The Alaska Fisheries Science Center website is now part of the NOAA Fisheries website.
Some information may not be up to date. Join us at our new location,
Please contact with any questions.

link to AFSC home page
Mobile users can use the Site Map to access the principal pages

link to AFSC home page link to NMFS home page link to NOAA home page

Groundfish Assessment Program


Photo of a trawl net in the water
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.

  • 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

    • YEUNG, C., and D. W. COOPER. Contrasting the variability in spatial distribution of two juvenile flatfishes in relation to thermal stanzas in the eastern Bering Sea. ICES J. Mar. Sci. Early Online.   Online.
    • McCONNAUGHEY, R. A., J. G. HIDDINK, S. JENNINGS, C. R. PITCHER, M. J. KAISER, P. SUURONEN, M. SCIBERRAS, A. D. RIJNSDORP, J. S. COLLIE, T. MAZOR, R. O. AMOROSO, A. M. PARMA and R. HILBORN. 2019. Choosing best practices for managing impacts of trawl fishing on seabed habitats and biota. Fish Fish. Early Online.   Online.
    • STEVENSON, D. E., and R. R. LAUTH. 2019. Bottom trawl surveys in the northern Bering Sea indicate recent shifts in the distribution of marine species. Polar Biol. 42:407-421.  Online.
    • ZIMMERMANN, M., M. M. PRESCOTT, and P. J. HAEUSSLER. 2019. Bathymetry and geomorphology of Shelikof Strait and the Western Gulf of Alaska. Geosciences. 9:409.   Online.
    • Using Triggered Cameras to Determine Fish Behavior in Rocky, Untrawlable Areas
      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
      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.

    To view and print these documents, you must install Adobe Reader freeware.  Adobe also offers free tools for the visually disabled.

                | Home | Site Map | Contact Us | FOIA | Privacy | Disclaimer | | Accessibility | Print |           doc logo