Dataset: Tow log and catch data

Name: Tow log and catch for study of windowpane flounder catch using scup gear and a Large Mesh Belly Panel (LMBP), October 2015 (Windowpane Bycatch project)
Published: 2017-03-16
Keywords: biota, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.685079.1

Spatial Extent: N:41.333 E:-70.667 S:40.833 W:-71.5

Temporal Extent: 2015-10-15

Project:

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

Program:

NorthEast Consortium (NEC)

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)

Version:

Version Date:

2017-03-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Tow log and catch for study of windowpane flounder catch using scup gear and a Large Mesh Belly Panel (LMBP), October 2015 (Windowpane Bycatch project)

Abstract:

This dataset reports the cruise metadata, gear deployment information as well as the weights for the species caught in each haul. Data was collected from paired tows to determine if a large mesh belly panel effectively reduces the catch of windowpane flounder in the small mesh scup fishery with existing gear and fishing practices. The data was analyzed to determine the statistical level of difference between the control and experimental nets for the targeted scup catch and for the windowpane flounder catch, should a difference exist.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2017-03-16	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.685079.1	2021-03-03

Methods & Sampling

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

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

Data Files

File
tow_log.csv (Comma Separated Values (.csv), 20.98 KB) MD5:dde24c0356cf7e0218f33473bae3cf4d Primary data file for dataset ID 685079

Supplemental Files

File

Small Mesh Fishery Bycatch Reduction in the Southern New England/Midatlantic Windowpane Stock Area
filename: CCE_Windowpane_Scup_Final_Report_111516.pdf

(Portable Document Format (.pdf), 4.83 MB)
MD5:ca92acdd509050168719dff5050eee77

A Final Report to The Northeast Consortium and The New England Fishery Management Council Groundfish Research Program Agreement No. 15-033 Period of Performance: 3/1/15 – 8/31/16

More Information about this dataset

Funding Sources

Funding Source	Award Number
NorthEast Consortium	15-033

Deployments

Deployment	Start Date	Platform	Investigator
Elizabeth_and_Katherine-trip1	2015-10-07	F/V Elizabeth & Katherine	Steve Arnold (Captain)	data info
Elizabeth_and_Katherine-trip2	2015-10-15	F/V Elizabeth & Katherine	Steve Arnold (Captain)	data info
Elizabeth_and_Katherine-trip3	2015-10-18	F/V Elizabeth & Katherine	Steve Arnold (Captain)	data info
Elizabeth_and_Katherine-trip4	2015-10-21	F/V Elizabeth & Katherine	Steve Arnold (Captain)	data info
Sea_Breeze_Too-trip1	2015-10-07	F/V Sea Breeze Too	Phillip Ruhle (Captain)	data info
Sea_Breeze_Too-trip2	2015-10-15	F/V Sea Breeze Too	Phillip Ruhle (Captain)	data info
Sea_Breeze_Too-trip3	2015-10-18	F/V Sea Breeze Too	Phillip Ruhle (Captain)	data info
Sea_Breeze_Too-trip4	2015-10-21	F/V Sea Breeze Too	Phillip Ruhle (Captain)	data info

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

Date and time formats are described in python strftime() syntax.

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

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Dataset: Tow log and catch data