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Age and Growth Program

REFM Home

Age and Growth

FAQs

Species Aged

Procedures

Break and Burn

Thin Sectioning

Ageing Demo

Quality Control

Statistics

Otolith Database

Age Requests

Validation

Radiometrics

Bomb Radiocarbon

Other Validation

Resources

Recent Publications

Highlighted Species

Pollock

Pacific Cod

Skates

Shortraker rockfish

Age Validation

Fish ages generated from interpreting growth rings on otoliths are validated and corroborated at the AFSC Age and Growth Program using a variety of techniques including lead/radium radiometrics, bomb carbon, and various other techniques. For a quick summary of age validation and age corroboration carried out by the AFSC Age and Growth Program please see the Species Aged table.

**Age validation techniques**
Radiometrics	Bomb radiocarbon	Other
		Known Age Year classes Marginal Increment Analysis (MIA) Mark and recapture

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