i
Assessment of the deepwater flatfish stock complex in the Gulf of Alaska
-
2017
Details:
-
Alternative Title:GOA Chapter 5
-
Personal Author:
-
NOAA Program & Office:
-
Description:The Gulf of Alaska deepwater flatfish complex (consisting of Dover sole, Greenland turbot, and deepsea sole) is assessed every four years and was last assessed in 2015. In other years, we present an executive summary to recommend harvest levels for the next two years. Please refer to the 2015 full stock assessment report for further information regarding the assessment model (McGilliard and Palsson, 2015, available online at http://www.afsc.noaa.gov/REFM/Docs/2015/GOAdeepflat.pdf). A full stock assessment document with updated assessment and projection model results will be presented in 2019. Dover sole is assessed using an age-structured model and Tier 3 determination. Thus, the single species projection model was run using parameter values from the accepted 2015 Dover sole assessment model (McGilliard and Palsson 2015), together with updated catch information for 2015-2017, to predict stock status for Dover sole in 2018 and 2019 and to make ABC recommendations for those years. Projections are conducted using numbers-at-age for Dover sole from age 3-59+ and historical recruitment of age 3 individuals is used to calculate OFL’s and ABC’s. Greenland turbot and deepsea sole fall under Tier 6. ABC’s and OFL’s for Tier 6 species are based on historical catch levels (average catch over the years 1978-1995) and therefore these quantities cannot be updated. ABC’s and OFL’s for the individual species in the deepwater flatfish complex are determined only as an intermediate step for the purpose of calculating complex-level OFL’s and ABC’s.
-
Keywords:
-
Series:
-
Document Type:
-
Place as Subject:
-
Rights Information:Public Domain
-
Compliance:Submitted
-
Main Document Checksum:urn:sha256:d23072408b54b23e147ecec122e42b5d1d32b9648ea24ae53872b8172ec7643f
-
File Type:
Supporting Files
-
No Additional Files
More +
Related Documents
-
Personal Author:Hanselman, Dana H. ;Rodgveller, Cara J....2017 | Gulf of Alaska Stock AssessmentsDescription: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 wa...Personal Author:Spies, Ingrid ;Nichol, Dan...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Tribuzio, Cindy A. ;Echave, Katy...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Turnock, Benjamin J. ;McGilliard, Carey R....2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Turnock, Benjamin J. ;Bryan, Meaghan...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Ormseth, Olav A. ;Conners, M.Elizabeth2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Fenske, Kari H. ;Lunsford, Chris R....2017 | Gulf of Alaska Stock AssessmentsDescription:In 2017, the scheduled frequency for some stock assessments was changed in response to the National Stock Assessment Prioritization effort. Prior to 2...Personal Author:Hanselman, Dana H. ;Shotwell, S. Kalei...2017 | Gulf of Alaska Stock AssessmentsDescription:The scheduled frequency for some stock assessments was recently changed in response to the National Stock Assessment Prioritization effort (Methot 201...Personal Author:Spies, Ingrid ;Aydin, Kerim...2017 | Gulf of Alaska Stock AssessmentsDescription:Arrowtooth flounder biomass estimates in the current model have changed relative to the projection model estimates in 2016. The model projection of sp...Personal Author:Tribuzio, Cindy A. ;Echave, Katy...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:McGilliard, Carey R. ;Palsson, Wayne2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Echave, Katy ;Hulson, Peter-John2017 | Gulf of Alaska Stock AssessmentsDescription:Gulf of Alaska rockfish are assessed on a biennial stock assessment schedule. For this on-cycle year, we incorporate new survey biomass. Following the...Personal Author:Dorn, Martin ;Aydin, Kerim...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Olson, Andrew ;Stahl, Jennifer...2017 | Gulf of Alaska Stock AssessmentsDescription: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...Personal Author:Hulson, Peter-John ;Hanselman, Dana H....2017 | Gulf of Alaska Stock AssessmentsDescription: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...
More +
You May Also Like
Corporate Authors:
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...
Personal Author:
Hanselman, Dana H. ;
Rodgveller, Cara J.
...
2017 | Gulf of Alaska Stock Assessments
Description:
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 wa...
Checkout today's featured content at repository.library.noaa.gov