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

Age Reading Demonstration (ARD)

Want to try your hand at ageing fish bones? Try our latest interactive fish ageing program: ARD 2.0. To get started, click on the link to ARD 2.0 and select a species you want to start with to begin ageing. Then click on the otolith image where you see annular marks. Submit the marked image. ARD will automatically mark the image with marks from an experienced age reader, and compare your age with the experienced age reader's age.

The interactive program requires Adobe Flash player.


ARD Species List

  • Atka Mackerel
  • Dover Sole
  • Flathead Sole
  • Greenland Halibut
  • Pacific Cod
  • Pacific Ocean Perch
  • Sablefish
  • Walleye Pollock (GOA)
  • Yellowfin Sole

The original version of ARD is available for users without Adobe Flash: Click Here

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