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Author: Frank J. Schwartz Publisher: ISBN: Category : Nature Languages : en Pages : 188
Book Description
This handy illustrated guide covers the ninety-one species of sharks, skates, and rays found in waters along the coasts of North Carolina and South Carolina. It will be an essential reference for shark enthusiasts, coastal residents, tourists, aquarium visitors, scientists, and anyone interested in these fascinating fishes. In his introduction, Frank J. Schwartz provides a general explanation of the physical features of sharks, skates, and rays. He also discusses matters such as the possible causes of shark attacks, conservation concerns surrounding sport and commercial shark fishing, breeding habits, and shark fossils. Each species of shark, skate, and ray is shown in a clear illustration, accompanied by a concise description and notes on its color, size, distribution, and occurrence. A series of keys based on physical characteristics will aid readers in accurately identifying each species.
Author: Frank J. Schwartz Publisher: ISBN: Category : Nature Languages : en Pages : 188
Book Description
This handy illustrated guide covers the ninety-one species of sharks, skates, and rays found in waters along the coasts of North Carolina and South Carolina. It will be an essential reference for shark enthusiasts, coastal residents, tourists, aquarium visitors, scientists, and anyone interested in these fascinating fishes. In his introduction, Frank J. Schwartz provides a general explanation of the physical features of sharks, skates, and rays. He also discusses matters such as the possible causes of shark attacks, conservation concerns surrounding sport and commercial shark fishing, breeding habits, and shark fossils. Each species of shark, skate, and ray is shown in a clear illustration, accompanied by a concise description and notes on its color, size, distribution, and occurrence. A series of keys based on physical characteristics will aid readers in accurately identifying each species.
Author: Leo S. Demski Publisher: Springer Science & Business Media ISBN: 940173450X Category : Science Languages : en Pages : 293
Book Description
This volume had its origin in a symposium on the Reproduction and Development of Cartilaginous Fishes that was held at the annual meetings of the American Elasmobranch Society and the American Society of Ichthyologists and Herpetologists in Charleston, South Carolina in 1990. The cartilaginous fishes, class Chondrichthyes, are a large and diverse group of fishes that include approximately 900 to 1100 living species of sharks, skates, rays and ratfishes. Throughout their history, which dates back at least 400 million years, they have been a successful major component of the marine ecosystem. The chondrichthyan fishes occupy a pivotal position in comparative and evolutionary studies of vertebrate reproduction and development. They are the oldest surviving group of jawed vertebrates and they possess both the adult vertebrate Bauplan and the vertebrate program of embryonic development. The major features of the female reproductive system, including its embryonic origin, structure, physiological function, and biochemistry, apparently were established early in vertebrate evolution and are fully developed in chondrichthyan fishes. These features of the female reproductive system have been retained during the evolution of the other classes of vertebrates. Much the same can be said for the male reproductive system. Moreover, viviparity, placental nourishment of developing embryos, and the hormonal regulation of these events made an initial appearance in this group. The 22 articles presented in this volume bring together a wide variety of complementary research by investigators from seven countries, allowing us to broaden the scope and implications of our studies while identifying opportunities for future research. The appearance of a volume on the reproduction and development of cartilaginous fishes is quite opportune. The continued existence of these fishes, which survived the great extinction events of Earth's history, is now threatened by overexploitation unless immediate steps for their conservation are undertaken. Knowledge of their reproduction and development not only is an end in itself, but is of critical importance in devising successful conservation and resource management strategies.
Author: William C. Hamlett Publisher: JHU Press ISBN: 9780801860485 Category : Nature Languages : en Pages : 542
Book Description
Successor to the classic work in shark studies, The Elasmobranch Fishes by John Franklin Daniel (first published 1922, revised 1928 and 1934), Sharks, Skates, and Rays provides a comprehensive and up-to-date overview of elasmobranch morphology. Coverage has been expanded from anatomy to include modern information on physiology and biochemistry. The new volume also provides equal treatment for skates and rays. The authors present general introductory material for the relative novice but also review the latest technical citations, making the book a valuable primary reference resource. More than 200 illustrations supplement the text.
Author: David Shiffman Publisher: JHU Press ISBN: 1421443651 Category : Science Languages : en Pages : 312
Book Description
Get submerged in the amazing world of sharks! Your expert host, award-winning marine biologist Dr. David Shiffman, will show you how—and why—we should protect these mysterious, misunderstood guardians of the ocean. Sharks are some of the most fascinating, most ecologically important, most threatened, and most misunderstood animals on Earth. More often feared than revered, their role as predators of the deep have earned them a reputation as a major threat to humans. But the truth is that sharks are not a danger to us—they're in danger from us. In Why Sharks Matter, marine conservation biologist Dr. David Shiffman explains why it's crucial that we overcome our misconceptions and rise above cinematic jump scares to embrace sharks as the imperiled and elegant ocean guardians they really are. Sharing his own fascinating experiences working with sharks, Shiffman tells us • why healthy shark populations are a must for supporting ocean ecosystems—and the coastal economies that depend on them • why we're in danger of losing many shark species forever • what scientists, conservationists, and readers can do to help save these iconic predators • why so much of what you've heard about sharks and how to save them is wrong Exploring the core tenets of shark conservation science and policy, Shiffman synthesizes decades of scientific research and policymaking, weaving it into a narrative full of humor and adventure. Touching on everything from Shark Week to shark fin soup, overfishing to marine sanctuaries, Shiffman reveals why sharks are in trouble, why we should care, and how we can save them. Perfect for shark enthusiasts, Why Sharks Matter is an approachable, informative guide to the world of shark conservation and the passionate, fascinating, brilliant people who work to understand and protect our oceans. This fun read will have you looking at sharks with a fresh perspective and an understanding that the survival of sharks is crucial to the survival of another apex predator—ourselves.
Author: Frank J. Schwartz
Author: Frank J. Schwartz
Author: Frank Joseph Schwartz
Author: Leo S. Demski
Author: Perry W. Gilbert
Author: John Richard Thompson
Author: William C. Hamlett
Author: Lewis Radcliffe
Author: 
Author: Jose I. Castro
Author: David Shiffman