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Alaska Age and Growth Age Reading Interactive Demonstration

January 05, 2018

The is an interactive application used to determine the age of fish species. With this application, the user can click on the ageing structure image to flag growth rings, zoom and pan the ageing structure image, use a movable scale bar, and compare the user's age result with the experienced age reader's age.

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.

Demonstration Species List

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

Last updated by Alaska Fisheries Science Center on 07/14/2021

Age and Growth Research in Alaska Age and Growth Program