Groundfish Assessment Program

Research

Photo of a basket of fish and invertebrates

The AFSC Groundfish Assessment Program (GAP), in addition to regularly conducting bottom trawl surveys, also investigates biological processes and interactions with the environment to estimate growth, mortality, and recruitment to improve the precision and accuracy of forecasting stock dynamics.
Impacts of bottom trawls on the seafloor and the description of bottom type are also being studied in the Bering Sea and Aleutian Islands.

*Featured Items*

Alaska Bathymetry, Sediments, and Smooth Sheets Go there >>

Validating and improving species distribution models for structure forming invertebrates using an independent survey in the eastern Bering Sea. Go there >>

Is the survey selectivity curve for Pacific cod (Gadus macrocephalus) dome-shaped? Direct evidence from trawl studies. Go there >>

Recent Poster Presentations, Publications, Reports & Activities

CONRATH, C. L. 2017. Maturity, spawning omission, and reproductive complexity of deepwater rockfish. Trans. Am. Fish. Soc. 146:495-507. http://dx.doi.org/10.1080/00028487.2017.1285352 Online.
CONNER, J., D. G. NICHOL, and R. R. LAUTH. 2017. Results of the 2015 eastern Bering Sea continental shelf bottom trawl survey of groundfish and invertebrate resources. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-353,154 p. Online.
CONNER, J., and R. R. LAUTH. 2017. Results of the 2016 eastern Bering sea continental shelf bottom trawl survey of groundfish and invertebrate resources. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-352,159 p. Online.
WILBORN, R., C. CONRATH, B. KNOTH, and C. ROOPER. 2017. Results from the underwater camera survey of the 49 fathom pinnacle and snakehead bank sites near Kodiak Island, Alaska. AFSC Processed Rep. 2017-06, 75 p. Alaska Fish. Sci. Cent., NOAA, Natl. Mar. Fish. Serv., 7600 Sand Point Way NE, Seattle WA 98115 Online.
Using Triggered Cameras to Determine Fish Behavior in Rocky, Untrawlable Areas
By: KRESIMIR WILLIAMS, CHRIS ROOPER, MIKE LEVINE, ALEX De ROBERTIS
Conference: Western Groundfish Conference (19th), Newport, OR, Feb 2016
(2016 poster, .pdf, 468 KB) Online.
Introducing the Working Group on Maturity Assessment and Reproductive Variability of Life Stages
By: SUSANNE McDERMOTT, SANDI NEIDETCHER, CHRISTINA CONRATH, PAUL SPENCER
Conference: Western Groundfish Conference (19th), Newport, OR, Feb 2016
(2016 poster, .pdf, 1.85 MB) Online.

See the poster and publications databases for additional listings.

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