Northwest Fisheries Science Center

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Document Type: Chapter or Section
Center: NWFSC
Document ID: 7811
Type of Book: Technical
Section or Chapter Title: Identification of stocks of Pacific salmon by means of scale features
Book Title: The stock concept in Pacific salmon. Papers presented at the stock identification workshop, 8 April 1970, Seattle, Washington
Author: Richard L. Major, Kenneth H. Mosher, James E. Mason
Editor: Raymond C. Simon, Peter Anthony Larkin (Eds.)
Publication Year: 1972
Publisher: University of British Columbia Press, Vancouver
Pages: 209-231

The scales of Pacific salmon (Oncorhynchus spp.) hold an impressive amount of information.  Their surfaces bear a sculptured record of the growth experience of the individual fish.  Properly interpreted, this record enables us to determine the age and the area of origin of the fish.  It is our objective here to:  (1) show the features of salmon scales and their relation to the life history of the different species; (2) outline the methods for collecting, preparing, analyzing, and interpreting the scales of Pacific salmon; (3) survey the methods in which data derived from scales have been used to identify stocks of Pacific salmon; and (4) discuss the future of scale analysis in stock identification and other studies.