Committee of Age Reading Experts

Ageing Manual

The Manual On Generalized Age Determination Procedures For Groundfish (posted 10/2006) is available in PDF (2.1 MB) and MS Word format (6.9 MB).


The manual was prepared by C.A.R.E. (Committee of Age Reading Experts) Pacific Coast Groundfish Ageing Technicians under the sponsorship of the Pacific States Marine Fisheries Commission for the Technical Subcommittee of The Canada/U.S. Groundfish Committee,  May 2000.


Topics include:  international birthdate, age validation, otolith storage, clearing of otoliths, inter-agency age calibration exchange mechanism, edge type, rockfish (Sebastes) ageing procedures, sablefish (Anoplopoma fimbria) ageing procedures, glossary, and references.