Excerpt from Three Papers on the Stocks of Tunas in Japanese Waters Aikawa end Kat3'2) have determined the ages of the black tune from the ver tebrae and have established the ages for each length-weight class. As they have pointe? Out, their results disagree to some extent with those obtained by Kimnre One point which is difficult to explain is their finding that sixth year fish were not taken on the Shigedere grounds during the five years from 1924 to 1928. Nevertheless, in the present paper the discussion of the stock of the black tune will be based tentatively on the findings of hikawa and Kata. 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.