (1 = surface, 2 = mid, 3 = deep) |
| Water_dept |
Water_depth |
Water depth in meters, from the vessel's instrumentation |
| Line_out__ |
Line_out |
Amount of line used for deep trawls, in meters |
| Start_Date |
Start_DateTime |
Start Date Time for a trawl in seconds since January 1st, 1970 - requires conversion via [as.POSIXct(Start_DateTime, origin = "1970-01-01")] |
| End_DateTi |
End_DateTime |
End Date Time for a trawl in seconds since January 1st, 1970 - requires conversion via [as.POSIXct(Start_DateTime, origin = "1970-01-01")] |
| Start_lat_ |
Start_lat |
Starting latitude for a trawl in decimal degrees |
| Start_long |
Start_long |
Starting longitude for a trawl in decimal degrees |
| End_lat___ |
End_lat |
End latitude for a trawl in decimal degrees |
| End_long__ |
End_long |
End longitude for a trawl in decimal degrees |
| Trip_odome |
Trip_odometer |
Trip odometer in kilometers from GPS |
| Volume_m3_ |
Volume_m3 |
Volume of water sampled for a trawl (catch effort), estimated from the distance of the tow and the dimensions of the net opening |
| Wind_speed |
Wind_speed |
Wind speed in knots, from vessel's instrumentation |
| Wind_direc |
Wind_direction_compass |
Wind direction in degrees, from vessel's instrumentation |
| Ship_speed |
Ship_speed |
Velocity of vessel in knots, from the vessel's instrumentation |
| Air_temp_a |
Air_temp_at_trl |
Air temperature recorded during trawl in Celsius, from the vessel's instrumentation |
| SurfaceWat |
SurfaceWater_Temp_at_trl |
Surface water temperature during trawl in Celsius, from the vessel's instrumentation |
| Secchi_dep |
Secchi_depth |
Secchi depth in meters, recorded at each station |
| Flow_meter |
Flow_meter_start |
Record of water flow at the start of a trawl |
| Flow_met_1 |
Flow_meter_end |
Record of water flow at the end of a trawl |
| Samplers__ |
Samplers |
Initials of sampler(s) during the trawl |
| Comments__ |
Comments |
General comments from the trawl (equipment issues, weather, fish observations, etc.) |
| Valid_Traw |
Valid_Trawl |
Yes (Y) or No (N) |
| Invalid_Tr |
Invalid_Trawl_Explanation |
Explanation of why the trawl was deemed invalid, based on distance or path (a straight line is required to be valid) |
| X |
X |
UTM coordinates for the start of each trawl (UTM zone = 14, WGS84 datum, units = |
| Y |
Y |
UTM coordinates for the start of each trawl (UTM zone = 14, WGS84 datum, units = |
| Dist__m_ |
Dist |
Haversine distance measured from the starting location of the trawl to the mean station coordinates in meters |
| Dist_Outli |
Dist_Outlier |
A trawl is marked as an outlier (1) if the trawl's starting location is >10km from the mean station coordinates. |
| Station_La |
Station_Lat |
Station latitude in decimal degrees, derived from mean trawl start coordinates (same as in Station_Code_Table) |
| Station_Lo |
Station_Long |
Station longitude in decimal degrees, derived from mean trawl start coordinates (same as in Station_Code_Table) |
| Set_ID |
Set_ID |
ID of individual trawl the sample is from; year_season_trawl number |
| ID |
|
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