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.

Available to qualified researchers.

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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.

Oracle Database on Centralized Database Management System

Data validation during data collection using FSCS 1.6, Data auditing post-survey by established auditing routines, Data validation during database load

Archiving solution for Oracle Data Sets is yet to be determined

Archival of source data preserving unaltered collected data, Scheduled backups, Remote storage backups, Password protection

Vessel sensor data were collected electronically using SCS. Catch and biological data were collected electronically using FSCS 1.6. At the completion of the cruise, a database copy was inserted into the shoreside database.