Author: Robert J. Ellis

Publisher: Forgotten Books

Published: 2016-10-08

Total Pages: 70

ISBN-13: 9781333895938

Excerpt from Distribution, Abundance, and Growth of Juvenile Sockeye Salmon, Oncorhynchus Nerka, and Associated Species in the Naknek River System, 1961-64 In the summers of 1961 to 1963, juvenile sockeye salmon in the pelagic areas had a characteristic pattern of abundance. For the entire system: abundance (catch per tow) of age 0 increased from early summer to midsummer and then declined to late August. The abundance in late August varied about threefold and, in general, was independent of variations in the number of parents from 1960 to 1963. In July the abundance of age 0 fish in each basin was proportional to the amount of known contiguous spawning ground, but by late August this relation no longer existed. This change was at least partly due to migration of the age 0 fish - generally from basins of greater abundance of fish to those of lesser abun dance. The larger and faster growing fish were the first to migrate. Not all basins were involved in these migrations. 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.