Gear Selectivity Survey - Haddock

Cooperative Haddock/Atlantic Cod Separator Trawl Experiment (URI Sea Grant/Fishing Industry)

Haddock and cod associate in space and time in the waters of the northeast U.S. shelf. While haddock populations are healthy, Atlantic cod populations are severely depleted. Therefore, the challenge for fisherman is to harvest haddock while avoiding Atlantic cod. Haddock and Atlantic cod are known to behave differently to the approach of trawl gear, with haddock rising and cod diving.

This study was intended to evaluate the reduction of Atlantic cod bycatch while fishing for haddock with a modified trawl. This trawl was equipped with large mesh panels in the lower bellies. Two vessels were each equipped with both the experimental trawl and a control trawl. Side by side comparative tows were made, with each vessel switching between the two nets throughout each sampling day. Atlantic cod catch reductions were evaluated.

Data and Resources

Additional Info

Field Value
Last Updated June 21, 2019, 23:14
Created June 8, 2017, 22:40
access_constraints ["Access Constraints: User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. \n\nNEFSC Data Access Constraint:\nIf data is stored on an internal NEFSC network, the requester may not have direct access to query the data unless they are also authorized for network access. | Use Constraints: Acknowledgement of NOAA/NMFS/NEFSC, as the source from which these data were obtained in any publications and/or other representations of these, data is suggested."]
bbox-east-long -67.365783
bbox-north-lat 42.034
bbox-south-lat 40.657622
bbox-west-long -69.877133
coupled-resource []
dataset-reference-date [{"type": "publication", "value": ""}]
frequency-of-update asNeeded
guid gov.noaa.nmfs.inport:28032
licence ["NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose."]
metadata-date 2019-06-04T13:14:15
metadata-language eng
progress completed
resource-type dataset
responsible-party [{"name": "", "roles": ["pointOfContact", "custodian"]}]
spatial {"type": "Polygon", "coordinates": [[[-69.877133, 40.657622], [-67.365783, 40.657622], [-67.365783, 42.034], [-69.877133, 42.034], [-69.877133, 40.657622]]]}
spatial_harvester true