May 12, 2016 — The following is an excerpt from a story published today by the Boston Globe.
NEWPORT, R.I. – Even before mechanics found deeply pitted bearings near crankshafts in its generators, problems that could have led to catastrophic engine failure, the Henry B. Bigelow was running more than a month behind.
Now, the government research vessel is embarking on its annual spring voyage later than ever before, a delay that could have serious consequences for scientists’ ability to assess the health of some of the 52 fish stocks they survey, from the waters off North Carolina to the eastern reaches of the Gulf of Maine.
Fish migrate and change their feeding patterns as waters warm, which might make it difficult for National Oceanic and Atmospheric Administration scientists to compare this spring’s survey of fish populations with previous counts.
The prospect of skewed data could complicate efforts for policy makers to set proper quotas, potentially leading either to overfishing or unnecessarily strict catch limits.
“I worry that this will create statistical noise and more uncertainty,” said Gary Shepherd, a fishery biologist at NOAA’s Northeast Fisheries Science Center in Woods Hole, where he and other scientists recommend quotas based on what the Bigelow catches, along with other data.
As the waters warm, some of the fish, such as herring, migrate out of the survey area and into the region’s rivers. Other species, such as squid, which are short-lived, might not survive in representative numbers through June, when the Bigelow is now scheduled to finish its survey.
“If the survey had started at its normal time, it would have found squid on the continental shelf,” said Robert Vanasse, executive director of Saving Seafood, a Washington-based group that represents the fishing industry. “But now it won’t because the survey doesn’t sample Nantucket Sound.”