About the lab
The Division’s Age and Growth lab processes samples for determining the age of fish. These samples include scales, ear bones called otoliths, opercula, and fin spines. The age data from these samples are used to better understand fish populations, which in turn assists in stock management.
Fish lay down marks (called annuli) every year on their hard parts just like a tree does. Counting these rings allows us to determine the age of the fish. Each species of fish grows a little differently and may lay down better looking annuli on one hard part than another (i.e. otoliths vs. scales). Read our Technical Report on the fish aging protocols used in the lab.
The lab regularly processes age structures from:
- Blueback herring
- American shad
- Rainbow smelt
- Striped bass
- Winter flounder
- Black sea bass
- Summer flounder
The lab was established and constructed in 2009. Funding for the lab is provided through the Wallop-Breaux amendments of the Sport Fish Restoration Act.