August 8, 2018 — SEAFOOD NEWS –For the first time in 20 years, the small fleet of vessels harvesting golden king crab in the remote waters of the Aleutian Islands can take 3.9 million pounds of golden king crab east of Adak and 2.5 million pounds west of Adak, increases of 18 percent and 11 percent respectively over last year. The 9-month season opened last week under a management system that relies on data from federal observers and fishermen themselves.
This is good news for Adak marketers of golden king crab, who last year shipped live by air directly to Shanghai and this year want to expand the market.
Golden king crab, also called brown king crab, is found throughout Alaska but in highest numbers in the deep water in an 800-mile swath of ocean east and west of Adak, AK. The crab live in deeper waters than any other commercially harvested species in Alaska, and on rocky bottoms. Fishermen use pots that are set on a longline, a hybrid approach not used for any other crab.
The remote location of the fishery, the relatively small stock size, the difficult terrain, and the short window of good weather all made surveys problematic. Historically the fishery used triennial surveys with commercial vessels and commercial gear: crab pots on longlines.
But the cost was prohibitive for such a small fishery, so in 1996 ADF&G adopted a constant catch harvest policy which set a cap that could not be increased, even when catch data, such as Catch-per-unit-effort (CPUE) radically increased. The quota dropped occasionally in the past twenty years, but for the most part, it worked.
“It’s been quite successful,” said Mark Stichert, shellfish management coordinator for ADF&G in Kodiak. “We’ve not seen a closure in twenty years, we have a tremendous amount of stability in that fishery. We found a sweet spot; 3.3 million pouds in the east and 3 million pounds in the west turned out to be a pretty good ball park estimation of what we could catch from this stock.”
But when the fishery became rationalized in 2005, moving from a competitive, dangerous effort by 20-some vessels competing against each other in a short season, to a reduced fleet of about five boats, each with their own quota they can harvest over nine months.
Crab rationalization split the management between the federal managers, tasked with setting allowable biological catch (ABC) and overfishing limits (OFL), and the state managers who set the total allowable catch (TAC) and the season dates.
In order to set ABC and OFL limits the federal managers needed a stock assessment, which is usually based on surveys. In this case, the scientists worked on creating a stock assessment of golden king crab with the data they had, calculating the uncertainty limited data gives managers and running the model through the peer review process many times.
Finally last year, stock assessment model was approved by the North Pacific Council last year. The Alaska Board of Fish gave the state managers authority to increase the quota, but didn’t provide specific direction. The state managers needed to set a harvest policy.
“We’re taking a hybrid approach to partner with industry,” explained Stichert. “We have the benefit of working with a small fleet, we can all get in the same room together and find common objectives. What are your priorities? Do you want stability? We’re developing some exploitation rates to be reviewed.
In the process, the fleet has brought in their own stock assessment reviewers.
“We want a strategy that advances the science and allows us to make better decisions, but we don’t want to forget that we don’t know everything. We need a harvest strategy allows management to grow along with the improvements in data,” Stichert said. “It takes cooperation and committment.”
Since 2015, the fleet has worked with the state to conduct a hybrid survey on the eastern stock of golden king crab. The plan benefits both the managers and the harvesters. The first trip of the season will be a data collection effort using smaller mesh gear to catch sublegals, females, and males. The controlled catch will give managers information on recruitment, stock size and demographics.
“We’ll take care of the science if you take care of the gear,” Stichert said he told the fleet.
“On the very first trip you take, we’re going to tell you where to put the gear and we’re going to put out small mesh pots,” he said.
Meanwhile, Stichert said, “They get to sell the legal catch, the scientists onboard will document everything, then they’re off when the trip ends. The second trip they’re on their own.”
This week, the scientists are on crabbers fishing both eastern and western stocks for the first time. With the added information from both areas over time, the fishery could have the most data-rich management in its history.
The state approach will be reviewed by the Board of Fish for final approval later this year.
This story originally appeared on SeafoodNews.com, a subscription site. It is reprinted with permission.