The Otolith Research Laboratory of the Bedford Institute of Oceanography
Dartmouth, Nova Scotia, Canada has a excellent site with links to abstracts of their papers and to several European sites.
They also include detailed information on otolith ageing and sections from the book, SECOR, D.H., J. M. DEAN and S.E. CAMPANA
[ed]. 1995. Recent Developments in Fish Otolith Research. Univ. of South Carolina Press
. Columbia, S.C. 730 pp.