Cooperative Research Paired Trawl Sweep Comparison Study
In the spring of 2009, Northeast Fisheries Science Center (NEFSC) replaced the previous standard bottom trawl gear (Yankee 36) with a new standard survey trawl designed in close collaboration with the fishing industry and local net manufacturers. Some stakeholders expressed concern that the rockhopper sweep introduced with this gear was not suitable for the efficient capture of flatfish and could therefore bias survey estimates. To address this question, a paired trawl experiment was conducted during the fall of 2009 and the spring and fall of 2010 aboard three chartered fishing vessels, the Mary K, the Moragh K, and the Endurance. The new standard survey trawl with rockhopper sweep was compared with an identical net with a 3” cookie sweep using paired tows between 2 vessels. Results in general showed significantly more flatfish caught with the cookie sweep, although differences in size distributions between the two sweeps were negligible in most cases.
Resources
4 resources available
-
27384_CooperativeResearchPairedTrawlSweepComparisonStudy.zip
ZIP -
SVDBS_SupportTables.zip
ZIP -
GCMD Keyword Forum Page
TEXT/HTML -
Full Metadata Record
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "Foley, Catherine",
"@type": "vcard:Contact",
"hasEmail": "mailto:catherine.foley@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | In the spring of 2009, Northeast Fisheries Science Center (NEFSC) replaced the previous standard bottom trawl gear (Yankee 36) with a new standard survey trawl designed in close collaboration with the fishing industry and local net manufacturers. Some stakeholders expressed concern that the rockhopper sweep introduced with this gear was not suitable for the efficient capture of flatfish and could therefore bias survey estimates. To address this question, a paired trawl experiment was conducted during the fall of 2009 and the spring and fall of 2010 aboard three chartered fishing vessels, the Mary K, the Moragh K, and the Endurance. The new standard survey trawl with rockhopper sweep was compared with an identical net with a 3” cookie sweep using paired tows between 2 vessels. Results in general showed significantly more flatfish caught with the cookie sweep, although differences in size distributions between the two sweeps were negligible in most cases. |
| distribution |
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27384_UNION_FSCS_SVCAT.csv
27384_UNION_FSCS_SVLEN.csv
27384_UNION_FSCS_SVSTA.csv",
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The compressed file contains the following comma delimited files:
SVDBS_CLOUD.csv
SVDBS_MATURITY_CODES.csv
SVDBS_SEX_CODES.csv
SVDBS_SVGEAR.csv
SVDBS_SVMSTRATA.csv
SVDBS_SVVESSEL.csv
SVDBS_WEATHER.csv
SVDBS_XBT.csv",
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"accessURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords",
"mediaType": "text/html",
"description": "Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords",
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|
| identifier | https://data.noaa.gov/waf/NOAA/nmfs/nefsc/iso/xml/27384.xml |
| keyword |
[
"3" cookie sweep",
"cooperative research",
"flatfish",
"paired trawl",
"rock hopper sweep",
"size distribution",
"2009",
"2010",
"Georges Bank",
"Gulf of Maine",
"Southern New England",
"benthic",
"demersal",
"DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
"Cooperative Research Surveys"
]
|
| landingPage | https://www.fisheries.noaa.gov/inport/item/27384 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2026-04-30T00:00:00.000+00:00 |
| publisher |
{
"name": "Northeast Fisheries Science Center",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, unclassified |
| spatial | -66.955583,41.108983,-70.865883,44.691317 |
| temporal | 2009-10-29T00:00:00+00:00/2010-11-03T00:00:00+00:00 |
| title | Cooperative Research Paired Trawl Sweep Comparison Study |
