April 18, 2016 — Rotational area management is the cornerstone of U.S. sea scallop fisheries management; areas that contain beds of small scallops are closed before the scallops experience fishing mortality, then the areas re-open when scallops are larger, producing more yield-per-recruit. When scallop vessels are fishing in these areas they are limited in terms of total removal. The scallops are harvested for their mussel (“meats”) by being hand shucked at sea; the vast majority being landed iced.
There have been many issues associated with commercial fishing gear in recent years as we move towards more sustainable fisheries. Important objectives to scallop gear operations include increasing the size of scallops retained in the gear, preventing damage to scallops not ready for harvest, avoiding mortality to unwanted fish species, mitigating any adverse impact to habitat, and reducing risk to threatened and endangered species. Scallops are primarily harvested by dredges that sweep across the surface of the sea floor. Besides catching scallops, the gear also captures as a bycatch flatfish such as yellowtail flounder and winter flounder. Many of these flatfish stocks are in an overfished condition due to past heavy pressure from targeting fisheries and environmental change, including rising ocean temperatures. Reduction of bycatch in the scallop fishery has been accomplished by gear modifications, time/ area closures (e.g., seasonal restrictions), and the higher scallop catch per unit effort (CPUE) achieved by rotational management.
Another issue relates to the concerns that some stakeholders have about adverse impacts of scallop dredging on the habitat. While many studies indicate that fishing has relatively little long term impact on the types of high energy habitats scallops inhabit, management takes the precautionary approach of minimizing the swept area of the fishery. The 2016 projection for swept area is 3,600 square nautical miles. This is down from the 16,000 square nautical miles fished in the 1990’s, which produced substantially less yields — another major benefit of the rotational fishing strategy.
The scallop fishery also had an issue with the bycatch of loggerhead sea turtles in the mid-Atlantic; estimates suggested that the fishery killed or injured over 700 loggerheads in 2003 alone. The industry and its scientific partners have since developed gear solutions and now virtually no turtle mortality has been observed.
By solving issues related to scallop stock management, bycatch, habitat, and protected species, the U.S. scallop producers applied for and received the “Certified Sustainable Seafood” credential from the Marine Stewardship Council, aiding in the worldwide marketing of the U.S. sea scallop.
See the full story at the Northeast Agriculture Insights and Perspectives.