September 21, 2023 — The following was released by NOAA Fisheries:
This is the third year of a successful pilot project in the Gulf of Alaska. NOAA Fisheries scientists, academic scientists at Alaska Pacific University’s FAST lab, and rockfish fishermen are working together to provide survey data in formerly inaccessible rocky areas of the Gulf. Called the Science/Industry Rockfish Research Collaboration in Alaska (SIRRCA), the team collected a variety of data on several species of rockfish. There is little data available for some of these species.
In the Gulf of Alaska, there are more than 30 species of rockfish. The focus of this study is on Pacific ocean perch, dusky rockfish, and northern rockfish.
Based on previous NOAA Fisheries annual surveys, Pacific ocean perch numbers have increased in recent years. Dusky and northern rockfish numbers have been low. However, the habitats of all three of these species include rough, rocky areas, which are inaccessible to the NOAA Fisheries bottom trawl survey gear. This makes it difficult to get complete data on these populations. These hard-to-reach areas make up about 18 percent of the Gulf of Alaska seafloor. By working with fishermen, the science team was also able to collect needed biological information on fish condition (i.e., length, weight) for stock assessments.
Limited Data can Limit Fishing Opportunities
For dusky and northern rockfish, data from the bottom trawl survey is limited. This leads to greater uncertainty in the assessment models. When models are less precise, management measures require a much more conservative approach to prevent overfishing the fish stocks. If these stocks are healthy, this precautionary management may limit sustainable fishing opportunities.
“Sampling these rocky areas is necessary to improve our understanding of rockfish distribution and abundance and provide more accurate stock assessments so resource managers can set sustainable fishing quotas,” said Dr. Madison Hall, fisheries biologist, Alaska Fisheries Science Center who is leading the effort. “Our fishing industry partners involved in SIRRCA are fully invested in this effort to advance sustainable management for these long-lived, late maturing rockfish species. They recognize that collecting SIRRCA data and improving assessment models may ultimately increase or decrease fishing opportunities (via higher or lower fishing quotas) depending on model outcome. Better models means better management, and good management is important for sustaining both the fishery and the fish populations in the long-run. We are all on the same page about that.”