Download or read book Fishery Bulletin of the Fish and Wildlife Service, 1956-58, Vol. 57 (Classic Reprint) written by U. S. Fish And Wildlife Service and published by Forgotten Books. This book was released on 2018-02-27 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Fishery Bulletin of the Fish and Wildlife Service, 1956-58, Vol. 57 Meanwhile, information about the growth and habits of these fish must be gathered as a basis for an intelligent program for restoration and manage ment of the fishery. In the study of the lake trout, it is imperative first to assess the reliability of ages determined from scales of the fish to validate them for the many uses to which age statistics and calculated lengths, based on measurements of scales, are put in population studies. Although determination of the age of lake trout from scales was considered difficult by Royce,3 Cooper, and Fuller and by Miller and Kennedy several investigators, including Greeley (1934 and Fry and Kennedy Fry (1949, and Van Oosten have read them with apparent assurance, but without establishing the validity of their readings. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.