[PDF] Shark Research Present Status And Future Direction eBook

Author : Monterey Conference on shark research (1974 : Naval Postgraduate School (California))
Publisher :
Page : 0 pages
File Size : 14,72 MB
Release : 1975
Category : Sharks
ISBN :

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The sharsk are part of the major group of non-bony fishes known as elasmobranchs which include the skates and rays. The sharks are primarily carnivores and many of the larger species apparently are the top predators in their environment. This role is not widely appreciated and not well understood. In fact, the exact position and role of most of the species of sharks in the marine ecosystem is poorly known despite the large size and spectacularity of most kinds of sharks. The main areas of shark research discussed at the Monterey Conference included those which, in the past, had been judged to be of most interest to the U.S. Navy. These research areas have a more direct bearing on the capabilities of sharks to act as predators on humans. The results of these discussions constitute the main portion of this report.

Author : Bernard J Zahuranec
Publisher : Palala Press
Page : 60 pages
File Size : 12,56 MB
Release : 2015-09-06
Category :
ISBN : 9781341805349

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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Author :
Publisher : Forgotten Books
Page : 64 pages
File Size : 43,94 MB
Release : 2017-10-18
Category : Science
ISBN : 9780265466988

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Excerpt from Shark Research: Present Status and Future Direction, Oceanic Biology Program, April 1975 The sharks are part of the major group of non - bony fishes known as elasmobranchs which include the skates and rays. The sharks are primarily carnivores and many of the larger species apparently are the top predators in their environment. This role is not widely appreciated and not well understood. In fact, the exact position and role of most of the species of sharks in the marine ecosystem is poorly known despite the large size and spectacularity of most kinds of sharks. The main areas of shark research discussed at the Monterey Conference included those which, in the past, had been judged to be of most interest to the u.s. Navy. These research areas have a more direct bearing on the capabilities of sharks to act as predators on humans. Intentionally, no attempt was made to cover all aspects of elasmobranch research since these can be as diverse as the entire discipline of biology. In fact, it was suggested that a second workshop be.held in the future, concentrating on those aspects of elasmobranch biology such as immunobiology, cellular metabolism, pathology, etc., wherein the elasmobranch is essentially utilized simply as another kind of experimental animal of convenience or choice. In addition, because the conference was in the nature of a work shop discussing areas of potential future research, this resulting report cannot be considered a review of the entire field of elasmobranch research, even in those topics specifically covered and represented by the partici pants. 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.

Author : L. Bolis
Publisher : Springer Science & Business Media
Page : 202 pages
File Size : 42,74 MB
Release : 2012-12-06
Category : Science
ISBN : 3642699030

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The importance of toxins and other phanuacologically active com pounds obtained from marine animals cannot be emphasized enough. The use of these chemicals for defense or attack of other life fonus are of interest in themselves; however, they are of great importance in our understanding of their mechanisms of action in view of possible application in the defense of man (no doubt a predator) and in biol ogy and medicine. The toxin of the flat fish Pardachirus presented in some of the papers of this book is an example of a defense mechanism based on secretion of a toxin that could possibly be extended to being used to defend man himself from sharks, the marine predators par ex cellence. August, 1984 J. ZADUNAISKY Preface The study of toxins, drugs, and pollutants in the marine environment, and their impact on human life existed already in Babylon and Assyria, Egypt, Persia, India, China, Japan, Greece, Rome and South America. Nevertheless, less is known about ethnic marine biology than about ethnobotany. Only recently however, have active biotoxins been used as molecular probes in neuropharmacology, offering intriguing new insights into nervous activity and muscular functions. It is clear from the presentations at this meeting that much remains to be done, and certainly new, more pharmacologically oriented find ings lie ahead.

Author : Bernard J Zahuranec
Publisher : CRC Press
Page : 181 pages
File Size : 16,22 MB
Release : 2019-09-16
Category : Science
ISBN : 1000311392

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Some species of sharks, because they are large, agile predators, are extremely dangerous to humans in water. During World War II, the long-time goal of an effective shark repellent was partially realized by the U.S. Navy's development of "Shark Chaser," a copper acetate-negrosine dye mixture. But neither Shark Chaser nor other noxious or even extre

Author : Rachel Cunningham-Day
Publisher : Universal-Publishers
Page : 226 pages
File Size : 30,90 MB
Release : 2001
Category : Science
ISBN : 1581126522

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This book reviews the current status of, and threats to, shark populations globally with special reference to the basking shark and the great white shark. This book outlines why sharks are a valuable resource, identifies threats to sharks and where they occur and reviews what we need to know about sharks in order to protect them. Fisheries management procedures are investigated to target areas requiring future research and implementation. Conservation initiatives, legislation, and international agreements are reviewed and future measures suggested. Case histories on the basking shark and the great white shark detail threats specific to these species and identify research and management requirements.