Saving Seafood

UMass Dartmouth researchers developing open-source system for assessing fish movement

October 7, 2015 — UMass Dartmouth School for Marine Science & Technology (SMAST) Associate Professor Geoffrey Cowles is leading a collaborative research effort to develop geolocation methodologies to improve understanding of fish movement patterns of Atlantic cod, yellowtail flounder, and monkfish. The project will focus on the Gulf of Maine/Georges Bank and includes researchers from SMAST, Northeastern University, the Gulf of Maine Research Institute, the Massachusetts Division of Marine Fisheries, along with the fishing industry.

Geolocation, which is the process of taking data recovered from a fish archival tag and coming up with the best estimate of positions between release and recapture, can provide insights into catchability and fishery interactions. Using this technique, the research team will be able to guide behavior-dependent aspects of the model parameterization, as well as interpret the geolocated tracks. Researchers will also employ their collective skills in computer programming, oceanographic modeling, statistical analysis, and fisheries biology to assist in furthering the development of technology to geolocate fish.

This study will also use data acquired from previous studies on each of the example species, which all have their own characteristic behaviors and were tagged in different areas of the Gulf of Maine and Georges Bank region. Most studies of fish movements have relied on fishery recaptures of conventional tags, which provide only the locations of release and recapture. Such tagging studies may bias perceptions of movement patterns.

Archival tags, which are attached to fish internally or externally to record temperature and pressure at regular intervals, enable estimations of fish location while at large. This type of information is often not fully utilized due to the technical difficulties of producing such movement histories via geolocation techniques.

Read the full story at the New Bedford Standard- Times

 

NOAA issues report on at-sea monitors  

September 12, 2015 — The issue of at-sea monitoring seems to pervade almost every current discussion of the future viability of the Northeast groundfish industry, including the distribution of federal fishing disaster money and the ongoing battles over who will  pay for the monitoring program going forward.

NOAA Fisheries this week stepped further into that maelstrom with a largely internally generated report that focuses on cost comparisons between the current manual system of at-sea monitoring and electronic monitoring. It also released an independent review of the NOAA report.

The conclusions?

Electronic monitoring might be a more cost-effective option. Maybe. In some cases. Depending on the fishery and the goals and design of whatever electronic monitoring program ultimately is utilized.

The NOAA report, generated with the assistance of the Gulf of Maine Research Institute and other non-governmental organizations, concedes a wide array of assumptions — it is based on hypothetical Northeast multi-species and Atlantic herring and mackerel fisheries — and accepts that it is merely “a starting point for developing future [electronic monitoring] program designs.”

Read the full story at the Gloucester Daily Times