Northwest Fisheries Science Center

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Document Type: Report
Center: NWFSC
Document ID: 7886
Title: Marking sockeye salmon scales by short periods of starvation
Author/Editor: Richard L. Major, Donovan R. Craddock
Year: 1962
Institution: U.S. Department of the Interior Fish and Wildlife Service, Special Scientific Report--Fisheries No. 416

Experiments conducted at the Leavenworth, Wash., National Fish Hatchery in 1959 and 1960 demonstrated that the scale pattern of Columbia River sockeye salmon Oncorhynchus nerka can be recognizably modified by a short period of starvation.  Modification was obtained with little mortality.  Starved fish readily resumed feeding, and although they did not make up for lost growth, they regained their robustness and outward vigor.

The tests were the first in a series to determine whether a starvation-marking technique can be developed as a means of separating wild from hatchery-reared sockeye salmon. 

Notes: 20 pages