The California Department of Fish and Game has received a continuing stream of requests from administrators, legislators, biologists, and sportsmen for basic, quantitative information on the life histories of the steelhead and silver salmon. This bulletin has been prepared in response to these requests.

As additional information about the steelhead and silver salmon is gathered the concepts regarding their management will be broadened and in some instances changed to meet new situations. However, the fundamental facts about the life histories of these fishes will remain unchanged and from this viewpoint this bulletin will have lasting value.