Dataset: Tow log and catch data
Deployment: Elizabeth_and_Katherine-trip4

Tow log

Principal Investigator:

Emerson C Hasbrouck (Cornell University, Cornell)

Contact:

Kristin Gerbino (Cornell University, Cornell)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Small Mesh Fishery Bycatch Reduction in the Southern New England/Mid-Atlantic Windowpane Flounder Stock Area (Windowpane Bycatch)

Version:

Data URL:

https://www.bco-dmo.org/dataset-deployment/685145/data

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Description

Methods & Sampling

Dataset acquisition description

Hauls were made in southern New England marine waters encompassing approximately 2000 square miles extending from Point Judith, RI in the west to Martha’s Vineyard, MA in the east and extending south to include Rhode Island Sound and portions of the Atlantic Ocean.

The methodology is available in the final report (pdf). See Supplemental Files section.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- reduced number of significant digits of weights (wgt_fish_avg) due to sampling precision methods

More information about this dataset deployment

Funding

Award Number	Funding Source
15-033	NorthEast Consortium

Instruments

Otter Trawl

Supplied Name:

Supplied Description:

See final report for full description of these net systems.

Instrument Type

Generic Name: Otter Trawl

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/61/

Generic Description:

Otter trawls have large rectangular otter boards which are used to keep the mouth of the trawl net open. Otter boards are made of timber or steel and are positioned in such a way that the hydrodynamic forces, acting on them when the net is towed along the seabed, pushes them outwards and prevents the mouth of the net from closing. The speed that the trawl is towed at depends on the swimming speed of the species which is being targeted and the exact gear that is being used, but for most demersal species, a speed of around 4 knots (7 km/h) is appropriate. More: http://en.wikipedia.org/wiki/Bottom_trawling

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
trip	trip number	unitless	cruise_id
tow	tow number	unitless	tow
vessel	vessel name	unitless	ship
boat_position	boat position relative to other vessel and shore: IN or OUT	unitless	no_bcodmo_term
treatment	Control net or net with large mesh belly panel	unitless	treatment
date	tow date	unitless	date
time_start	tow start time	unitless	time_start
time_end	tow end time	unitless	time_end
lat_start	latitude at start; north is positive	decimal degrees	lat_start
lon_start	longitude at start; east is positive	decimal degrees	lon_start
lat_end	latitude at end	decimal degrees	lat_end
lon_end	longitude at end	decimal degrees	lon_end
depth_w_start	water depth at start	fathoms	depth_w
depth_w_haulback	water depth at haul back	fathoms	depth_w
speed	tow speed	knots	no_bcodmo_term
gear_len_fa	ground gear length (legs/ground cable)	fathoms	no_bcodmo_term
len_tow_cable_fa	tow cable length	fathoms	no_bcodmo_term
door_spread_start_fa	door spread at tow start	fathoms	no_bcodmo_term
door_spread_end_fa	door spread at tow end	fathoms	no_bcodmo_term
tow_dir	tow direction: heading	unitless	no_bcodmo_term
area	statistical area: nmfs defined areas	unitless	no_bcodmo_term
scup_catch_lb	scup lbs: total catch of scup in lbs	pounds	weight
scup_wgt	scup individual fish weight: lbs calculated from length frequency tab	pounds	weight
scup_count	scup count: number of individual scup	fish	count
windowpn_catch_lb	windowpane pounds: total lbs caught of windowpane flounder	pounds	weight
windowpn_wgt	wp individual fish weight: lbs calculated from length frequency tab	pounds	weight
windowpn_count	windowpane count: number of individual windowpane flounder	fish	count
fluke_catch_lb	total weight of each fish species caught in net	pounds	weight
winterfl_catch_lb	total weight of each fish species caught in net	pounds	weight
yelltail_catch_lb	total weight of each fish species caught in net	pounds	weight
fourspot_catch_lb	total weight of each fish species caught in net	pounds	weight
butterfi_catch_lb	total weight of each fish species caught in net	pounds	weight
loligo_catch_lb	total weight of each fish species caught in net	pounds	weight
whiting_catch_lb	total weight of each fish species caught in net	pounds	weight
ling_catch_lb	total weight of each fish species caught in net	pounds	weight
skate_catch_lb	total weight of each fish species caught in net	pounds	weight
dogfish_catch_lb	total weight of each fish species caught in net	pounds	weight
monk_catch_lb	total weight of each fish species caught in net	pounds	weight
scallop_catch_lb	total weight of each fish species caught in net	pounds	weight
searobin_catch_lb	total weight of each fish species caught in net	pounds	weight
blakbass_catch_lb	total weight of each fish species caught in net	pounds	weight
bluefish_catch_lb	total weight of each fish species caught in net	pounds	weight
striper_catch_lb	total weight of each fish species caught in net	pounds	weight
weakfish_catch_lb	total weight of each fish species caught in net	pounds	weight
horseshoe_catch_lb	total weight of each fish species caught in net	pounds	weight
rockcrab_catch_lb	total weight of each fish species caught in net	pounds	weight
torp_ray_catch_lb	total weight of each fish species caught in net	pounds	weight
lobster_catch_lb	total weight of each fish species caught in net	pounds	weight
triggerfi_catch_lb	total weight of each fish species caught in net	pounds	weight
bonito_catch_lb	total weight of each fish species caught in net	pounds	weight
total_catch_lb	total catch weight	pounds	weight

Database

Contribute Data

Dataset: Tow log and catch data
Deployment: Elizabeth_and_Katherine-trip4

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Tow log and catch dataDeployment: Elizabeth_and_Katherine-trip4

Dataset acquisition description

Dataset Processing Description

Dataset: Tow log and catch data
Deployment: Elizabeth_and_Katherine-trip4