Date of Award:

5-1957

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Natural Resources

Committee Chair(s)

William F. Sigler

Committee

William F. Sigler

Committee

John Neuhold

Committee

William Clark

Committee

William McConnell

Abstract

Any method used in aging fish must fulfill certain requirements to be satisfactory. If the method is inaccurate, naturally little reliance can be placed upon its use. If considerable study of the method and much practice are required before accurate readings can be obtained, the method will not come into widespread use. The requirements of an aging method, then are that it must be accurate and comparatively easy. The scale method for aging lake trout (Salvelinus namaycush Walbaum) unfortunately does not fulfill these requirements. It has always been difficult to tell the age of lake trout by the examination of scales--the standard method of aging most fish. Although a few researchers have successfully aged lake trout by the scale method, much training is necessary to be proficient. Older fish are particularly difficult to age by the scales.

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