Download or read book The Fishery for Scup with Special Reference to Fluctuations in Yield and Their Causes written by William C. Neville and published by . This book was released on 1963 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The catch of scup over the past 50 years has fluctuated widely. Data on this fishery for recent years (1922-35), obtained from State and Federal agencies, commercial fishery, and fishermen, have been analysed to determine causes of fluctuations. It was found that fluctuations in the summer fishery from New Jersey to Massachusetts were caused mainly by differences in the size of the successive year classes entering the fishery. Fluctuations in the catch of the winter trawl fishery off the Virginia Capes resulted from changes in the amount of cooling of the bottom water where these fish are found in winter. During cold-water conditions, the fish became more concentrated and were more easily caught; whereas, when the water was warmer, the fish scattered more widely and were not as readily available. Although fluctuations in catch of the summer and winter fishery have different causes, results of tagging and observations of size composition have disclosed that both fisheries draw on the same general stock.
Download or read book The Fishery for Scup With Special Reference to Fluctuations in Yield and Their Causes Classic Reprint written by William C. Neville and published by Forgotten Books. This book was released on 2017-12-05 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Fishery for Scup With Special Reference to Fluctuations in Yield and Their Causes Scup (fig. 1) ranges along the eastern coast of the United States from South Carolina to Maine (holbrook, 1855; Bigelow and Welsh, South of New York scup is commonly known as porgy, and along the southern part of New England, as scup. 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.
Download or read book The Fishery for Scup with Special Reference to Fluctuations in Yield and Their Causes written by William C. Neville and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Report of the Bureau of Commercial Fisheries for the Calendar Year written by United States. Bureau of Commercial Fisheries and published by . This book was released on 1964 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estuarine Processes written by Martin Wiley and published by Academic Press. This book was released on 2014-05-10 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estuarine Processes, Volume I: Uses, Stresses, and Adaptation to the Estuary provides information pertinent to estuarine processes and focuses on dynamic interactions at several levels of organization. This book presents the strategies to rehabilitate and protect estuaries. Organized into seven parts encompassing 37 chapters, this volume begins with an overview of the alternative ways of attaining the pervasive goals of pollution abatement and estuarine management. This text then discusses the significance of maintaining estuarine environment quality if fisheries are to continue. Other chapters consider the great value of the estuarine zone, which lies in the multiplicity of uses it serves, but herein also lies its vulnerability. This book discusses as well the identification of the major factors regulating phytoplankton productivity and regulating the level of phytoplankton biomass. The final chapter deals with assessing the potential deleterious effects of certain toxicants to penaeid shrimp. This book is a valuable resource for ecologists, environmentalists, and scientists.
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