Sharks, Skates, and Rays PDF Download

Author: Perry W. Gilbert
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 646

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Author: Merry Camhi
Publisher: IUCN
ISBN: 9782831704609
Category : Nature
Languages : en
Pages : 50

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Book Description
Sharks and their relatives, the rays and chimaeras, are the diverse group of cartilaginous fishes that have evolved over 400 million years. Historically considered of low economic value to large-scale fisheries, today many of these fishes have become the target of directed commercial and recreational fisheries around the world, and they are increasingly taken in the by-catch of fisheries targeting other species. This report emphasizes the widely-acknowledged need to improve shark fishery monitoring, expand biological research and take management action. It serves as an introduction to the ecology, status and conservation of the sharks and their relatives for a general audience. Shark fisheries can only be managed sustainably, and shark populations remain viable, with the introduction of new conservation and management initiatives.

Author: Sarah L. Fowler
Publisher: IUCN
ISBN: 9782831707006
Category : Nature
Languages : fr
Pages : 198

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Author: Hermann Ehrlich
Publisher: Springer
ISBN: 9400757301
Category : Technology & Engineering
Languages : en
Pages : 439

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Book Description
This is the second monograph by the author on biological materials of marine origin. The initial book is dedicated to the biological materials of marine invertebrates. This work is a source of modern knowledge on biomineralization, biomimetics and materials science with respect to marine vertebrates. For the first time in scientific literature the author gives the most coherent analysis of the nature, origin and evolution of biocomposites and biopolymers isolated from and observed in the broad variety of marine vertebrate organisms (fish, reptilian, birds and mammals) and within their unique hierarchically organized structural formations. There is a wealth of new and newly synthesized information, including dozens of previously unpublished images of unique marine creatures including extinct, extant and living taxa and their biocomposite-based structures from nano- to micro – and macroscale. This monograph reviews the most relevant advances in the marine biological materials research field, pointing out several approaches being introduced and explored by distinct modern laboratories.

Author: Mohamed Nejmeddine Bradai
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN:
Category : Nature
Languages : en
Pages : 124

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In many fisheries they are, however, often landed and marketed.

Author: Leonard J. V. Compagno
Publisher: Food & Agriculture Org.
ISBN: 9789251045435
Category : Nature
Languages : en
Pages : 288

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An extensively rewritten, revised and updated version of the original FAO Catalogue of Sharks of the World. This volume reviews all 15 families, 25 genera and 57 species of living bullhead, mackerel and carpet sharks, including certain well-established but currently undescribed species, mainly from Australia.

Author:
Publisher:
ISBN:
Category : Encyclopedias and dictionaries
Languages : en
Pages : 1296

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Author: Joseph S. Nelson
Publisher: John Wiley & Sons
ISBN: 1119220823
Category : Nature
Languages : en
Pages : 752

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Book Description
Take your knowledge of fishes to the next level Fishes of the World, Fifth Edition is the only modern, phylogenetically based classification of the world’s fishes. The updated text offers new phylogenetic diagrams that clarify the relationships among fish groups, as well as cutting-edge global knowledge that brings this classic reference up to date. With this resource, you can classify orders, families, and genera of fishes, understand the connections among fish groups, organize fishes in their evolutionary context, and imagine new areas of research. To further assist your work, this text provides representative drawings, many of them new, for most families of fishes, allowing you to make visual connections to the information as you read. It also contains many references to the classical as well as the most up-to-date literature on fish relationships, based on both morphology and molecular biology. The study of fishes is one that certainly requires dedication—and access to reliable, accurate information. With more than 30,000 known species of sharks, rays, and bony fishes, both lobe-finned and ray-finned, you will need to master your area of study with the assistance of the best reference materials available. This text will help you bring your knowledge of fishes to the next level. Explore the anatomical characteristics, distribution, common and scientific names, and phylogenetic relationships of fishes Access biological and anatomical information on more than 515 families of living fishes Better appreciate the complexities and controversies behind the modern view of fish relationships Refer to an extensive bibliography, which points you in the direction of additional, valuable, and up-to-date information, much of it published within the last few years Fishes of the World, Fifth Edition is an invaluable resource for professional ichthyologists, aquatic ecologists, marine biologists, fish breeders, aquaculturists, and conservationists.

Author: David A. Ebert
Publisher: Springer Science & Business Media
ISBN: 1402097034
Category : Science
Languages : en
Pages : 242

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Book Description
Skates have become a concern in recent years due to the preponderance of these elasmobranchs that are caught as bycatch or as a directed fishery. This has raised concern because skates have life history characteristics that may make them vulnerable to over-exploitation. It was due to this concern that prompted Drs. David Ebert and James Sulikowski to organize an international symposium on the “Biology of Skates”. The aims and goals of the symposium were to bring together an international group of researchers to meet, discuss, perhaps develop collaborations, and present their most recent findings. The symposium was held over two days, on 13-14 July, 2006, in conjunction with the 22nd annual meeting of the American Elasmobranch Society in New Orleans, LA. A total of 31 authors from four countries contributed 16 papers that appear in this volume. The papers are broadly arranged into four separate categories: systematics and biogeography, diet and feeding ecology, reproductive biology, and age and growth. This is the first dedicated book on the biology of skates. We hope that readers will find this volume of interest and that it helps encourage and stimulate future research into these fascinating fishes.

Author: Robert E. Shadwick
Publisher: Academic Press
ISBN: 0128014377
Category : Science
Languages : en
Pages : 581

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Book Description
Fish Physiology: Physiology of Elasmobranch Fishes, Volume 34B is a useful reference for fish physiologists, biologists, ecologists, and conservation biologists. Following an increase in research on elasmobranchs due to the plight of sharks in today's oceans, this volume compares elasmobranchs to other groups of fish, highlights areas of interest for future research, and offers perspective on future problems. Covering measurements and lab-and-field based studies of large pelagic sharks, this volume is a natural addition to the renowned Fish Physiology series. - Provides needed comprehensive content on the physiology of elasmobranchs - Offers a systems approach between structure and interaction with the environment and internal physiology - Contains contributions by leading experts in their respective fields, under the guidance of internationally recognized and highly respected editors - Highlights areas of interest for future research, including perspective on future problems