October 4th, 2016 — Most of the reporting in the media about commercial fishing and declining stocks in the Northeast dwells on how dire the situation has become with the fault generally attributed to fishermen and “overfishing.”
The view on the waterfront is very different, however. Fishermen have long maintained that there is a huge disconnect between what they see on the water and the conclusions derived from the surveys and stock assessments made by the National Oceanaic and Atmospheric Administration. Their claims have been dismissed as self-serving. Now it seems the fishermen have a strong case. On a recent bottom trawl survey, a typical industry net caught four times as many flatfish as the rig used on the government trawl surveys.
For years, fishermen have clamored for more collaborative research using industry vessels. They were largely ignored. But in August, Dr. Bill Karp, director of the Northeast Fisheries Science Center in Woods Hole, revealed a plan for NOAA Fisheries to shift all or part of its trawl surveys from its research vessel, the Henry B. Bigelow, to commercial fishing boats. At the same time, from Aug. 7-21 the Point Judith fishing vessel Karen Elizabeth was at sea conducting a twin-trawl survey on behalf of the Science Center with a team of scientists working alongside the crew.
The boat was rigged to tow two nets simultaneously, each of the type used on the Bigelow, with one significant difference. One net was fitted with a rockhopper and the other had a chain sweep. Because different fish species behave differently, fishermen use a chain sweep, attached to the leading edge of the net and in contact with the sea floor, when targeting flatfish such as witch flounder. These fish hide in the sediment on soft bottom to evade predators. You will hear fishermen refer to fishing boats with rockhoppers as “hard bottom boats” because those boats typically go after other species such as cod and haddock which tend to be found over rocky or gravel bottom.
The Bigelow uses a rockhopper on every tow, despite surveying in our multispecies fishery. That is because this gear allows nets to be towed across a variety of habitats. A net equipped with a chain sweep is prone to snag on a rocky bottom. Its exclusive use of a rockhopper has been a point of contention with the fishermen since the Bigelow commenced operations in these waters. Fishermen openly questioned its accuracy in estimating flatfish abundance. The survey work on the Karen Elizabeth has provided the evidence that their skepticism is well founded. Here are some relevant quotes taken from the Science Center’s own paper, authored by the scientists who were on the Karen Elizabeth to conduct the study:
“On average, catch rates in the experimental chain sweep gear were about 4-fold the catch rates of the rockhopper sweep gear used on the standard survey.”
Read the full opinion piece at The New Bedford Standard-Times