The longline survey abundance index increased 14% from 2016 to 2017 following a 28% increase in 2016 from 2015. The lowest point of the time series was 2015. The fishery abundance index decreased 23% from 2015 to 2016 and is the time series low (the 2017 data are not available yet). There was a new Gulf of Alaska (GOA) trawl survey in 2017 which increased 89% from 2015 to 2017. Spawning biomass is projected to increase rapidly from 2018 to 2022, and then stabilize. Sablefish are managed under Tier 3 of NPFMC harvest rules. Reference points are calculated using recruitments from 1977-2013. The updated point estimates of B40%, F40%, and F35% from this assessment are 98,332 t (combined across the EBS, AI, and GOA), 0.096, and 0.114, respectively. Projected female spawning biomass (combined areas) for 2018 is 88,928 t (90% of B40%, or B36%), placing sablefish in subtier “b” of Tier 3. The maximum permissible value of FABC under Tier 3b is 0.086, which translates into a 2018 ABC (combined areas) of 25,583 t. The OFL fishing mortality rate is 0.102 which translates into a 2018 OFL (combined areas) of 30,211 t. Model projections indicate that this stock is not subject to overfishing, overfished, nor approaching an overfished condition.
The Gulf of Alaska (GOA) northern and southern rock sole assessment has been moved to a 4-year assessment cycle per the stock assessment prioritizatio...
The estimated 2018 total sculpin complex biomass in the GOA is 33,134 t. This represents a small decrease from the last full assessment in 2015. The r...
The shark complex (spiny dogfish, Pacific sleeper shark, salmon shark and other/unidentified sharks) in the Gulf of Alaska (GOA) is assessed on a bien...
Summary of Changes in Assessment Inputs: 1) 2016-2017 catch data were added to the model and 2015 catch was updated to include October to December cat...
Survey abundance estimates for the shallow-water complex were higher in 2017 compared to 2015 for all species except Yellowfin sole and Butter sole. T...
At least seven species of octopus are found in the Gulf of Alaska (GOA). For management purposes, all octopus species are grouped into a single assemb...
In 2017, the scheduled frequency for some stock assessments was changed in response to the National Stock Assessment Prioritization effort. Prior to 2...
The scheduled frequency for some stock assessments was recently changed in response to the National Stock Assessment Prioritization effort (Methot 201...
Arrowtooth flounder biomass estimates in the current model have changed relative to the projection model estimates in 2016. The model projection of sp...
The Other Rockfish (OR) complex (Table 16.1 and Figure 16.1) in the Gulf of Alaska (GOA) is assessed on a biennial stock assessment schedule to coinci...
Gulf of Alaska (GOA) Atka mackerel have been moved to a biennial stock assessment schedule to coincide with the availability of new survey data from t...
A full, age-structured assessment is presented for GOA rex sole. In previous years, the biomass estimates of the assessment were used to calculate OFL...
Gulf of Alaska rockfish are assessed on a biennial stock assessment schedule. For this on-cycle year, we incorporate new survey biomass. Following the...
The base model projection of female spawning biomass in 2018 is 342,683 t, which is 57.5% of unfished spawning biomass (based on average post-1977 rec...
Squids in the Gulf of Alaska (GOA) are managed as a single stock complex comprising approximately 15 species. Historically squids were managed as part...
There are currently no target fisheries for skates in the Gulf of Alaska (GOA), and directed fishing for skates is prohibited. Incidental catches in o...
The National Standard Guidelines for Fishery Management Plans published by the National Marine Fisheries Service (NMFS) require that a stock assessmen...
The results of a preliminary statistical age-structured assessment model (ASA) are not presented this year due to personnel changes. The ASA will be p...
Pacific ocean perch in the Gulf of Alaska are assessed on a biennial stock assessment schedule to coincide with the availability of new survey data. F...
The Gulf of Alaska deepwater flatfish complex (consisting of Dover sole, Greenland turbot, and deepsea sole) is assessed every four years and was last...
North Pacific Fishery Management Council. Plan Team for the Groundfish Fisheries of the Gulf of Alaska
2016 | Gulf of Alaska Stock Assessments
Description:
The demersal shelf rockfish (DSR) complex (yelloweye, quillback, copper, rosethorn, canary, China, and tiger rockfish) is assessed on a biennial cycle...
The Gulf of Alaska (GOA) northern and southern rock sole assessment has been moved to a 4-year assessment cycle per the stock assessment prioritizatio...
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